callen8
24th February, 2020, 04:34 PM
hi can any one help me please need dtc p0171 trim system lean removed ecu is ac delco e78 thanks in advance
b44ly
24th February, 2020, 04:48 PM
you have air leak, dtc delete will hide problem. fix issue, easy to check. disconnect pvc, plug the pipe, check lambda values to see if correct after.
https://www.youtube.com/watch?v=VBY15y1OKyk
callen8
24th February, 2020, 04:52 PM
will check thanks we have smoke tested intake no issues
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