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01-25-2011
i have a 2000 grandprix gt with a 3.8. It has a miss at 2000rpm in lockup when accelerating lightly. i can watch all the cylinders missfiring on my scanner while driving. It goes away when you kick it down. the plugs and wires have been done as well as a ignition module. i was thinking it could be crank sensor but not sure. the tcc duty cycle % changes when miss occures but not sure if its related. no codes. need some sugestions.
01-25-2011
what gear does it do this in?
01-25-2011
4th in lock up
01-25-2011
probably your tcc solenoid...mine does the same thing intermittently. FWIW leaving the car with the battery disconnected has helped others. Helped mine for about a week then started doing it again.
01-26-2011
how is it missing? can you feel it or just random misses? is the tcc lockup changing drastically?
01-26-2011
it is a steady miss untill you kick it down or let off throttle. you can feel it. when its missing the tcc duty cycle is drastically changing. the transmission fluid is a bit dirty but i dont see why the tcc slipping would give a misfire count
01-26-2011
mine does the same thing....jumps a good 500 rpms. Give it enough throttle for it to kick down a gear and it goes away immediately like it never happened.
01-26-2011
let completely off the throttle, then ease back into it. won't do it anymore.
01-27-2011
is that the fix? what is causing the miss?
01-27-2011
the tcc solenoid malfunctioning i believe
01-27-2011
or push the lockup way out so it never locks up. you'll get worse mileage, but it won't do it anymore.
01-27-2011
wouldnt there be a code? why am i getting misfire counts on my scanner
01-27-2011
ive never gotten a code with mine. how many miles on your car. you can maybe try replacing the crank sensor....mine needed one...didn't throw a code for it either.
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