Dietrich Breeden

I'm having trouble with my 4.0 bucking and losing power when accelerating, have installed new cam and crank sensors and cleared CEL , still having the same problem. Any help would be appreciated

Dumajones

welcome to Cherokee forum.

some reading

https://www.cherokeeforum.com/f2/rou...-p1391-124396/


and vid about code how to fix.k



did you replace with OEM products? or Napa?

Dietrich Breeden

crank sensor is from Napa, cam sensor is from autozone

jordan96xj

The long story short, is that those 2 sensors in particular are some of the hardest for low-cost aftermarket suppliers to get right. They produce an analog signal based on voltage, and if the signal is not correct across a variety of RPMs the computer will start to have problems interpreting what it is receiving from them. It is common for them to go in and work at startup, but present issues as the RPMs increase. The aftermarket suppliers often have to reverse engineer the OEM sensor and try to match its voltage signature as close as possible, on top of this, they want to use that outcome across several variants of the sensor to fit the widest range of vehicles/applications possible. But the computer is pretty picky about what it can interpret (think of it as the computer tuning in a radio station, and the signal not being good).

tjwalker

Also......keep in mind when troubleshooting that the code refers to the entire "circuit", not simply the sensor itself.

Which means it could be something as simple as a bent pin inside of the sensor connector or a wiring problem anywhere between the sensor and the computer.