Quote:
Originally Posted by BNaylor
For long term or short term fuel trims using a scan tool capable of logging the data the ideal figure to achieve is 0 % but that will probably never happen. Ideal fuel trim = zero. Greater than zero indicates the PCM is adding fuel to compensate for the lean condition. If fuel trim is less than zero the PCM is reducing the amount of fuel to compensate for a rich condition.
The fuel trims are considered abnormal when you see the following on the scan tool on a L32 SIII 3800 or L67 SII 3800 engine.
LT fuel trim is greater than (+) (-) 17%. ST fuel trim greater than (+) (-) 2%.
If the fuel trims are really off a P0171 or P0172 DTC should set.
I'm not an expert on E85 builds but IMO your fuel injectors are too large given the mods you have and for your whp. The figures I've seen are 30% for more fuel supply increase. The stock fuel injectors are rated at 33#. So 42.5# injectors are more in line with your particular E85 build and mods versus using 60#.
Also you might consider investing in your own powertuner like an HP Tuners kit if you plan on continuing to run E85.
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every one thinks its 30 percent more its actually 42 percent
well think about it think way if i was maxing out my 33 # with gasoline
i easliy max out e85 on 42 thats why i decided to get the big dogs i was gunna get 80 #
idk my cars maf lb per min or what every is 2.12 around there and calclload at idle is 40 percent
i have check numnerous cars that say .62 or .84 but not 2 at idle
oh i think about getting a power tuner every day i dont wanna pay no more