jeepnleo

Ok so this just started.

It takes me about 5 minutes or more to strat my jeep.

I can drive it anywhere once started.

Now after starting it if I let it idle for more then 15 minutes it will begin to lose power and die.

If I give it gas as it starts to die it will go for awhile longer.

Its a stock 90 4.0l renix. Aw4 transmission.

Has custom intake.

I have replaced tps about 4 months ago if not longer.

What do I do what do I check?

radio flyer

cat is what it sounds like

jeepnleo

Cat? The converter?

How is that an issue.

Unless it went bad in less then a month I had that torn out when wheeling. The exhuast shop said it was a little dirty ut can still see through the honeycomb.

jeepnleo

Cat? The converter?

How is that an issue.

Unless it went bad in less then a month I had that torn out when wheeling. The exhuast shop said it was a little dirty ut can still see through the honeycomb.

radio flyer

Catalytic converters tend to be good or bad! They also tend to go bad without any warning. A free test would be to unbolt it, and run your xj. If the problem goes away or at least gets much better- chances are it's the cat. Good luck with gettin it unbolted, it can be done with time and determination!

jeepjeep90

HEAT the fasteners before you try they are more than likely rusted solid i cheat and use a cutting torch and get it glowing real good and i take it off while its still red it comes off like its brand new (just did my cat same issue)

fantic238

Check your EGR as well, unplug the EGR vacuum hose and close it.
Check your fuel pressure.

jeepjeep90

im having other issues as well what could the egr cause?

fantic238

The egr is a quite usless device and is supposed to open only at high rpms, if it opens at idle it will cause rough idle, engine dying and the engine won't start immediately.
It's simple to check anyways, unless you live in California just close the main vacuum hose with a bearing ball and that's it.
It could be bad fuel pressure as well.
Did you replace your fuel filter recently? How's the FP sounding?
Vacuum to the fuel pressure regulator?
Ah, very important:
Check the vacuum line to the map sensor as well.

jeepjeep90

i have no vacuum to the map sensor at an idle i have vac to the fuel pressure reg and i just got this things and it seems to have every problem on this whole forum lol

fantic238

There you are, vacuum to the map sensor. Find the leak. Check the rubber thingy in the throttle body where the line exits.

jeepjeep90

this could be part of the problem in my other thread you have been helping me with