My xj is the notorious '96. I have a TPS code. Steady misfire at idle. Bad fuel mileage, reduced power. It sat in a field for 10+ years, rhd, I have 10k on the odo since begining restoration. I've viewed the charts/did my probing/research and this is what I'm coming up with.
Key on main power wire: 5.39 V
Key off main power wire: 0.39 V
Key on signal wire: 5.24 V
Key off signal wire: 0.32 V
Ground wire is, well, grounded soundly according to the meter.
If you put the probes in the following positions:
Black on ground directly on battery
Red on LITERALLY ANY OF THE THREE:
13.23V on all THREE.
Tps unplugged, connector will show 0 resistance between all three wires.
I'm confused. Short? Ecm? What?
I still drive it. Everyday. 150+ miles per day. Abuse. Beat on it like a red headed step child. Stop and go without being shut off for 4-10 hours per day, WITHOUT ever being shut off. Pulling cars and a trailer, and 4 wheeling on the river bed/trails on the weekend. Misfire or not. It has assignments and will finish it. Misfire at idle only. Can't tell in the driving range. Only at idle. TPS code always. It has been replaced twice with no improvement. Ecm "reset" multiple times. Any suggestions?
Key on main power wire: 5.39 V
Key off main power wire: 0.39 V
Key on signal wire: 5.24 V
Key off signal wire: 0.32 V
Ground wire is, well, grounded soundly according to the meter.
If you put the probes in the following positions:
Black on ground directly on battery
Red on LITERALLY ANY OF THE THREE:
13.23V on all THREE.
Tps unplugged, connector will show 0 resistance between all three wires.
I'm confused. Short? Ecm? What?
I still drive it. Everyday. 150+ miles per day. Abuse. Beat on it like a red headed step child. Stop and go without being shut off for 4-10 hours per day, WITHOUT ever being shut off. Pulling cars and a trailer, and 4 wheeling on the river bed/trails on the weekend. Misfire or not. It has assignments and will finish it. Misfire at idle only. Can't tell in the driving range. Only at idle. TPS code always. It has been replaced twice with no improvement. Ecm "reset" multiple times. Any suggestions?