Question about 2002 Pontiac Grand Prix

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Engine produces little power on acceleration and difficult to achieve over 60 kilometers per hour. Flutters a bit on accelerations

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1st question - when was last tune up? Plugs, wires, cap, rotor, all fluids & filters including fuel filter. I'd start there and run a good fuel system cleaner through it. Another thing to watch for that Pontiacs are notorious for is timing chain & gears going bad. Right about 70k-90k you're in the "dark zone" and they give little or no warning. You might consider changing them out also.

Posted on Mar 24, 2011

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Posted on Jan 02, 2017

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2001 Mazda MPV, 2.5L eng. During accelerating on to highway, van lost power. Van continued to operate but with little power available. I have no engine light and my code "checker" shows PASS (no...


looks like not enough fuel pressure, check the fuel filter.
and the fuel pump pressure.with car running 60 psi
the pump is located at the rear seat driver side you have to remove the carpet to access the cover. if the fuel pressure checked "OK" suspect defective maf sensor (sometimes defective maf sensor do not show errors codes)another way to test is disconecting the maf sensor and start the car (computer goes to limp in mode) and works little better,or check by scanner idle= low grams per seconds and increase when accelerate.

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