Ok, updated sig. This situation is on the Monte Carlo.
Right now, I only have the code and whenever I first start it, the idle stumbles around a bit high and low. That is after I clear the code. I just read that it performs EGR test after a code clear. Could that be the idle fluctuation?
Normally, the PCM will only allow one EGR Flow Test Count during an ignition cycle. To aid in verifying a repair, the PCM allows twelve EGR Flow Test Counts during the first ignition cycle following a code clear or a battery disconnect. Between nine and twelve EGR Flow Test Counts should be sufficient for the PCM to determine adequate EGR flow and pass the EGR flow test. If the PCM detects an EGR flow error, a DTC will set.
I don't get an EGR error code, only the MAF.
Is the IAC valve suppose to hunt with the key in the on position but engine off?
I checked ground and 12v to MAF sensor and it check good. I haven't checked 5v to MAP and TPS yet.