c-rokker

Hey all,just bought a 93 gran cherokee that just keeps ****ting the bed on me.So heres the deal,i turn the key,starter goes,engines turns but doesnt start.Ive tested the plug wires,no spark,tested the coil,no spark, so what now?Im desperate to get this thing running before the canadian winter arrives or else ill be hoofin it everywhere,thanks all

4.3L XJ

I assume you have the 4.0L engine? If so, the classic thing is that the crank position sensor is bad. Without it the computer doesn't know when to make spark or when to inject fuel. So it doesn't.

taythegibs

filling out your info will help out a lot

c-rokker

My bad,its filled out a bit more now.I was afraid it might be the crank sensor,thats no small job.

ol"blue

This should help with the CPS.*Click>-> Jeep Cherokee 2000 4.0L - Replace Crankshaft Position Sensor - Jeep Cherokee Forum
That's for a Cherokee, but the procedure is similar for the Grand.
And Welcome to CF.

taythegibs

you got the manual tranny lets see some pics!

c-rokker

Any other suggestions.Im just trying to try the least difficult fixes first.

ol"blue

It sounds like the CPS to me as well. Wish I could think of something simpler. Sorry.

c-rokker

Fair enough,ill start reviewing the procedure on how to remove the sensor,if anyone thinks of anything else post it plz,thanks again.Id post pics but honestly my jeep looks like crap,lots of body work,nothing special cept to me haha

seed

If you want easy,you could check the ASD relay first,it powers the coil. Just swap it out for another under hood relay or use a jumper on the pins. Could also be the PCM. Are you getting fuel?

c-rokker

Wow i just read the post about replacing the sensor,super awesome.My buddy told me id have to remove the rad,take off all the pulleys and take off the fron part ofthe engine,pretty big job but this cleared everything up ,thanks alot Ol'Blue.I just hope this is the problem

c-rokker

Whats the ASD and PCM?Im new to jeeps so take it easy on the acronyms hehe.Ye im getting fuel,pretty sure its not the pump and def not the fuel filter.I turn the key and everything turns but no start.Until three days ago it would start on the 3rd or fourth try.

seed

If you here the fuel pump kick on then it's not the ASD(automatic shutdown relay) as that kills power to the pump.As stated,i would test the CPS as that is most likely the culprit,are you able to pull any codes?

c-rokker

Tomorow i got a buddy coming with a portable scope so hell read the codes instead of me changing parts piecemeal as ive already changed the starter first thinking that was it.I do hear the pump so im sure thats not it.Its something before the coil cause the coil gets no power.

mobilecherokee4

you forgot one simple thing....a fuse...check the fuses that have to do with starting the engine and mayne it will wirk, thats what happened to me one time