Speed Density and Reduce Engine Power, 01 Z06???
Speed Density and Reduce Engine Power, 01 Z06??? I'm attempting the fairly straight forward right up done by EFI Live for speed density on a 01 z06 with a large cam. The problem is that one of the steps requires the removal of the maf sensor from operation. When I do it via fail frequenceis and or unpluggin the maf the car goes into reduce engine power mode. How do you get around this in a corvette, is there something in EFI Live with engine protection in which you turn off? Thanks and any suggestions are appreciated.
On an 01 Z06, the MAF has the air intake temp sensor, so it cannot be unplugged. Bst way on a vette is to just simply set the MAF Fail Freq. to 0, dont disconnect anything. That will put you in SD mode.
Thats how I do it on my 02 Z06.
Dixit
Thats how I do it on my 02 Z06.
Dixit
Originally Posted by Dixit
On an 01 Z06, the MAF has the air intake temp sensor, so it cannot be unplugged. Bst way on a vette is to just simply set the MAF Fail Freq. to 0, dont disconnect anything. That will put you in SD mode.
Thats how I do it on my 02 Z06.
Dixit
Thats how I do it on my 02 Z06.
Dixit
Is it possible that one needs to be set to zero and the problem will then go away?
Originally Posted by Dixit
So when the MAF fail is set to the normal 12500 it works fine? Then seems like your idle airflow is horrible off and those numbers need to be inline before going into SD mode.
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More then likely the reason for the Reduced Power mode is you are throwing a P1514 code. The happens to many while SD tuning
You will need to (temporarily) bump up your TPS Sensor, Calc Airflow table. I would say by 15%. That is what I usually do. Then when you turn the MAF back on just change the table back to the previous values... This is assuming you want to go back to the MAF... If not change the table and leave it...
P1514:
Calculated Airflow vs. TPS% vs. RPM - P1514/P0068 Error: The VCM uses this table to determine the maximum airflow/cylair the Electronic Throttle should be passing at a certain TPS position and RPM. If the measured cylair/airflow exceeds this value then P1514/P0068 is set.
Calculated Airflow vs. TPS% vs. RPM - P1514/P0068 Error: The VCM uses this table to determine the maximum airflow/cylair the Electronic Throttle should be passing at a certain TPS position and RPM. If the measured cylair/airflow exceeds this value then P1514/P0068 is set.
Last edited by SideStep; Jan 22, 2006 at 05:00 PM.
Originally Posted by SideStep
More then likely the reason for the Reduced Power mode is you are throwing a P1514 code. The happens to many while SD tuning
You will need to (temporality) bump up your TPS Sensor, Calc Airflow table. I would say by 15%. That is what I usually do. Then when you turn the MAF back on just change the table back to the previous values... This is assuming you want to go back to the MAF... If not change the table and leave it...
You will need to (temporality) bump up your TPS Sensor, Calc Airflow table. I would say by 15%. That is what I usually do. Then when you turn the MAF back on just change the table back to the previous values... This is assuming you want to go back to the MAF... If not change the table and leave it...
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You want it drop right into SD, so..... -> {C2903} MAF High Frequency Fail Limit = 1. Mine did the same thing until I set {C2903} to 1.
Stock {C2903} is 12!!
From EFILive -> " {C2903} With the engine running if the MAF sensor frequency is equal to or goes above {C2901} "MAF High Frequency Fail 1" this many times then DTC P0103 will set."
You need the DTC P0103 "set" in order to drop into speed density.
This info was added to TAQuickness' write up on EFILive- it is easiy missed.
See these steps ->
25) Go to {C2901} "Engine Diagnostics > MAF > Parameters"
26) Set {C2901} "MAF High Frequency Fail 1" = 0
27) Go to {C290x} "Engine Diagnostics > MAF > Parameters"
28) Set {C290x} "MAF High Frequency Fail Limit" = 1
Hope this helps some.
Stock {C2903} is 12!!
From EFILive -> " {C2903} With the engine running if the MAF sensor frequency is equal to or goes above {C2901} "MAF High Frequency Fail 1" this many times then DTC P0103 will set."
You need the DTC P0103 "set" in order to drop into speed density.
This info was added to TAQuickness' write up on EFILive- it is easiy missed.
See these steps ->
25) Go to {C2901} "Engine Diagnostics > MAF > Parameters"
26) Set {C2901} "MAF High Frequency Fail 1" = 0
27) Go to {C290x} "Engine Diagnostics > MAF > Parameters"
28) Set {C290x} "MAF High Frequency Fail Limit" = 1
Hope this helps some.
Originally Posted by DAPSUPRSLO
I'm attempting the fairly straight forward right up done by EFI Live for speed density on a 01 z06 with a large cam. The problem is that one of the steps requires the removal of the maf sensor from operation. When I do it via fail frequenceis and or unpluggin the maf the car goes into reduce engine power mode. How do you get around this in a corvette, is there something in EFI Live with engine protection in which you turn off? Thanks and any suggestions are appreciated.
Last edited by hc_performance; Jan 22, 2006 at 08:03 PM.
Originally Posted by DAPSUPRSLO
I'm attempting the fairly straight forward right up done by EFI Live for speed density on a 01 z06 with a large cam. The problem is that one of the steps requires the removal of the maf sensor from operation. When I do it via fail frequenceis and or unpluggin the maf the car goes into reduce engine power mode. How do you get around this in a corvette, is there something in EFI Live with engine protection in which you turn off? Thanks and any suggestions are appreciated.
Last edited by hc_performance; Jan 22, 2006 at 08:02 PM.
Thanks a bunch guys. It is not so nice out today so i'm not sure how much i'll get to do after work but we'll see. In any event this is very helpful information.
Bink, I believe the write up i'm using actually has that instruction as well but I will certainly double check. Thanks.
hc_performance, it's a cam I spec'd out for this guy which is a 239/242 108icl (actually 110icl now as we had to retard it for p/v reasons cause the cam was ground wrong at a 106icl) .651/.613 cam. With the maf the car drives about 80% but when cruzing sometimes the car will dump a ton of fuel making the car go from 15-16/1 a/f at cruz to 11 to 1 a/f at cruz and setting the maf low activity code. Reversion owns this MAF, lol.
Thanks guys and i'll be certain to post how it ends up
Bink, I believe the write up i'm using actually has that instruction as well but I will certainly double check. Thanks.
hc_performance, it's a cam I spec'd out for this guy which is a 239/242 108icl (actually 110icl now as we had to retard it for p/v reasons cause the cam was ground wrong at a 106icl) .651/.613 cam. With the maf the car drives about 80% but when cruzing sometimes the car will dump a ton of fuel making the car go from 15-16/1 a/f at cruz to 11 to 1 a/f at cruz and setting the maf low activity code. Reversion owns this MAF, lol.
Thanks guys and i'll be certain to post how it ends up
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Posts: 2,261
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Originally Posted by DAPSUPRSLO
Thanks a bunch guys. It is not so nice out today so i'm not sure how much i'll get to do after work but we'll see. In any event this is very helpful information.
Bink, I believe the write up i'm using actually has that instruction as well but I will certainly double check. Thanks.
hc_performance, it's a cam I spec'd out for this guy which is a 239/242 108icl (actually 110icl now as we had to retard it for p/v reasons cause the cam was ground wrong at a 106icl) .651/.613 cam. With the maf the car drives about 80% but when cruzing sometimes the car will dump a ton of fuel making the car go from 15-16/1 a/f at cruz to 11 to 1 a/f at cruz and setting the maf low activity code. Reversion owns this MAF, lol.
Thanks guys and i'll be certain to post how it ends up
Bink, I believe the write up i'm using actually has that instruction as well but I will certainly double check. Thanks.
hc_performance, it's a cam I spec'd out for this guy which is a 239/242 108icl (actually 110icl now as we had to retard it for p/v reasons cause the cam was ground wrong at a 106icl) .651/.613 cam. With the maf the car drives about 80% but when cruzing sometimes the car will dump a ton of fuel making the car go from 15-16/1 a/f at cruz to 11 to 1 a/f at cruz and setting the maf low activity code. Reversion owns this MAF, lol.
Thanks guys and i'll be certain to post how it ends up
Thanks so much everyone, especially HumpinSS for spending the time on Yahoo IM with me. It was the predicted airflow table vs ETC that needed to be fixed. I've done one log and re-flash on this car and it's comming right along. SD is the shizit and don't think i'll be going back to maf anytime soon. It really changed the way the car sounds and responds but that is probably a function of much much more fuel at idle (idle used to be 20 to 1, now in SD it is 14 ish) but I may fine tune that. Thanks very very much once again guys! I'll post a sound clip once I get this car 100%. Man, it's tuff gettin up at 6a.m. just to tune a car before you go to your normal job, lol
Last edited by DAPSUPRSLO; Jan 24, 2006 at 03:11 PM.
