So I bought an XJ with 336K Miles on it. It is in amazing shape and I got it for $800. Obviously it has had a few issues but nothing that I haven't been able to work out. Except for one; I have been having an issue where Monica (that's her name, lol) will not start right away and will idle extremely low if I decelerate or stop. I have replaced the TPS, IAC, and ECU entirely in order to fix this; none of which have worked. I also reset the TV Cable every time this happens and it sometimes work but often doesn't: I have to pull the TV Cable to its full throw in order to idle at a normal, healthy 750RPM, but it only stays like this for a short period of time. Today, after a lot of looking, I replaced the distributor, the cap and the rotor press button. It was fixed! Eureka! Drove it to work, felt brand new, I was stoked! However, after work, I began to have the same problems. I don't know what to do and *ANY* advice is appreciated! Thanks!!!

-A desperate Jeeper.

 

I should also mention- both O2 sensors are disconnected currently as they were blowing a 30A fuse and I have yet to fix them. Not sure if this is affecting it.

 

Welcome to the forum

Cleaned the throttle body and plate yet?

 

Yep. Cleaned the whole area w carb cleaner.

 

Does it always do it? Or only when cold (the long start up)
Have checked fuel pressure?

 

Front 02 sensor is a distinct possibility. Goes to idle quality.

 

It is on both w cold start and sometimes when driving. Warm start isn't as bad but it's not great. I tried extending TV cable to full throw again but that did nothing. Going to try O2 sensors before work.

 

The elephant in this room is unplugged oxygen sensors.

 

I fixed and plugged up both O2 sensors and she started up and idled fine in the driveway. I am gonna go for a drive in just a little while and let y'all know how she does.

 

what does "fixed and plugged up" mean?

 

I had to rewire one of the harnesses that melted against the exhaust manifold, that's why they were unplugged because I just didn't wanna do it lol. Anyway, they are both functional as far as I can tell and I took it around for a bit and still had a slight issue with low idle but it's not stalling anymore so... good news(?) I guess? I may try seafoaming her in the morning too to see how that goes.

 

Sometimes just driving it sorts it out after the repair. Any check engine lights?

 

Never had the light turn on. Have yet to check to see if it's throwing codes. I'll check for that in the morning too I suppose.