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Car acts like its missing and its not!!!

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djmack7

New member
Got valve covers changed on my 2004 Grand Prix GTP. Ever since, my car hesitates at idle and in drive. I thought maybe the car was missing. The rpm guage jumps back and forth and car eventually shuts off. But I can keep starting the car and drive it around the nieghbor and eventually it will run fine like nothing was wrong. Took car to dealer and they suggested changing O2 Sensor, Crank Position Sensor, & Fuel Pump. I changed them all and the car still runs the same. I even changed the tempature control sensor and no luck. Has anyone had these problems before or does anyone know what the problem with my car may be?
 


Pull off your throttle body and clean it. I bet thats the issue...its common with the '04+ cars.
 
yes those throtle bodies on those....drive by wire throttle bodies do get sirty and cause issues. i would assume that something maybe got pinched in the valve cover job, or something is not plugged in..maybe vacuum? is there an engine light??
 
Get you a cheap can of carb cleaner and start spraying your all around your LIM and vacuum lines while the car is running, if the car tries to die when you hit a specific area.. as brad said vacuum leak.
 


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