Whats up, so long story short, blew radiator hose and then jeep over heated and blew head gasket.

I replaced the head gasket, intake/exhaust gasket, and valve cover gasket.

After that the jeep runs really weird, when its in park its fine, and when im driving its fine but when I am at idle its runs at like 200RPM.

I replaced fuel injectors, distributor cap and rotar, plugs, wires, still nothing.

Currently I got a couple zip ties behind my pedal on the cable to make it run little bit higher idle but is there anything i can do?

 

Weird.. I doubt it, but the IAC or TPS maybe?

 

Whats IAC? And we tested OHMs on the TPS and its all good there.

 

Iac-idle air control the valve pretty sure right off to the left of your throttle body

I gotta change mine to its giving me s**t

 

How can i tell if its bad?

 

****ty idles one sign but testing it will be really the only way

 

Gotta link or a tutorial on how to test it?

 

make sure you dont have any vacuum leaks as well.

 

I would lean towards a vacuum leak first. The IAC is located right by your tps on the throttle body. It can often get coated with the same gunk covering your tb, so if your tb is really dirty, there is a good chance your IAC is dirty. Most of the time, you can unhook the wire, take the 2 screws out holding it in, pull it out, and clean off the head. I also took q-tips and cleaned out the socket the IAC came from because it was very dirty also. Takes like 30 minutes to do and it can't hurt.

 

what year xj??????

 

x2^^^^^^First step

 

renix and non hohttp://www.lunghd.com/Tech_Articles/...iagnostics.htm

 

another link herehttp://www.jeep4x4center.com/knowledge-base/index.htm

 

I was having some crazy idle on mine also. I cleaned the IAC with some carb cleaner, and also checked my vac lines. I had both a dirty iac and a vac line that had come off. Idles fine now.

 

It's a hard thing to tell you can take it out spray that and your throttle body and the Iac connection down with cleaner or save up 75 bucks and just replace it chances are a new one is probably best and vacuum lines could be it but from my understanding they can be a hassle to check that's why I haven't done it yet I'm just gonna try the new part bc I cleaned my all up and still gives me ****.
Good luck!