Quote:
Originally Posted by tomm.brz
Cold start use at first 100% PI, then 50% PI
Then when it s warmed it uses the PI/DI ratio tables, most often it s 100% DI during idle
That s pretty hard coded into ecu
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Well that’s very weird then. I don’t know what to believe anymore. Tuner is pointing to DI’s, but fuel trims are normal when idling. Only during cold starts is where fuel trims are funky!!! Warmed up, the car is good.
Maybe it’s a problem somewhere else.. i haven’t gotten under the car to check for exhaust leaks yet.
Also, when you say it’s hard-coded in the ECU, do you mean that there is no way a tuner can edit those ratios?
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