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2001 Pontiac Grand Am Cylinder 1 Misfire
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GenQuake99
New User
Oct 5, 2011, 9:58 PM
Post #1 of 4
(5541 views)
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2001 Pontiac Grand Am Cylinder 1 Misfire
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2001
Pontiac
Grand Am
2.4L
CPU errors are pointing out to a misfire on Cylinder 1, as well as a miniscule fuel emission vapor leak.
The issue started when the engine started adding a bit more rpms than normal to the point that I was speeding up faster than I should of been. On start, it would sound as if it were running at higher RPMs than normal while in park. It has also been known to idle at 47mph going down the road with foot off the gas with no sign of deceleration on a level road, and a few times it's accelerated on it's own on similar situations. At one point, the catylic Converter had to be replaced, and the mechanic said the inside was melted.
So far I've tried replacing vacuum hoses in case of leaks. One vacuum hose air sensor. Spark Plugs, Spark Plug Wires, and the block that the spark plug wires plug onto. I also replace a leaking exhaust hose, and soon to replace a leaking exhause flex hose.
After tune up and catylic converter was replaced, it ran fine for about a month. Now the idling at 47mph, and idling at 2000rpms in park at start up is popping up again. What other things can I look at?
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Hammer Time
Ultimate Carjunky
/ Moderator
Oct 6, 2011, 3:24 AM
Post #2 of 4
(5507 views)
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Re: 2001 Pontiac Grand Am Cylinder 1 Misfire
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It sounds like you have more than one issue. For the misfire problem, I would replace the white plastic coil housing. They crack just like a distributor cap in places that you can't see.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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eddiebonds245
New User
Apr 1, 2013, 12:05 PM
Post #3 of 4
(3777 views)
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Re: 2001 Pontiac Grand Am Cylinder 1 Misfire
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i have had the same issue just recentlly. new plugs,boots,houseing,coilpacks,fuel filter. i am getting plenty of fuel but only hitting on 2 cyl. i know its not the fuel pump. i am running out of possibltys please help.
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 1, 2013, 1:05 PM
Post #4 of 4
(3770 views)
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Re: 2001 Pontiac Grand Am Cylinder 1 Misfire
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This thread is a year and a half old. Please read the FORUM RULES before posting
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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