4.0L jeep HELP PLEASE

[S10ROADSTER]

I have done and checked and replaced about everything i can think of, computer , plugs fuel pump , timing chain , dist. , plug wires , checked compression ( 154-169 ) checked fuel pressure (32 PSI ) ,I even pulled the pan andchecked out the bottom end !!!!!. and this thing WILL NOT START for nothing , timing is dead on and it cranks just fine then acts like its out of time then right back to cranking fine, it tries like hell to start but nothing ............. what am i missing I NEED this thing running by sunday night
Thanks
Thadd
My s10 was never this much of a problem lol

[smallblock283]

spray fuel into the intake and see if it starts then you know its a fuel problem. Is it sparking? check the wires sound like the wires are flip around

[HardinValleyMagic]

I feel for you. Look on the back side of the head in the bell housing. There you will find a crank sensor. $50 bucks from napa. It will be good as new.. Trust me 93 Cherokee sport 4.0 ho and a 96 Grand with the 4.0.
It is a sob to get to and change but it is possible.. Best of luck to you. I got rid of the sport now I need to get rid of the wifes grand... LOL!

[sickmojave]

I feel for you. Look on the back side of the head in the bell housing. There you will find a crank sensor. $50 bucks from napa. It will be good as new.. Trust me 93 Cherokee sport 4.0 ho and a 96 Grand with the 4.0.
It is a sob to get to and change but it is possible.. Best of luck to you. I got rid of the sport now I need to get rid of the wifes grand... LOL!


:crazy: I had the 94 Sport 4.0 sport, That sensor on mine just fell out and was hanging by the wire. it will not run like that.. LOL :D

[402bigblocks10]

i used to work at jeep, check your crank crank sensor and also check your wiring harness at the firewall. check it where it splices on the passenger side of the engine, right behing where the trans dip stick it, sometimes oil will get into the harness and short it out..

[S10ROADSTER]

I finally got it to pull the codes....it is the distributor sync pick up and the Crank sensor, just like you said 402, i am getting the parts tomorrow !!!!!

[402bigblocks10]

cool man, i hope it all works for you. good luck

[S10ROADSTER]

ok i replaced all that stuff and now NOTHING again.... very faint spark at cap , commingout of the coil it is very very hot spark , replaced cap and rotor, plug wires ,again , and still a faint spark i give up lol I guess that it is time to drop my "extra" 350 in it lol

[HardinValleyMagic]

Sounds familiar yet again. (Sadly) I bought a new crank sensor for the back side of the head area and turns out it was bad. Thank You NAPA!!!! After getting totally pissed it ended up at a dealer and watched a guy take the new one out and put another one in. What do you know the piece of crap started right up first try.
Ours would spark good for just a few seconds and then deminish..

[S10ROADSTER]

thanks guy for all your input and fixes ......i fixed it permantly this morning !!!!!
I traded it off for a 1969 Triumph chopper :)that runs just got to finish putting it together
THANKS AGAIN
Thadd

[HardinValleyMagic]

Sweet deal! Anything to get away from those cherokees. LOL!!

[OH_YO]

I feel for you. Look on the back side of the head in the bell housing. There you will find a crank sensor. $50 bucks from napa. It will be good as new.. Trust me 93 Cherokee sport 4.0 ho and a 96 Grand with the 4.0.
It is a sob to get to and change but it is possible.. Best of luck to you. I got rid of the sport now I need to get rid of the wifes grand... LOL!


X2 Been down this road before with a 4.0. Change it and I think yo will be happy.

[XTEN]

thanks guy for all your input and fixes ......i fixed it permantly this morning !!!!!
I traded it off for a 1969 Triumph chopper :)that runs just got to finish putting it together
THANKS AGAIN
ThaddWay ta go,Thadd!That'll fix it,right?

[S10ROADSTER]

yea I couldnt wait to get away from that (explicit) jeep .........here are a few pics of the bike only ,about 400 bucks for parts and a new chain and i can ride it on the street , leagley lol !!!!! still got to do the exhaust , gonna try to do it this weekend ...
Thanks again
Thadd

[HardinValleyMagic]

Looks like so great potential.