Victor68

Does the ECU need to be reset after it goes into limp mode. Had engine fixed but still having acceleration problems! changed throttle position sensor, but still have a bit of a rough idle and hesitation when i give it hard acceleration. I notice the hesitation more when I'm on the highway. Does my year cherokee have a Accelerator pedal position Sensor?? Also my cruise control stopped working, So I changed the clock spring, but that did not fix the issue. any ideas?

00t444e

There is no limp mode that I am aware of, what codes are you getting?

Very Red XJ

This is my drill, because I'm bad at guessing - get your shop manual. Assuming your air filter is clean, spark plugs, cap & rotor and wires are good, check for dangling wires grounding. The wires coming up from the O2 to the fuel rail wiring harness are a good place to start. Then open your shop manual and test your sensors: the temp sensor, idle solenoid, MAP and O2. Note: O2's are on the maintance schedule for good reason. In my experience, the crank position sensor is good - or you stranded by the side of the road - but test it anyway. If they are good and your throttle body is clean, move to the injectors: clean them and test the resistance for each one. You can pull them and usie a 9v battery to produce a click unless it's defective.

The pins are for the wires

Testing restance in cleaned injectors