Question about 1997 Buick.5 Regal

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Engine light on, bad fuel milage

Had a former GM tech get codes, mass air flow sensor and #6 cyl miss fire. Replaced the plugs and wires, didnt help. Engine starts skiping @ 4000 rpm feels like a rev limitor but not all the time. Bad fuel milage and loss of power. Has a 3800 supercharged engine

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You didn't mention if you replaced the mass air flow sensor, if the tech got that code, it needs replacing, if you haven't alresdy done so.

Posted on Feb 25, 2009

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1. one of the coils may not be firing.
2. the ignition module could be bad.
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4. if the car is equiped with a map sensor it could do the same as a mass air flow sensor.
5. fuel pressure regulator could be leaking at vacuum port drawing in more fuel than needed.
6. the computer itself could be bad as well.

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