LTFT????
01-25-2003, 11:11 PM
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LTFT???? I'm trying to get my car tuned properly and I need to know were I need to have my LTFT. And which bank should I look at 1 or 2. I also can't seem to get my WOT above 11.9. I have my MAFT set at 4% lean now should I go more? TIA ....Scott
01-26-2003, 11:53 AM
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Re: LTFT???? With any scanner, you can begin to look at LTFTs from both banks, 1 and 2. 1 is driver side, 2 is passenger side. In a perfect world, they would be identical. But since, the engine is not truely symmetrical and O2 sensor are different (and other reasons), the bank 1 LTFT value will almost never be the same as the bank 2 LTFT value.
Another complication is that there are several LTFTs, one for each fuel cell, there are (I think) about 22 fuel cells.. I think 19 is for idle, 22 is for WOT, 21 is for decel.
Now about your MAFT, there are at least two dial switches inside the case, Mine had 2, one for base (part throotle operation), and one for WOT.
You state that you are at 4% lean, which one are you talking about???
You can effect the WOT AFR with adjustments with both switches, base and WOT!!!!! Believe it or not.
Another complication is that there are several LTFTs, one for each fuel cell, there are (I think) about 22 fuel cells.. I think 19 is for idle, 22 is for WOT, 21 is for decel.
Now about your MAFT, there are at least two dial switches inside the case, Mine had 2, one for base (part throotle operation), and one for WOT.
You state that you are at 4% lean, which one are you talking about???
You can effect the WOT AFR with adjustments with both switches, base and WOT!!!!! Believe it or not.
01-26-2003, 01:18 PM
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Re: LTFT???? Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly.
01-26-2003, 02:12 PM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com
-------------------------------------------------
Here are some things I have learned so far:
Cell definitions, courtesy of TeamZR1:
Non load cells 0-5, 21
Idle 17-20
Part Throttle 6-14
WOT 15, 22
-------------------------------------------------
If I was to continue to read there are a couple more variations..... <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> some one needs to post a GM tech site that lists what the REAL cells are and stop the confusion SHEESH <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com
-------------------------------------------------
Here are some things I have learned so far:
Cell definitions, courtesy of TeamZR1:
Non load cells 0-5, 21
Idle 17-20
Part Throttle 6-14
WOT 15, 22
-------------------------------------------------
If I was to continue to read there are a couple more variations..... <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> some one needs to post a GM tech site that lists what the REAL cells are and stop the confusion SHEESH <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
01-26-2003, 09:57 PM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Doc99SShome:
<strong> With any scanner, you can begin to look at LTFTs from both banks, 1 and 2. 1 is driver side, 2 is passenger side. In a perfect world, they would be identical. But since, the engine is not truely symmetrical and O2 sensor are different (and other reasons), the bank 1 LTFT value will almost never be the same as the bank 2 LTFT value.
Another complication is that there are several LTFTs, one for each fuel cell, there are (I think) about 22 fuel cells.. I think 19 is for idle, 22 is for WOT, 21 is for decel.
Now about your MAFT, there are at least two dial switches inside the case, Mine had 2, one for base (part throotle operation), and one for WOT.
You state that you are at 4% lean, which one are you talking about???
You can effect the WOT AFR with adjustments with both switches, base and WOT!!!!! Believe it or not. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Currently I have it set on 5% rich at idle and 4% lean on WOT.....Scott
<strong> With any scanner, you can begin to look at LTFTs from both banks, 1 and 2. 1 is driver side, 2 is passenger side. In a perfect world, they would be identical. But since, the engine is not truely symmetrical and O2 sensor are different (and other reasons), the bank 1 LTFT value will almost never be the same as the bank 2 LTFT value.
Another complication is that there are several LTFTs, one for each fuel cell, there are (I think) about 22 fuel cells.. I think 19 is for idle, 22 is for WOT, 21 is for decel.
Now about your MAFT, there are at least two dial switches inside the case, Mine had 2, one for base (part throotle operation), and one for WOT.
You state that you are at 4% lean, which one are you talking about???
You can effect the WOT AFR with adjustments with both switches, base and WOT!!!!! Believe it or not. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Currently I have it set on 5% rich at idle and 4% lean on WOT.....Scott
01-26-2003, 09:59 PM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I am kinda new to A-Tap, how do I log the LTFT's.....Scott
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I am kinda new to A-Tap, how do I log the LTFT's.....Scott
01-27-2003, 12:31 AM
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Re: LTFT???? From Understanding the GENIII LS1/LS6 Control Systems and PCM
Fuel Cells
The PCM will move from cell to cell under varying conditions.
There are 22 Fuel Cells, and are as follows:
1-19 – used to update fuel trims
20 – Idle Cell
21 – Deceleration Cell
22 – WOT (Power Enrichment mode)
Fuel Cells
The PCM will move from cell to cell under varying conditions.
There are 22 Fuel Cells, and are as follows:
1-19 – used to update fuel trims
20 – Idle Cell
21 – Deceleration Cell
22 – WOT (Power Enrichment mode)
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01-27-2003, 01:22 AM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by J&JsTA:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The answer is simplicity in itself: go out and sit at idle in neutral --->>> 19. Click the A/C or defroster on while still in neutral --->>> 18.
Decelerate in gear (eg. foot off of accelerator without braking) and you get 0's/1's etc.
Part throttle acceleration in any gear and you get 4's, 9's, 12's, etc.
WOT --->>> 22 ONLY.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> I am kinda new to A-Tap, how do I log the LTFT's.....Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Connect to your car with Atap. Go to Gauges in Atap and record your Long Term Fuel Trim Bank 1 and Bank 2 (LTFT B1, LTFT B2), and Fuel Cell Trim (these parameters are in Atap).
Drive around town for a while eg. 20 - 30 minutes. Switch gears normally.
Stop recording. Open that log up in playback mode. Go to Log and click export to comma delimited file. This will export your log to Excel or whatever you use. When this is done, close out of Atap and open the Excel log file.
Delete any column that does not contain Fuel Cells 4 thru 16.
Average the remaining LTFT's.
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" />
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The answer is simplicity in itself: go out and sit at idle in neutral --->>> 19. Click the A/C or defroster on while still in neutral --->>> 18.
Decelerate in gear (eg. foot off of accelerator without braking) and you get 0's/1's etc.
Part throttle acceleration in any gear and you get 4's, 9's, 12's, etc.
WOT --->>> 22 ONLY.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> I am kinda new to A-Tap, how do I log the LTFT's.....Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Connect to your car with Atap. Go to Gauges in Atap and record your Long Term Fuel Trim Bank 1 and Bank 2 (LTFT B1, LTFT B2), and Fuel Cell Trim (these parameters are in Atap).
Drive around town for a while eg. 20 - 30 minutes. Switch gears normally.
Stop recording. Open that log up in playback mode. Go to Log and click export to comma delimited file. This will export your log to Excel or whatever you use. When this is done, close out of Atap and open the Excel log file.
Delete any column that does not contain Fuel Cells 4 thru 16.
Average the remaining LTFT's.
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" />
01-27-2003, 06:59 AM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by J&JsTA:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The answer is simplicity in itself: go out and sit at idle in neutral --->>> 19. Click the A/C or defroster on while still in neutral --->>> 18.
Decelerate in gear (eg. foot off of accelerator without braking) and you get 0's/1's etc.
Part throttle acceleration in any gear and you get 4's, 9's, 12's, etc.
WOT --->>> 22 ONLY.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> I am kinda new to A-Tap, how do I log the LTFT's.....Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Connect to your car with Atap. Go to Gauges in Atap and record your Long Term Fuel Trim Bank 1 and Bank 2 (LTFT B1, LTFT B2), and Fuel Cell Trim (these parameters are in Atap).
Drive around town for a while eg. 20 - 30 minutes. Switch gears normally.
Stop recording. Open that log up in playback mode. Go to Log and click export to comma delimited file. This will export your log to Excel or whatever you use. When this is done, close out of Atap and open the Excel log file.
Delete any column that does not contain Fuel Cells 4 thru 16.
Average the remaining LTFT's.
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the quick reply!!! I am going to be doing it first thing this morning.....Thanks Scott
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by J&JsTA:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The answer is simplicity in itself: go out and sit at idle in neutral --->>> 19. Click the A/C or defroster on while still in neutral --->>> 18.
Decelerate in gear (eg. foot off of accelerator without braking) and you get 0's/1's etc.
Part throttle acceleration in any gear and you get 4's, 9's, 12's, etc.
WOT --->>> 22 ONLY.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> I am kinda new to A-Tap, how do I log the LTFT's.....Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Connect to your car with Atap. Go to Gauges in Atap and record your Long Term Fuel Trim Bank 1 and Bank 2 (LTFT B1, LTFT B2), and Fuel Cell Trim (these parameters are in Atap).
Drive around town for a while eg. 20 - 30 minutes. Switch gears normally.
Stop recording. Open that log up in playback mode. Go to Log and click export to comma delimited file. This will export your log to Excel or whatever you use. When this is done, close out of Atap and open the Excel log file.
Delete any column that does not contain Fuel Cells 4 thru 16.
Average the remaining LTFT's.
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the quick reply!!! I am going to be doing it first thing this morning.....Thanks Scott
01-27-2003, 02:35 PM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> Thanks for the quick reply!!! I am going to be doing it first thing this morning.....Thanks Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif"><img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
<strong> <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> Thanks for the quick reply!!! I am going to be doing it first thing this morning.....Thanks Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif"><img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />
01-27-2003, 04:58 PM
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Re: LTFT???? Don't count on your A/F ration showing more than 11.9 in ATAP <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I haven't had any luck with that yet. They say you should only pay attention to your O2 sensors at WOT anyway.
01-27-2003, 05:54 PM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by WS6 GreeN:
<strong> Don't count on your A/F ration showing more than 11.9 in ATAP <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I haven't had any luck with that yet. They say you should only pay attention to your O2 sensors at WOT anyway. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I can't get it lower thean 11.9:1 at WOT....
<strong> Don't count on your A/F ration showing more than 11.9 in ATAP <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> I haven't had any luck with that yet. They say you should only pay attention to your O2 sensors at WOT anyway. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I can't get it lower thean 11.9:1 at WOT....
01-28-2003, 11:43 AM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by J&JsTA:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The answer is simplicity in itself: go out and sit at idle in neutral --->>> 19. Click the A/C or defroster on while still in neutral --->>> 18.
Decelerate in gear (eg. foot off of accelerator without braking) and you get 0's/1's etc.
Part throttle acceleration in any gear and you get 4's, 9's, 12's, etc.
WOT --->>> 22 ONLY.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> I am kinda new to A-Tap, how do I log the LTFT's.....Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Connect to your car with Atap. Go to Gauges in Atap and record your Long Term Fuel Trim Bank 1 and Bank 2 (LTFT B1, LTFT B2), and Fuel Cell Trim (these parameters are in Atap).
Drive around town for a while eg. 20 - 30 minutes. Switch gears normally.
Stop recording. Open that log up in playback mode. Go to Log and click export to comma delimited file. This will export your log to Excel or whatever you use. When this is done, close out of Atap and open the Excel log file.
Delete any column that does not contain Fuel Cells 4 thru 16.
Average the remaining LTFT's.
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the quick reply!!! I am going to be doing it first thing this morning.....Thanks Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I logged the LTFT's yesterday deleted all the cells that werenot between 4,16 and averaged them out. My grand average for bank 1 is 2.01, and my grand average for bank 2 is 0.98. Should I adjust the richness on idle another notch or is this good?? TIA...Scott
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by J&JsTA:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> Scott, take a long autotap log and average both passenger and driver-side Lterms when they are in fuel cells 4 - 16.
Your WOT Lterms should go to 0 once you've gotten your cruising Lterms (those that appear in 4-16 cells) negative. After you've made a BASE adjustment, remember to give your PCM ~40 learning miles before you tap part-throttle Lterms again. Try and get them around -1.
Always tune your BASE MAFT, or cruising/part-throttle, first; then log your WOT and adjust WOT settings accordingly. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">One day I would love to get a definative answer on fuel cell monitoring.
Here's another answer from a search in LS1.com </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The answer is simplicity in itself: go out and sit at idle in neutral --->>> 19. Click the A/C or defroster on while still in neutral --->>> 18.
Decelerate in gear (eg. foot off of accelerator without braking) and you get 0's/1's etc.
Part throttle acceleration in any gear and you get 4's, 9's, 12's, etc.
WOT --->>> 22 ONLY.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong> I am kinda new to A-Tap, how do I log the LTFT's.....Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Connect to your car with Atap. Go to Gauges in Atap and record your Long Term Fuel Trim Bank 1 and Bank 2 (LTFT B1, LTFT B2), and Fuel Cell Trim (these parameters are in Atap).
Drive around town for a while eg. 20 - 30 minutes. Switch gears normally.
Stop recording. Open that log up in playback mode. Go to Log and click export to comma delimited file. This will export your log to Excel or whatever you use. When this is done, close out of Atap and open the Excel log file.
Delete any column that does not contain Fuel Cells 4 thru 16.
Average the remaining LTFT's.
<img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks for the quick reply!!! I am going to be doing it first thing this morning.....Thanks Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I logged the LTFT's yesterday deleted all the cells that werenot between 4,16 and averaged them out. My grand average for bank 1 is 2.01, and my grand average for bank 2 is 0.98. Should I adjust the richness on idle another notch or is this good?? TIA...Scott
01-28-2003, 01:53 PM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong>I logged the LTFT's yesterday deleted all the cells that werenot between 4,16 and averaged them out. My grand average for bank 1 is 2.01, and my grand average for bank 2 is 0.98. Should I adjust the richness on idle another notch or is this good?? TIA...Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Assuming that your banks are both +, yes.
You need to have them average a negative integer. You're +1.495 now. Click yourself another notch, give it some miles, and tap again <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
<strong>I logged the LTFT's yesterday deleted all the cells that werenot between 4,16 and averaged them out. My grand average for bank 1 is 2.01, and my grand average for bank 2 is 0.98. Should I adjust the richness on idle another notch or is this good?? TIA...Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Assuming that your banks are both +, yes.
You need to have them average a negative integer. You're +1.495 now. Click yourself another notch, give it some miles, and tap again <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
01-28-2003, 06:37 PM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by The Dragon:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong>I logged the LTFT's yesterday deleted all the cells that werenot between 4,16 and averaged them out. My grand average for bank 1 is 2.01, and my grand average for bank 2 is 0.98. Should I adjust the richness on idle another notch or is this good?? TIA...Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Assuming that your banks are both +, yes.
You need to have them average a negative integer. You're +1.495 now. Click yourself another notch, give it some miles, and tap again <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks. First thing tomorrow morning I'll be doing it again. Sorry to keep this thread going but you are a big help.....Scott
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by sconnor:
<strong>I logged the LTFT's yesterday deleted all the cells that werenot between 4,16 and averaged them out. My grand average for bank 1 is 2.01, and my grand average for bank 2 is 0.98. Should I adjust the richness on idle another notch or is this good?? TIA...Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Assuming that your banks are both +, yes.
You need to have them average a negative integer. You're +1.495 now. Click yourself another notch, give it some miles, and tap again <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks. First thing tomorrow morning I'll be doing it again. Sorry to keep this thread going but you are a big help.....Scott
01-29-2003, 05:02 PM
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Re: LTFT???? [/QUOTE]Assuming that your banks are both +, yes.
You need to have them average a negative integer. You're +1.495 now. Click yourself another notch, give it some miles, and tap again <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> [/QB][/QUOTE]
Dude I did it again today, my average for bank 1 is -2.66, and bank 2 is -.3.46. Sorry to keep bothering you with this but it seems like you are the man to talk to about it. Let me ask you this, I have a Granatelli MAF and I need to know if I should turn the switch for the 85mm MAF on or leave it off? Thanks Scott
You need to have them average a negative integer. You're +1.495 now. Click yourself another notch, give it some miles, and tap again <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> [/QB][/QUOTE]
Dude I did it again today, my average for bank 1 is -2.66, and bank 2 is -.3.46. Sorry to keep bothering you with this but it seems like you are the man to talk to about it. Let me ask you this, I have a Granatelli MAF and I need to know if I should turn the switch for the 85mm MAF on or leave it off? Thanks Scott
01-29-2003, 06:42 PM
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Re: LTFT???? Just keep it just like it is now. You are perfect for LTFTs now. If you switch something around, you will have to re-dial in the correct base setting for a 85mm MAF to get your LTFTs back to negative.
Because the 85mm MAF comes with different flow frequencies, you should have made a switch in the first place. But you are OK now, so leave it alone. I never change a switch when I tuned my MAFT when I had my GMAF installed.
Now its time to dial in the WOT switch.
Because the 85mm MAF comes with different flow frequencies, you should have made a switch in the first place. But you are OK now, so leave it alone. I never change a switch when I tuned my MAFT when I had my GMAF installed.
Now its time to dial in the WOT switch.
01-30-2003, 12:53 AM
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Re: LTFT???? </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Doc99SShome:
<strong> Just keep it just like it is now. You are perfect for LTFTs now. If you switch something around, you will have to re-dial in the correct base setting for a 85mm MAF to get your LTFTs back to negative.
Because the 85mm MAF comes with different flow frequencies, you should have made a switch in the first place. But you are OK now, so leave it alone. I never change a switch when I tuned my MAFT when I had my GMAF installed.
Now its time to dial in the WOT switch. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sounds great!!!! Thanks.....Scott
<strong> Just keep it just like it is now. You are perfect for LTFTs now. If you switch something around, you will have to re-dial in the correct base setting for a 85mm MAF to get your LTFTs back to negative.
Because the 85mm MAF comes with different flow frequencies, you should have made a switch in the first place. But you are OK now, so leave it alone. I never change a switch when I tuned my MAFT when I had my GMAF installed.
Now its time to dial in the WOT switch. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sounds great!!!! Thanks.....Scott
01-31-2003, 12:31 AM
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Re: LTFT???? If you had Edit, I'd recommend getting them to -1 for best gas mileage but, as Doc said, -3 is fine.
Moving to WOT tuning Baby! <img border="0" alt="[evil]" title="" src="graemlins/gr_devil.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Moving to WOT tuning Baby! <img border="0" alt="[evil]" title="" src="graemlins/gr_devil.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
