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Re: 97 pontiac sunfire 2.2 poor idle quality and eratic data
Posted to Technical Discussion Forum on 3/9/2007

Hi Thomas,

Some of your findings/observations are likely the result of the PCM seeing an input from your ECT sensor, that is telling the computer the engine temp is very high.

the ECT sensor is NEW, you say, but what voltage is present at the PCM sensor si... Login to read more.