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-   -   rich at idle need help! (https://www.evolutionm.net/forums/ecu-flash/738627-rich-idle-need-help.html)

bluedemon199 Mar 25, 2017 09:55 PM

rich at idle need help!
 
1 Attachment(s)
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?

CDrinkH2O Mar 26, 2017 11:43 AM

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.

bluedemon199 Mar 26, 2017 07:34 PM

Would Thatr throw off my tune?? Wot running good

CDrinkH2O Mar 27, 2017 10:37 PM

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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