Quote:
Originally Posted by biosurfer1
wayner, that concerned me too but the Buick forums say you'll have leaking and very rough running before that failure. More of a progressive failure...so I can't rule it out, but it's doubtful. My guess is still O2 sensor.
It's the 3.1 V6
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On my 3.8 Series 2, the UIM and LIM gaskets were getting boost blow by for 6 months before I changed it (would have done it sooner if i knew extent of issue) but the car still ran like a beast. It has to be really gone to make a running issue.
I'd make 2 purchases equal to the cost of and say screw the diagnosis:
-Can of CRC MAF Cleaner, followed by liberal dousing.
-1 Oxy Sensor.
If that doesn't do the trick EFF IT.
If you're bent about the diagnosis charge and get a PO171 (system lean on Bank 1 (or 2 for that matter)) code, your first place to start is MAF, o2 and then chasing vac leaks...never mind getting the IM gaskets changed. No way.
Schiut man it's a '95 BUI, the CEL is part of the allure...
