Son is complaining of low power, poor acceleration, and surging, which I confirmed. Read code P0102. Disconnected the MAF electrical and drivability improved. So, need a new MAF sensor, right?
To test that theory, pulled the MAF sensor from my 99 Grand Prix and installed in the 01 Buick. (RockAuto shows they use the same part number.) But the drivability problem remains...disconnected the MAF sensor and improvement. Go figure.
Put the MAF sensor from the Buick into the Grand Prix and it drove fine, at least for the 5-10 minutes I drove it.
I did not clear the codes at any time. Would that result in the poor drivability in the Buick when installed with the supposedly good MAF sensor? I don't think so.
My thought is a potential wiring problem or something other than the MAF sensor tripping P0102. But if this is the case, why would disconnecting MAF sensor improve drivability?
As always, any help is appreciated.