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Old 02-07-2012, 08:58 PM   #2
N/A all the way
chris_gt_74's Avatar
Join Date: May 2008
Location: Texas
Age: 45
Posts: 527
Vehicle: 2014 Mustang 3.7
chris_gt_74 Gettin' there
Originally Posted by xxallonblack View Post
Hey there guys, I have a 1997 Grand Am GT Coupe with around 153,000 miles on it. We just replaced the Throttle position sensor, Cam shaft position sensor, spark plugs and wires and I am still getting a cylinder misfire error when looking at the check engine log. When accelerating, my car will not pick up and go, but slowly accelerate.

Also, at around 55 mph, I will have my gas pedal steady or even using my cruise control.. but the RPM's will drop from around 2,000 down to 1,500. I will let off the gas and it will jump back up to 2,000 RPM's. Has anyone ever experienced something like this?? It was idling around 3,500 to 4,000 RPM until we changed the spark plugs and now it idles fine. Please let me know if you have any other questions about the car for diagnostic purposes!!!
Is it consistently the same cylinder that's misfiring or more than one? What plugs did you put in?
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