There's a test for that.

 

At this point I would wager on a vacuum leak. Get a vacuum test gauge and test. Should be 10-15 hg at cold start and 15-20 hg at warm idle.

Whats the fuel pressure now?

When was the last ignition tune up?

 

guess ill go rent a vacuum gauge, where do i hook it up at?
fuel pressure went from 20 to 31 psi
it has brand new spark plugs, with the rotor and cap cleaned. same wires on it when i bought it.
could the egr valve cause idle issues if clogged up or not functioning properly?

 

when i pulled fuel pressure regulator vacuum line it did not change the fuel pressure when i had a gauge hooked up to it, possible issue?

 

A plugged cat will affect power more than idle. By the time it's plugged enough to not let the engine idle it would have almost no power.

 

great so i can check that off cause it has plenty of power, shifts well with no misses. just when its in park or at stops the idle plummets on me

 

im gunna spray brake cleaner over all the vac lines to check for leaks, run the motor with the egr valve pulled off to see if that changes the idle, replace wires with a like new set i have layin around and see what i come up with tonight. will update after that!

 

Thinking the plunger for the get is sticky after playing with it I noticed a difference in idle, is there a delete plate for it? Or would it run better with replacing then deleting it?

 

Replace it............

 

Do not use brake clean to check for vacuum leaks! It's not effective and can damage stuff, but more important breathing burnt brake clean can kill you.

 

You could try cleaning it.

 

was looking online and came across a 92 cherokee with a bad motor. will that 2wd trans bolt right up now problems orelated am I going to run it to problems? like different gearing, output shafts splines, TCU, etc...

 

Your post isn't very clear, but if you're asking if you can use a 2wd trans in a 4wd, the answer is no.

 

if meant to post this in my own thread but clicked the wrong reply button and it put it on this thread lol. I have a 2wd 96 with a bad trans and I'm looking for another. but I found a 92 and donot know if it'll work. need my jeep back already.