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Well i guess i can say that i have no more problems with my jeep. I found a deal i couldnt pass up. I ended up tradeing it for a 98 subaru impreza. Not to worry i will be getting another jeep sometime in the future.

I believe it may be a sticking valve because it is real bad sometimes and other times very little. Always on #2 cylinder though. Just a thought

I have a 92 xj 4.0 I have had a misfire problem for a while. I have tried to troubleshoot this issue with no luck. I have narrowed it down to cylinder #2 that is misfireing. I have put in new cap/rotor/wires/plugs and a new set of injectors. Also has new fuel pump and filter. The fuel...

The injectors wont work if the plug on top of them is disconnected. Try checking for spark cause it sounds like its getting fuel.

I think it may be a clogging injector. If i floor it for a sec it will clear up for a few minutes then go right back to it. I put some more Techron in it. See if that helps. Is there any way to take them out and clean them? I know i should replace but i have a real tight budget. I am going...

I have come across a new problem with my 92 4.0 cherokee. It has been intermittently idleing rough. Sounds a lot like a misfire. You can hear it through the exhaust. Probly been about a week since it started. Have been tring to diagnose with no luck. Currently has new...

I dont know if it is true but i read on another thread somewhere that if the cruise control doesnt work and it shifts to overdrive excessively to replace the brake switch?

Finally some results!!! I replaced the fuel pump today and EUREKA!! it runs like a champ. Much praise to the guy who designed the tank so you dont have to remove it to get to the pump. Also thanks to you SteelHeadz for helpin me out you are a great resourse, thanks again.

Pressure at idle was about 31 psi. I checked the regulator by unplugin the vaccum to it and it jumped up about 10 psi which is right by the book. So that is good so its probly the pump

I broke down and got a fuel pressure gauge. Turns out its losing pressure after being turned off. It drops off all the way to zero. That means the fuel pump is bad i think.

I dont think i have an EGR on my Heep

I have cleaned the IAC and throttle bodyto no avail still. i also tried unplugging the O2 sensor and it ran even worse. Everything seems to check out with testing sensors and whatnot. The only thing i havent checked is fuel pressure cuz i cant afford to buy a gauge right now. no one close by...

Yeah they are i checked it by the repair manual.

Yeah the plugs/wires/filters/cap/rotor and such is all new. maybe a fuel pressure issue? gonna try cleaning the IAC and see if that helps

Thanks man i will try cleaning the IAC and throttle body and see if that works.

This problem has ben hagging me out for quite a while now. I have a 92 XJ cherokee with the 4.0 I have been getting about 6-7 MPG which is terrible even for a jeep. Also when idleing it runs slightly rough almost seems like its getting too much or not enough fuel. As soon as the gas is pushed...

Thanks i didnt think it could be as simple as just taking them off.

I have a simalar problem but it only happens when the fuel is below a half tank.

I am going to replace my rocker arms soon on my 92 xj 4.0 I have a repair book but it isnt very detailed. It says to put #1 cylinder to Top Dead Center and then remove the rockers a 1/4 turn at a time. Can you then just take out the rest or do you have to put #2 to TDC to get those out and...