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Engine trouble with a 1997 pontiac grandprix
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alkigreen
New User
Jan 8, 2010, 10:56 PM
Post #1 of 2
(1242 views)
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Engine trouble with a 1997 pontiac grandprix
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so i have had this Pontiac grand prix LX for a while now and i knew when i bought it, it had an issue with, what the previous owner said was the EGR valve. since then i replace the spark plugs, spark plug wires, o2 sensor, coils, injectors, fuel filter, basically the entire top end.. and the EGR valve.. didnt fix it.. the issue is that when i hit about 2500 rpm the engine lugs out and again at 4500 rpm and up. it also idles rough. i have no idea whats wrong with it and dont know where to go from here.. im not to oriented with cars and just want to get it fixed.
(This post was edited by alkigreen on Jan 8, 2010, 10:58 PM)
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cewjoe71
Novice
Jan 9, 2010, 10:27 PM
Post #2 of 2
(1235 views)
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Re: Engine trouble with a 1997 pontiac grandprix
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Check the throttle posission sensor. Maybe mass airflow sensor.
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