I bought a 89 yj with the 4 cylinder. The person I bought it from stated they put a new clutch in it and could not get it to start. There is no spark. It has a new coil, cap and rotor.Could he have done something wrong to the crank position sensor while installing the clutch? I checked the CPS and the ohms are correct
89 YJ no spark
- Thread starter kenn912
- Start date
what does your code say. do you have a cel showing? make sure all of the wire are pluged in tightly. i would check to see if CPS is properly installed.
jpjeep26uk
YJ Enthusiast
I have the same engine here in the UK.
Have you checked to see if there is a spark from the coil to the dizzy cap and then from each of the four leads to the four plugs?
Is the battery fully charged to 13 volts?
Got gas? Is there gas entering the injector?
Have you checked every fuse and relay to rule out any electrical breaks preventing some of the sensors form working?
Is the throttle position sensor moving freely and not been damaged??
Did the Jeep turnover BEFORE then PO putting a new clutch?
Just some areas to consider.
Do you get anything at all or just dead??
no cel, no codes. there are just 2 bolts holding the cps in place. I just wondered if the person putting the clutch in goofed something up. the cps bolts in at the back of the engine near the flywheel so didnt know where it gets its signal from.
No spark at all, battery full charge, it has gas no gas in injector but gas is circulating to the injector, will not start because of no spark to plugs, checked every fuse and relay, the person stated that it ran before he put the new clucth in. it cranks over good and has good compression just no spark.
check 12v wire going to coil with key on. if its hot take your coil off and give it a good shake. if it rattles you need a new coil
the only light that come one when turn the key on is "emiss check" is there a different check engine light
it has always been my understanding if no CEL, the PCM is out. you need to sent CHRIS, the forum director a personal message and get his expert crew on this problem. it something real simple, you just haven hit on it yet. keep us informed.
is there a different check engine light than the "emiss maint" light if there is and it doesnt come on should i just replace the pcm because it has a new cps, coil, cap and wires
I looked on ebay and the pcms for the 4 cylinder 89 used are over $400 or i can send mine to be repaired for $150 or a new one at autozone is $150 so why are the used ones so much
jpjeep26uk
YJ Enthusiast
Yep, sounds like coil or the module it sits in . You can buy a cheap tool that plugs into the end of the coil cables and lights up when voltage passes through it. Saved my life after I had the same issue. Turned out the module that the coil sits in was not getting the voltage it needed to generate a larger voltage to send voltage to the dizzy cap an on to the plugs. New coil and new module and boom she fired up.