hi guys new member here and I'm happy to say my 1997 Xj has 300k miles and I'm starting to have issues that I expected to have one day. I broke down a while back got towed ect. My distributor went ok so I replaced it set it at TDC. So my Idle was erratic and after getting shafted by a few mechanics sensors were changed, ignition harness was changed, and my truck continued to run like S--T. Then suddenly she started to backfire as if off timiing. Suddenly there was no spark to get started, Got shafted yet again by a so called short specialist. No short was found. I towed my truck away because I got no answer to my problem. I asked another XJ owner for his opinion. He told me it could very well be my ECU. So I went and bought a refurbished plug and play unit with a lifetime warranty and I installed it. To my surprise my truck started right up. But the Idle started to rise just over 1 thousand RPM. That Idle is too high. Can anyone give me some advice here This XJ is my BABY I have alot of money invested in her and she has been great to me for 18 years. I just want 1 more year. What can I do? is it the ECU? does it need to be reprogramed? I appreciate this site for letting me post my problem here. But most of all I appreciate the members who take the time to read my post and give this old fellow XJ owner some help. Thank you
