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rich at idle need help!

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Old Mar 25, 2017, 09:55 PM   #1
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rich at idle need help!

any advice I cant seem to fix the idle I am running a 12.2-12.8 afr. new 02,TPS,no boost leaks. here is a log any advice?
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Old Mar 26, 2017, 11:43 AM   #2
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Your LT mid trim is maxed out at -25%. This means that your ECU is unable to lean the idle out any more. First you need to rescale your injectors to get the (mid) trim under control, and then adjust the latencies to get idle set up right. Go search for how to do this.
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Old Mar 26, 2017, 07:34 PM   #3
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Would Thatr throw off my tune?? Wot running good
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Old Mar 27, 2017, 10:37 PM   #4
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Not if you get you trims to +/- 2%, because you will probably need to increase injector scaling to do that. The injector scaling increase (reducing fueling) will be offset by an increase in LT mid from -25 to 0.

LT low and mid trims are added together to calculate WOT (open loop) fueling. Right now it is subtracting 25% from your fuel map in closed loop mid, and in open loop WOT operation. As your trims wander this will mess with your tip-in, mid and WOT tune quite badly.

Are you running closed loop at idle?
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