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A/F goes to 11:1 @ 5000 '04 Corvette

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Old 06-07-2004, 09:28 PM
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Default A/F goes to 11:1 @ 5000 '04 Corvette

Anyone try to tune an '04 Corvette. The thing goes fat at 5000 no matter how much I decrease the PE multiplier vs. rpm using LS1 edit. There has to be a way to lean out the mixture using some other table. I've been told GM does that to keep the engine safe, but it's sure hurting the power...
Old 06-07-2004, 09:43 PM
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Have you turned off COT?
Old 06-12-2004, 02:15 PM
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Default 04 vette 02's go fat at 5000

Does the COT cause the A/F to go fat at about 5000 rpm? If so, will raising the COT temps fix it? Can you just turn the test off if you have no cats?
Old 06-12-2004, 09:35 PM
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Cot adds fuel to cool the cats under wot. Just toggle it off in edit.
Old 06-13-2004, 06:23 AM
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Excuse my ignorance, but what does COT stand for? I think this may be happening with my Monaro. The current model runs much richer than before under WOT, and it may be fuel dumping and cutting power.

Where do I find it in LS1 Edit?
Old 06-13-2004, 08:20 AM
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Originally Posted by MNR-0
Excuse my ignorance, but what does COT stand for? I think this may be happening with my Monaro. The current model runs much richer than before under WOT, and it may be fuel dumping and cutting power.

Where do I find it in LS1 Edit?
I believe "Converter Over Temperature"
Old 06-13-2004, 10:29 AM
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Here is how to get to it

Edit--->Engine Cal--->Test Parameters--->COT Enabled--->False

Save file.




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