Hello. I have an 01 Cherokee Xj sport (4.0) with some starting and idling issues. They are intermittent but always seem to present when my daughter has the car at school and it has sat for 6+ hours. When it happens I can usually coax the car to start but it will stall without using the gas pedal.
I recently replaced the oil cap which got rid of the check engine light but then this issue presented the following day. The car is reluctant to start but will if given some gas but doesn’t want to idle initially. It usually clears up and runs and restarts fine but not always. I replaced the idle control valve and have ordered a TPS. I searched and saw the fuel pump check valve can be a culprit but that’s not an easy fix from what I see.
Curiously, there is a gray plug towards the front of the manifold but I have searched and been in the Haynes manual and can’t determine what it is. (temp sensor??) unplugging it triggers a check engine but seems to solve the idle issue.
Any thoughts appreciated.
I recently replaced the oil cap which got rid of the check engine light but then this issue presented the following day. The car is reluctant to start but will if given some gas but doesn’t want to idle initially. It usually clears up and runs and restarts fine but not always. I replaced the idle control valve and have ordered a TPS. I searched and saw the fuel pump check valve can be a culprit but that’s not an easy fix from what I see.
Curiously, there is a gray plug towards the front of the manifold but I have searched and been in the Haynes manual and can’t determine what it is. (temp sensor??) unplugging it triggers a check engine but seems to solve the idle issue.
Any thoughts appreciated.