Quote:
Originally Posted by solidONE
Who else here has found the temperature compensation for the fueling is off by a good amount. While logging with about 90-95 degrees IAT's vs. 70-75* IAT's I found that fuel trims can vary about 4-5% for any given MAF voltage. Anyone else notice this? Fuel trim go up in hotter temps but get trimmed back in lower temps, it seems.
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Yes noticed similar mostly at idle where iat climhs in traffic fuel trim in lower band moves 4 to5 percent however need to look at if the temp comp is for sensor error at differnt temps or ita actually to compensate for the density change in the air.
the sensor is trying to measure mass of air colder air more dense so it most likely needs to add fuel so moves fuel trim positive.
not sure will have to think about it