UK Car Repair Questions? Ask a Mechanic for Answers ASAP
Hello and welcome to just answer. This is either a failing throttle body or the APPS (pedal position sensor). Do you have access to a scan tool that will read real time sensor data? If so, then we can determine if it is the APPS or the throttle body. Let me know if you have or can get/rent one.
The TPS is the throttle position sensor inside of the throttle body. The APPS is the sensor on the gas pedal. When you step on the gas pedal, that sensor tells the PCM (engine computer) where you have the gas pedal. Then the PCM sends a signal to the motor in the throttle body which moves the throttle plate. Then the TPS monitors the position of the throttle plate and sends that iinfo back to the PCM. Based on your symtom, it is probably the APPS, but watch that voltage signal while stepping and releasing the pedal. If it follows your fott movement exactly with no lagging, then the APPS is good. I hope that makes sense,
Could be the throttle body motor, if so replace the complete throttle body.
That sounds like a good plan. If it only happens when hot, then it is probably the throttle body.
Sounds good my friend! Merry Christmas to you and your family!!
Hmmmm, you may need to have a shop perform a throttle body relearn procedure on the new throttle body. That will require a scan tool that will force the PCM to learn the voltage values of the new throttle body.
Yes. If the PCM does not know the voltage limits/values of the new throttle body, then it cannot set the cruise control requested speed. A PCM reset may or may not help. Try it first though.
Yes I can find it. And it is part of the pedal assembly. I will look it up and get back to you.
Please send me the Jeep's VIN number so I can look up the correct APPS part number.
Ok, thanks. Based on your VIN number the part number is ***** That is for a Grand Cherokee 5.7 with non adjustable pedals.
I hope this helps, and if I have been helpful, would you kindly take a moment to rate my service today?
Let me check.
Ok, yes that part number will work, it has been superceded from the one I gave you.