running problem

[wannabejeep]

My jeep is running like shit. When I start it up you can hold your hand by the tailpipe and feel the exhaust pulsing as it comes out and it will pop out the intake occasionally when under acceleration. Plugs are good, wires are good, cap and rotor are also good. The kicker is, once it warms up and has been at normal temp for like 5 mins of driving, it all goes away and runs fine.

I was dicking around unplugging sensors while it was running to see if any of em changed it. Unplugged the manifold air temp one and it ran worse, unplugged the IAC and it didn't change the way it was running much. I found that to be strange.

My only other guess is the coolant temp sensor. On the renix that controls the amount of fuel the computer sends. I have to bust out the voltmeter tomorrow and see if any sensors are fucked. But does anyone else have an idea of what might cause my issue? If it was just running like shit full time I would guess the dizzy was bad but the issue completely clears up.

sorry for the essay.

[88xjchief]

Good luck on figuring it out.

[XJLI]

www.lunghd.com

every renix problem is there

[Trailer Ray]

i would assume the coolant temp sensor as well. seeing as once it warms up its fine. youre heading in the right direction it sounds.. good luck

[wannabejeep]

checked the coolant temp sensor and the manifold air temp sensor with the multimeter, bother checked out fine, and were doing their jobs. My only other guess is TPS or IAC, then it's goin to the mechanic. I need this bitch to be good to go by september

[wannabejeep]

I put in a new o2 sensor, now it gets to the running better stage faster, but still has the misfire on start up. I'm thinking I have a fuel issue. Going to check that sometime soon.

[CSaddict]

either distro or CPS going bad.

[ninetysix-ex-jay]

Thats def. not a coolant temp sensor. I would pull the plugs again just to see if one is fouled out

[LittleD]

on our chevy we had the same problem, when first started if you tried to accelerate it would pop and bog down for a sec. We replaced the wires, cap, and rotor and it's running like a champ

[wannabejeep]

so i took a ride in my friend's powerstroke today that we KNOW needs injectors, and it runs the exact same way my jeep does. It is seriously identical. Runs like shit on start up same as mine and then as it gets warm it cleans up. Also since most of my friends are mustang guys there happens to be several sets of 5.0 19# injectors laying around which I can pick up to the tune of $20. Anyone think that injectors could cause my issue? It seems like it to me. And even if it doesn't fix it those injectors are an upgrade from stock anywho.

[wannabejeep]

mustang injectors tomorrow.

[wannabejeep]

well it wasn't injectors and the spark is fine so I'm thinking CPS. Dave I hope you are right.

[wannabejeep]

well my jeep is fucked. Low compression on cylinders 1 and two, still has a misfire. But I found that my EGR was messed up and that was causing the stalling issues I've had since I've owned it. So at this point I don't know what I'm gunna do.

[CumminsJeep]

well my jeep is fucked. Low compression on cylinders 1 and two, still has a misfire. But I found that my EGR was messed up and that was causing the stalling issues I've had since I've owned it. So at this point I don't know what I'm gunna do.

pete is selling a motor

[Even]

i've got a 4.0 and AW4 out of a 95ish XJ you can have for dirt cheap

it's been sitting outside for a while though