AFFsoc2586

hey guys i have a 1994 cherokee 4.0L manual and on somedays i have trouble with it. It used to only happen once in a while, and now it seems to be happening more frequently. When i go to start it, it will crank but never get the motor working. i stop then try, the same thing, cranks but will not start. then if i leave it alone for hours and come back later it will start(most of the time), sometimes i just leave it alone overnight, and the next morning it will start up. i also noticed that when this happens and after trying for a while and i get it to finally start, and i drive off the car runs like *$#@. it feels like it is misfiring or something, just runs like complete poop. when i give it gas it feels delayed and i have to switch to a lower gear and try to give it more gas... Any iDEAS!!!!!!!!!!!!

thanks this is my car for school so any help is appreciated

VTJeep

put it on a code reader. but my guess is something along the lines of the CPS

freegdr

codes can be chercked with out scanner key on key off methodhttp://jeep-xj.info/HowtoECUcodes.htm

grsmnky1

What is your fuel pressure? Does it stay pressurized or de-pressurize as soon as you turn your jeep off? What is your compression in each cylinder? What is your battery voltage? Have you changed plugs and cap/rotor lately?
Put a spark tester/timing gun on each spark plug wire do they have current running through them as you try to crank it ( does it light the gun consistantly while cranking? If so get a spark gap tester and make sure it jumps the correct gap for our jeeps. Answer these questions and I can help you.

VTJeep

yea that works but most auto parts stores and garages will check it for free. i guess its preference...

freegdr

dont have to go any where to check them if having issues that could cause breackdown

AFFsoc2586

i did the key method of finding of the codes and all i got was code 55, so no codes detected

i had spoke iwth my father and he suggested getting a new cap and rotor for the districutor and possibly getting a new crankshaft position sensor

WHAT ARE YOUR GUYS THOUGHTS

freegdr

cranksensor issues would throw a code you would think ,i would start with fuel pressure check auto zone might rent a tester you get your money back with rental tools from them