yellowxj
NAXJA Forum User
- Location
- Ocala, FL.
My 97 4.0 aw4 xj problem. Just swapped in a newish motor. Ran great for the drive to the detail shop. As it got warmed up good on the way home it started losing power, popping through the intake a little if you tried to gas it hard. Fuel pressure is at about 50. Air filter is new. Have good spark even when its losing power. Cat seems to be breathing all right. Unplugged the TPS and it revved higher but stopped the problem. So I got a new TPS and took off down the road again. Took longer but started the same game again. I unplugged the TPS and it pretty much drives fine. No check engine lights are on. Scanners not picking up anything. The TPS is fixing the symtoms of the problem but not the problem itself? Anyone experienced something like this? I guess there could be a problem in the TPS plug??? corrosion????water from the pressure washing??? I've taken it apart a few times but cant visually see a problem. I'll spray it with some electrical cleaner spray and see if that helps.