Jaguar Repair Problems? Ask a Jaguar Repairs Expert.
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.Rough idle can be cause by a few things, one common cause can be an engine vacuum leak so I would start with checking in and around the intake area for any signs of a leak. If its leaking this can also cause the RPM to raise as well. Take some carb cleaner and carefully spray short burst in and around the intake area and see if there is any change in the RPM. If so that would indicate you have a leak. I would also scan the computer system and see if there any fault codes setting. Check this for me and post back with the results and we can work from there.