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i recently inheirited a very clean zj that has the 4.0 it has also been sitting for a year and a half, my uncle was driving it down 75 and it just shut off, he replaced almost every sensor there is and took it to a shady mechinc but had no luck with getting it going ( the garage should not be allowed to touch a car) my uncle died recently and my aunt decided to give me the jeep so what im trying to figure out is whats wrong with it it has spark has fuel and the timing is good so any input would be very appercated
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98 xj 4.5" lift -
My first thought is that is that if you've got good fuel, spark, and timing, it would run. Are you sure?
The "just shut off" sounds like a cps. But then you'd have no spark, and fuel pressure, but no injector pulse...DIRTY DEEDS, DONE DIRT CHEAP
Whatever doesn't kill you makes you stranger -
Correct me if I'm wrong but 96 should be obdI... I'm pretty sure u can buy a $20 book at advance and go thru the code reading procedure.. Use a paper clip and cross the 2 pins and however it flashes, match that with what the book says... Will give u a starting pointS10 with a few air shocks..
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the cps has been replaced, and i have no codes being thrown, with good fuel and spark i figured it would run but nothing it cranks and doesn't run and i cant think of what else it could be98 xj 4.5" liftComment
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just noticed that the sensor for the oil sensor unit has the wiring harness female part broke off would that not let it start???98 xj 4.5" liftComment
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open the air intake tube spray starting fluid into the intake crank it over... if it indeed has spark it will fire... now if that works you have a fuel delivery issue... if it don't fire you are not getting spark. start there.just don’t get stupid and stick a Chevy engine in your Jeep. Man I hate thatComment
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Basiclly what comanchedude said is the best way to start, just had similar issues with a
96 xj, ended up having low fuel preasure so I replaced pump, coil was going bad so i replaced it and
had to replace cps with a factory one....guess autoparts store cps are spotty at best...
You can check resistance on cps, and on coil....also fuel preasure...Comment
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Not sure but there is a chance that the ECM will shutdown the engine if it senses no oil pressure.Originally posted by dan View Post
When you say "good fuel" what do you mean? Fuel pressure good, injector pulse width signals?Comment
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A 96 is OBDIIRomans 7-8Comment
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When you say "good fuel" what do you mean? Fuel pressure good, injector pulse width signals?[/QUOTE]
it has good pressure and good injector pulse98 xj 4.5" liftComment
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My bet is cps91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.Comment
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the cps is new but from what i understand its a 50 50 shot getting one from autozone98 xj 4.5" liftComment
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Thats where I would start, mine was autozone cps and had to replace with jeep one..Comment
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A bad CPS = no spark.If you have spark,than the CPS is good.I would try the starting fluid recommendation from Tom(Comanchedude).Also, a compression check,along with a spark plug check...
Good Luck
NickJust a 200 dollar cherokee that wouldn't start ..
Ten years later same chrome grille ..Comment
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Any progress?DIRTY DEEDS, DONE DIRT CHEAP
Whatever doesn't kill you makes you strangerComment
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