I have a 88 cherokee trail rig that has sat for about a month after wheeling all summer it has ben geting harder to start but nowwhen i try to start it cranks fine but wont chatch has fuel and air but no spark. i have repaced the spark plugs and wires over the summer. Im thinking its a senser but im not shure were to start cps? im not in a panic to fix it its not my dd but im geting ready to swap in a 8.8 but need to figure this out before i can have fun with the welder.thanks for any help.
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no start no spark
- Thread starter randomxj
- Start date
- Location
- NC Sandhills
I'd advise swapping in a fresh CPS just on general principle... if it fixes it, great! If not you have a spare 
Be advised that an aftermarket CPS may not allow the factory 'shouldered' bolts to pass through the brackets (without a slight bit of honing the holes out) I ran into this yesterday trying to fix wifey's Jeep, and of course my drill & bits were 30 miles away at work. Quik fix and I'll get the rascal installed this afternoon.
Hope this helps!
Be advised that an aftermarket CPS may not allow the factory 'shouldered' bolts to pass through the brackets (without a slight bit of honing the holes out) I ran into this yesterday trying to fix wifey's Jeep, and of course my drill & bits were 30 miles away at work. Quik fix and I'll get the rascal installed this afternoon.
Hope this helps!
imma honky
NAXJA Forum User
- Location
- Augusta, Ga
Check your ignition control module. That's what went out on me. I replaced my CPS, TPS, and coil before I figureed it out.
is there a way to check the ignition control module or should i just change it out. Also is there a easy way to get to the cps. when i swaped moters on my 95 the only way i could get to it was with 2 universils and it was not fun is there a way i dont see. also the specs on the rig are 88 I6 5speed with a 231.Thanks for the help
Art Triggs
NAXJA Forum User
- Location
- Dutchess Co.,NY
You may want to check the camshaft position sensor, and the wiring to it, it is in the distributor, it is a hall effect sensor as well as the crank sensor, what you are describing could be caused by this sensor acting badly. (at least its easier to get at ...;-))
- Location
- NC Sandhills
Good advice on the ICM and Cam Pos Sensor
The 'best' way I've done the Crank sensor on an AW4 Jeep is using (3/8" drive) a shallow 11mm socket, then a swivel/universal thingy, then about 2' of extensions and the 3/8 ratchet. (turning the ratchet down below the front driveshaft.
IIRC (LOL just did this 45 min ago) I got the bottom bolt easier from inboard of the driveshaft, and the top bolt easier from outboard. Other than a little mud/leftover snow, it all went smoother than the one in my trail rig ...side of the road in the cold Dec rain, tools locked up inside & no hatch key, climbing over the seats to fetch tools, unclear what combo of gizzys would work, etc...
OTOH it seems like on my 89 5 speed, I could reach down on it from up top, using an 11mm stubby combo wrench.
The 'best' way I've done the Crank sensor on an AW4 Jeep is using (3/8" drive) a shallow 11mm socket, then a swivel/universal thingy, then about 2' of extensions and the 3/8 ratchet. (turning the ratchet down below the front driveshaft.
IIRC (LOL just did this 45 min ago) I got the bottom bolt easier from inboard of the driveshaft, and the top bolt easier from outboard.
Other than a little mud/leftover snow, it all went smoother than the one in my trail rig ...side of the road in the cold Dec rain, tools locked up inside & no hatch key, climbing over the seats to fetch tools, unclear what combo of gizzys would work, etc...OTOH it seems like on my 89 5 speed, I could reach down on it from up top, using an 11mm stubby combo wrench.
