tps problems .86 v to 2.79 3% to 56% tp%
12-13-2009, 12:38 AM
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tps problems .86 v to 2.79 3% to 56% tp% Strange strange things....
tps reads, .86 v to .94 at idle no matter what I do. I tried resetting it 20 times. At one point it even read .86 and 24-25% tps %. The .86 v at idle has been constant but the tps % has varied, but never below 2 or 3%. Reset it and it does not change.
I had an o2 unplugged at one point , and thats when the tps% went to 24%, but the volts were constant still at .86.
I even tried a known good tps from another car, same, even scanned it on the other car first, .56 to 4.5 on it, but .86 to 2.79 on mine.
Tried a third tps also, same. I even tried elongating the mounting holes and removing the tang on the sensor, still no change, I cant get it below .86v. at idle or above 2.79 at wot.
Any ideas........Im gonna try a pcm tomarrow
tps reads, .86 v to .94 at idle no matter what I do. I tried resetting it 20 times. At one point it even read .86 and 24-25% tps %. The .86 v at idle has been constant but the tps % has varied, but never below 2 or 3%. Reset it and it does not change.
I had an o2 unplugged at one point , and thats when the tps% went to 24%, but the volts were constant still at .86.
I even tried a known good tps from another car, same, even scanned it on the other car first, .56 to 4.5 on it, but .86 to 2.79 on mine.
Tried a third tps also, same. I even tried elongating the mounting holes and removing the tang on the sensor, still no change, I cant get it below .86v. at idle or above 2.79 at wot.
Any ideas........Im gonna try a pcm tomarrow
12-13-2009, 11:04 AM
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I checked for 5v, and found 4.99-5.00 in either start or while running. I added a ground directly to the battery, no change.
I checked the blue wire at the connector and pcm, same ......and its a brand new harness.
If I pull the sensor off, I can manually turn it till I get either 0 or 100%....but when I pulled one off a running car, hat was scanned prior to pulling it, it was the same, .86 to 2.80.....
I checked the blue wire at the connector and pcm, same ......and its a brand new harness.
If I pull the sensor off, I can manually turn it till I get either 0 or 100%....but when I pulled one off a running car, hat was scanned prior to pulling it, it was the same, .86 to 2.80.....
07-23-2010, 09:45 AM
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Just did another post. I had a similiar problem where the TPS seemed to be fine until the car got warm then it started jumping and went to about 14%. This was at idle and it would start surging. I replaced the TPS and the problems went away. A simple test is to just let the car idle and if it starts jumping just unplug the sensor. It should drop right down to 0% and behave. Plug it back in and see if it happens again.
