96 zj

dan · 06-24-2013, 12:17 AM

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

WrenchMonkey · 06-24-2013, 01:21 AM

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...

humpy · 06-25-2013, 06:58 PM

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 point

dan · 06-25-2013, 07:32 PM

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 be

dan · 06-25-2013, 09:40 PM

just noticed that the sensor for the oil sensor unit has the wiring harness female part broke off would that not let it start???

comanchedude · 06-25-2013, 11:34 PM

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.

blazerbrad · 06-26-2013, 09:03 AM

Quote:

Originally Posted by dan

just noticed that the sensor for the oil sensor unit has the wiring harness female part broke off would that not let it start???

Not sure but there is a chance that the ECM will shutdown the engine if it senses no oil pressure.

When you say "good fuel" what do you mean? Fuel pressure good, injector pulse width signals?

itbrokeagain · 06-27-2013, 01:32 AM

My bet is cps

dan · 06-28-2013, 02:58 PM

the cps is new but from what i understand its a 50 50 shot getting one from autozone

race4fn · 06-29-2013, 04:52 PM

Thats where I would start, mine was autozone cps and had to replace with jeep one..

Coppertop · 06-29-2013, 07:20 PM

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
Nick

WrenchMonkey · 07-09-2013, 07:01 PM

Any progress?

06-24-2013, 12:17 AM	#1
dan gotta love middletucky Join Date: Jan 2007 Location: Middletown Posts: 106	96 zj 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 __________________ 98 xj 4.5" lift

06-24-2013, 01:21 AM	#2
WrenchMonkey Mechanical Animal - CORE Member - - Moderator - Join Date: Feb 2008 Location: Beechmont Posts: 1,883	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

06-25-2013, 06:58 PM	#3
humpy Join Date: Sep 2008 Posts: 573	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 point __________________ S10 with a few air shocks..

06-25-2013, 07:32 PM	#4
dan gotta love middletucky Join Date: Jan 2007 Location: Middletown Posts: 106	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 be __________________ 98 xj 4.5" lift

06-25-2013, 09:40 PM	#5
dan gotta love middletucky Join Date: Jan 2007 Location: Middletown Posts: 106	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" lift

06-25-2013, 11:34 PM	#6
comanchedude COMANCHE NUT Join Date: Jan 2007 Location: Ross Twp Posts: 166	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 that

06-27-2013, 01:32 AM	#8
itbrokeagain Just Empty Every Pocket - CORE Member - Join Date: Feb 2007 Location: Amelia Posts: 1,435	My bet is cps __________________ 91 fj 80 on 37 Nitto Muds with a 10k winch. Cage and sliders coming soon.

06-28-2013, 02:58 PM	#9
dan gotta love middletucky Join Date: Jan 2007 Location: Middletown Posts: 106	the cps is new but from what i understand its a 50 50 shot getting one from autozone __________________ 98 xj 4.5" lift

06-29-2013, 04:52 PM	#10
race4fn what?where?whateva..... Join Date: Jan 2007 Location: Middletown, ohio Posts: 27	Thats where I would start, mine was autozone cps and had to replace with jeep one..

06-29-2013, 07:20 PM	#11
Coppertop XJWHEELING Join Date: Nov 2007 Location: Colerain Township Posts: 837	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 Nick __________________ Just a 200 dollar cherokee that wouldn't start .. Ten years later same chrome grille ..

07-09-2013, 07:01 PM	#12
WrenchMonkey Mechanical Animal - CORE Member - - Moderator - Join Date: Feb 2008 Location: Beechmont Posts: 1,883	Any progress? __________________ DIRTY DEEDS, DONE DIRT CHEAP Whatever doesn't kill you makes you stranger

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