3800 V6 Acceleration issue.

Feb 24, 2008 3 Replies
B

I have a 2002 Pontiac Grand Prix GT. I have an issue with the car not accelerating. It will slowly go up to 4000rpm and stick. If I let off the gas completely, it will downshift, and then I can slowly go up to



4000 in the next gear, ect...

I am pulling a low voltage to MAF/VAF code. I have tried swapping out the fuel pump, MAF, TPS, and temp sensor with known good ones as well as whatever pressure sensor is located on the left side of the intake. Fuel filter was replaced. Any ideas?



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W

Get a voltmeter and trace the voltage to the sensor. You probably have a corroded or loose connector. Swapping parts without doing the diagnosis is a waste of time and expensive.

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C

Make sure you don't have an exhaust system restricition (cat, pipes, muffler, etc).

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