Sudden stalling - crank, no start. BAD CPS? - JeepForum.com

 
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post #1 of 4 Old 05-07-2014, 09:15 PM Thread Starter
jalexander69
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1995 ZJ 
 
Join Date: Oct 2013
Posts: 27
Sudden stalling - crank, no start. BAD CPS?

So I almost feel guilty for posting this as Im sure it has been posted hundreds of times but here it goes anyways.

Sometime last week I parked the jeep outside a buddies house and stayed for a few hours. When I went to leave, the jeep would just crank and crank but no start. We tested for spark and there wasnt any. I decided to just stay the night and try in the morning since it was already late. The next morning it fired up but idled VERY rough. I drove it home (about 20kms) and parked it. Since then I have had a few instances where the engine completely cuts out with no warning or stalling or anything on the highway. And it also stalled once as I switched from Drive to Reverse. Seems to stall once it reaches operating temperature (but not always) and seems to only stall when its hot. Then will only restart once it has cooled down for 10-30min. It also bogs down when going slow or taking corners, switching from Drive to Reverse, etc. Im guessing it is the Crank position sensor but if anyone has any feedback that'd be greatly appreciated. Im a student and this is my DD and I live out of town so I need this thing to be reliable for me. Thanks in advance!!!


1995 4.0 Red ZJ. 180xxxKM. 31" duratracs. 2 inch RE budget boost. Just getting started!
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post #2 of 4 Old 05-08-2014, 04:54 PM
ZeeJay1997
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1997 ZJ 
 
Join Date: Dec 2008
Posts: 8,704
if you want to try for immediate gratification, the crank sensor is a good bet.

i would try running it without the o2 sensor connected. if it still does it, reconnect o2.

then get it running and disconnect the cam sensor. it will run but will not start with the cam sensor disconnected.

if you have the time, the link below might bring you some joy.
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post #3 of 4 Old 05-08-2014, 05:47 PM Thread Starter
jalexander69
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1995 ZJ 
 
Join Date: Oct 2013
Posts: 27
Thanks for the reply. I have already disconnected the o2 sensor, which I should have included. And it ran the same. If I disco the cam sensor while running and it seems to fix the idle and symptoms would that mean its time to replace it? Sorry if it's a silly question I just want to be sure

1995 4.0 Red ZJ. 180xxxKM. 31" duratracs. 2 inch RE budget boost. Just getting started!
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post #4 of 4 Old 05-08-2014, 09:30 PM
ZeeJay1997
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Posts: 8,704
Quote:
Originally Posted by jalexander69 View Post
TIf I disco the cam sensor while running and it seems to fix the idle and symptoms would that mean its time to replace it?
yeppers
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