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Unread 05-19-2013, 01:13 AM   #1
airborne75
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2000 WJ 
 
Join Date: Apr 2013
Location: , North Carolina
Posts: 8
Engine dies while driving

For the last couple of months, while driving, every once in a while the engine felt like it would skip. Today it just died. I put it in neutral and coasted off the side of the road. It would turn over but not fire. Looked under the hood; nothing obvious. Fuel pump hummed; good sign. After about 20 minutes I turned the key and it started right up. Drove about 2 miles and it cut off again. Let it cool about 10 minutes and drove the last 2 miles to the house. I'm thinking it may be the crank sensor and hoping it's not the computer. Anybody had this problem and a fix?

2000 Grand Cherokee 4.0 6cyl.


Last edited by airborne75; 05-19-2013 at 01:16 AM.. Reason: added vehicle info
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Unread 05-19-2013, 01:35 AM   #2
Caelum
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Should be code for the crank sensor, when mine went out the code came on atleast
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Unread 05-19-2013, 02:06 AM   #3
kvn4
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check the fuel pressure,pump could be on the way out
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Unread 05-19-2013, 02:56 AM   #4
99WJ539918
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Quote:
Originally Posted by kvn4 View Post
check the fuel pressure,pump could be on the way out

+1... When fuel pumps are going bad they shut off once they get hot. After they cool down a little bit they can fire back up.
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Unread 05-19-2013, 09:38 AM   #5
airborne75
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I'll check for codes, check the fuel pressure and let ya know. Hoping it's not a fuel pump. I hate working with fuel.
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Unread 05-19-2013, 02:53 PM   #6
99WJ539918
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Where in North Carolina are you? I know some Jeep techs in the Raleigh area who do side work.
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Unread 05-20-2013, 12:08 AM   #7
airborne75
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I'm in the Charlotte area.
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Unread 05-20-2013, 03:29 AM   #8
Caelum
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Im.in concord if ya Need a hand just say the word
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Unread 05-21-2013, 07:21 AM   #9
sprocket1200
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Check the codes. Mine was the crank position sensor.

Sine the cam position sensor was so easy, I replaced that first.
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Unread 05-21-2013, 08:01 AM   #10
79chiefs
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Could be CPS, they are VERY sensitive to heat, and can have intermittent troubles with stalling. Also could check ASD relay, although by what you stated it is most likely not the issue here.
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Unread 05-21-2013, 06:50 PM   #11
airborne75
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I checked for codes even though I had no engine light. None. Wouldn't I get a engine light if the CPS or MAP sensors were bad?Will check fuel pressure tomorrow to see if it might be my fuel pump on the way out. Also read somewhere that there might be a bad ground at the computer. That and vacuum lines will be checked.
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Unread 05-21-2013, 07:05 PM   #12
79chiefs
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Mine had code for cps, still look up how to test it, check ASD too. Mine intermittently would kill the engine and it would start right up, it happened whenever it felt like it.
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Unread 05-21-2013, 08:09 PM   #13
scross1220
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I put my money on the CPS. Had the same issue. You probably will not get any codes if its the CPS so change it.
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Unread 05-22-2013, 08:37 PM   #14
airborne75
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I checked the fuel pressure and it was at the top of the range. Cleaned and reconnected the computer connections, put a steel brush and lube to the grounding bolt and checked all the vacuum lines. Changed out the CPS. Test drive....so far so good. Only driven a few miles but will put a lot more on it tomorrow. Thanks for all the help and offers.
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