ok this is what is going on I will turn the jeep over and it will start and run for a few seconds that quit. I can fluter the gas pedal and keep it running for a little bit than it will stall. I have installed a new crank position sensor and cap rotor plugs and wires. I have checked the camshaft position semsor and the throttle position sensor abd they check out with in spec. I also changed the fuel filter, well over due, if I unhook the neg. batt cable and let the putor reset it is good for a few days then starts all over again. the putor was replaces about three years ago and I am hopeing that that is not the problem. I have done a search here and on other web sites but no one seems to have the right answer and have check the ones that have been brought up. sorry I do not have a scanner

 

IAC valve?

 

It's your pvc hose that hookes into the valve cover the rear one

 

IAC or TPS. A vacuum line shouldn't keep a truck from running. It may run like crap, but it should still run.

 

http://www.filestube.com/537d2723635...ual-84-93.html

 

Yes it will it won't idles right and shut off

 

sounds like a bad conection. check your batery conections. not just at the batery, all of them. clean the terminals, and mating surfaces where the other ends of the batery cables atatch to the ground, and starter.

 

[facepalm]

 

I cleaned the IAC valve today ok it runs a little longer not much sorry done guessing I have a freind that is bring his scanner over tommorow I will keep you all updated.

 

ok hooked it up to my friends scanner last and all electrical componants are working great other that it said it had no gas after it was fired up. went out and got my fuel pressure checker from the shop and when you flip the key it has 39 psi and did all the checks for the regulator all is good, untill you start the engine and the fuel pressure drops of to nothing. does this mean the pump is bad or is all the pressure going out the the regulator as it did on my bronco?

 

ok got a fuel pressure checker and check the fuel pressure and it had great pressure until you fired it up once running the fuel pressure would drop off. ok so I replaced the fuel pump in the jeep. well I fired it up in the garage and it did not stall, and did not teat drive it like I normally would. well went out next morning and started it and pulled it of the garage and it stalled. well at this point I did not know what was wrong so I got on the internent and looked up stalling problems with the cherokees of my year. comes down to it being a bad ballast resistor, I jumped it out and it run's great now

 

clogged fuel filter? it's a cheap replacement part.

 

Nice! Glad you figured it out. Can you post links to the information you found?

If it were clogged then it shouldn't let enough pressure through to register as normal pressure.

 

I am having similar issues - I've never heard of a ballast resistor -What is it?

 

I will try and get some links up later. Tim it all depends on what year cherokee you have. and I am not sure what years that they put them in. the reason they did this to cut down on the voltage to the fuel pump to make it quiter. the ballast resistor , if you have one would be one the drivers side fender next to the vacuum booster for the brakes. it is a lite tan color and has a wire that attaches to both ends. if this goes bad it will not show up on your scanner or I should say it will say that there is no fuel on the snap on scanner. to check it us a volt meter on Ohms and it should have 1.1 Ohms across the two conntects.