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Rpm's fluctuating between 3rd and overdrive

L

lamonicas

New member
My 2008 GXP seems to be going in and out of overdrive when I am driving at a steady speed. I watch the tach and it goes up and down about 200-300 rpms. Any help would be greatly appreciated.
Thanks
 


Check your TPS sensor. I had the same problem about a year ago. Started with that and then progressively got terrible.
 
Did you ever figure out a solution to the problem? My 2004 GP GT is doing the same exact thing. It's when I'm driving at a steady speed usually around 50-60 mph or when LIGHTLY accelerating. When I floor it, it has a little less power than usual, but it doesn't sputter at all. I JUST replaced my plugs and wires and it still does the same thing. I've heard everything from torque converter to plugged catalytic converter to ignition coils. Has anyone actually solved the issue?
 
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