Help with adding fuel at WOT
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Joined: Mar 2014
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From: Ohio
Then you'll be using the VE tables.
WOT will be the 100 kPa row. Higher numbers means more fuel, lower numbers means less fuel.
Select the entire row. In the box at the top type in 1.1, and hit the multiply sign. It will add 10% fuel at WOT no matter what RPM. Adjust from there.
WOT will be the 100 kPa row. Higher numbers means more fuel, lower numbers means less fuel.
Select the entire row. In the box at the top type in 1.1, and hit the multiply sign. It will add 10% fuel at WOT no matter what RPM. Adjust from there.
How lean is it now? How do you know it's lean (wideband?)
What is your PE ratio? Are you boosted?
Your logs should tell you (even just using the default config) how far off commanded A/F you are based on your wideband readings...
See here for a good starter guide: http://www.hptuners.com/help/vcm_edi...to_user_sd.htm
What is your PE ratio? Are you boosted?
Your logs should tell you (even just using the default config) how far off commanded A/F you are based on your wideband readings...
See here for a good starter guide: http://www.hptuners.com/help/vcm_edi...to_user_sd.htm
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Verdad Gallardo Yeah. Don't go WOT anymore.
You need to add about 15-17% more fuel in the VE table where you are seeing those readings. Take a look at what I posted. Walks you through the very basics of tuning using HPT. If you have EFILive the theory works the same way - just have to find the tables.
Either way, in the VE table in the 90kPa and up range across the RPMs you see, you'll need to multiply those cells by 1.17. Then take it out and see how far off it is from commanded. Should be within 1% and then you can adjust again if needed.
You need to add about 15-17% more fuel in the VE table where you are seeing those readings. Take a look at what I posted. Walks you through the very basics of tuning using HPT. If you have EFILive the theory works the same way - just have to find the tables.
Either way, in the VE table in the 90kPa and up range across the RPMs you see, you'll need to multiply those cells by 1.17. Then take it out and see how far off it is from commanded. Should be within 1% and then you can adjust again if needed.
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Joined: Aug 2010
Posts: 7,323
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From: Ann Arbor, MI
Unless the Power Enrichment -> EQ Ratio table got set to all 1.00, it sounds like your VE table is way off and very lean.
What is your AFR at cruising?
What is the commanded AFR at WOT?
The Power Enrichment -> EQ Ratio table tells the PCM what to command at WOT and the VE table's 95-100 rows are then tuned to make sure the actual values are within 1-2% of the commanded value.
In more detail, the Open Loop -> EQ Ratio table determines the commanded AFR as the Stoich AFR value divided (enriched) by the values in this table. The value will change according to temperature and can change according to kPa. The enrichment will be the greater of the values in this table and the values in the Power Enrichment -> EQ Ratio table.
You can tune the VE table by creating the "VE AFR Error" histogram and with a few clicks of the mouse correct the VE table. Very cool. JakeFusion's link above gives you more detailed instructions.
Follow those instructions and then let us know if you need more help.
The only thing I do differently is: I set both EQ Ratio tables to the same value, e.g. 1.15. That way the commanded AFR stays the same at all throttle positions and I don't get error spikes in my "VE AFR Error" histogram.
==> As mentioned above, until you get the VE table set accurately for cruising you should not go WOT because you are dangerously lean.
What is your AFR at cruising?
What is the commanded AFR at WOT?
The Power Enrichment -> EQ Ratio table tells the PCM what to command at WOT and the VE table's 95-100 rows are then tuned to make sure the actual values are within 1-2% of the commanded value.
In more detail, the Open Loop -> EQ Ratio table determines the commanded AFR as the Stoich AFR value divided (enriched) by the values in this table. The value will change according to temperature and can change according to kPa. The enrichment will be the greater of the values in this table and the values in the Power Enrichment -> EQ Ratio table.
You can tune the VE table by creating the "VE AFR Error" histogram and with a few clicks of the mouse correct the VE table. Very cool. JakeFusion's link above gives you more detailed instructions.
Follow those instructions and then let us know if you need more help.
The only thing I do differently is: I set both EQ Ratio tables to the same value, e.g. 1.15. That way the commanded AFR stays the same at all throttle positions and I don't get error spikes in my "VE AFR Error" histogram.
==> As mentioned above, until you get the VE table set accurately for cruising you should not go WOT because you are dangerously lean.
You should verify correct fuel pressure and injector data also. And simply running lean at WOT won't necessarily hurt anything. GM delays PE on truck tunes anywhere from .8 to 60 seconds and they warranty those vehicles. If you have too much timing for that A/F or detonation that is what will do damage.
Last edited by 2xLS1; Nov 18, 2016 at 07:57 PM.
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Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
Yes, please give us all info about your mods if you need more help.
As 2XLS1 pointed out, have you changed injectors or upgraded the fuel system?
What is your HP estimate when it works properly.
As 2XLS1 pointed out, have you changed injectors or upgraded the fuel system?
What is your HP estimate when it works properly.
Post #8 says 42 lb injectors. But 42 @ ? Bar. What brand? Any real data for them?
I set mine to 1.143 across the board and take a degree of timing out of the 4400 and 4800 columns in the main spark table (as that's where the greatest cylinder pressure occurs typically with LS engines with plastic intake manifolds).
Last edited by mrvedit; Nov 23, 2016 at 04:21 PM. Reason: Cleaning up replies due to JoeNova's typo in post #2
they are 42 ford green tops at 58 psi so technically they are bigger. i added around 20% to cure the wot condition but its still running sluggish. im new to alot of this. when i get a free day ill try to work on it some more and adjust it
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Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
If you post your tune here, we might be able to give better advice.
Please confirm that they are genuine Ford injectors and not the "Green Giant" injectors sold on ebay; the ebay ones are a cheap low-quality clones of unknown parameters and are known to stick wide open.
Are you running the stock fuel system? Is this a Gen 4 Camaro?
Please confirm that they are genuine Ford injectors and not the "Green Giant" injectors sold on ebay; the ebay ones are a cheap low-quality clones of unknown parameters and are known to stick wide open.
Are you running the stock fuel system? Is this a Gen 4 Camaro?
this thing feels really lazy. from what ive seen it should make around 450 give or take. and it doesnt even run like a bolt on ls1. its .030 lq4 with diamond pistons ,callies rods, stock crank. arp main studs and head bolta 243s ported by the best small block nitrous guy i know in the area. stainles valves btr spring kit 231 243 615ish lift 113 lsa. fast 92 92 hooker headers 3 in xpipe into single chamber mufflers biult 4l60e and 3.42 gears about 11.1 to1 compress