Question about 1999 Buick Regal
My wifes vehicle did that for about a year in hot weather also.
It was giving PCV valve codes, misfire coded, but finally after her insisting I was wrong, I replaced the fuel pump and fuel filter and it has been running fine ever since.
it would run great when it was cool, then when the outside temp rose into the 80s and 90s it would run about 30-40 minutes and just shut down. Let is set, it would run another half hour or so.
Yeah I understand your frustration, its hard to determine also , even with a gauge by the time you get things disconnected and hooked up, it checks out fine.
Posted on Jul 20, 2008
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Posted on Jan 02, 2017
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The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type. You can run a trouble code test by using the instructions at this website
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