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Idling fast and shutting off when stopping

B

busta191

Member
Just filled up the tank and headed home when the car started acting funny. My 99 n/a rpm's went way up and didn't want to shift and when I stopped the car shut off. It started right away and I limped home. I got home and checked for codes and pulled up a couple. Got a p1635, p0123 and p1133. Any ideas?
 


Been fighting the O2 codes for a while. Changed the O2 sensor a couple of times and with different brands, but no luck. The TPS code is new.
 


Well, the shop replaced the ECM and the TPS and that seems to have done the trick. They said the TPS shorted out causing a short in the ECM.
 


I've had tps issues before and it does funky stuff to the driveability of the car. what would happen to me is that the car would downshift under a medium to heavy load and wouldn't upshift. a couple times I would be driving up a hill at a 6% grade and the car would downshift to 2nd and would stay there even if I let off the throttle or floored the accelerator. going up a mountain in 2nd gear at 6000 rpm sounds awesome, but unnerving at the same time.
 
It probably was good. Most of the time when a tps goes bad it gets bad spots in it, like areas that don't conduct so it gets what we call scratchy. It comes from the old radios where you would turn the volume up and it would make crackling sounds. You can typically see it with an Analog meter that uses a needle, or a decent digital meter with a bar on the display. When you ohm the sensor out you can watch the signal wire open then drop or rise back as you get past the bad spot or spots.

Jeff
 


This might sound odd but is your cigarette lighter fuse blown? I ask because whenever my cigarette lighter fuse blew, it would trip a code for the downstream o2 and say the o2 was faulty. I went through hell doing diagnostics and using schematics on Alldata repair to fix this.
My GP was a 97 but IDK if the wiring is the same.
 
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