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12-19-2008, 04:20 PM
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#1
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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My aunts jeep demon
My aunt has a 98 cherokee with 4.0 I6. She claims it dies out on the highway and sometimes at idle but only when the engine is hot. I had the car for a whole day and was only able to get it to stall twice in the garage and thats it so i see no pattern. Ialso tested the fuel pressure on a long test drive and saw no issues.
I suspected the hall effect switch so i switched that out as well as replaced the over do plugs,wires,cap and rotor and the problem went away.
Oh and it threw two codes...
1. Primary ignition circuit
2. Crank sensor signal
I cleared the codes and did the tune up and neither codes came back after running the jeep for quite awhile.
I just gotta call today that its stalling again!
Any Ideas?!?!
Im in a real pinch hear thanks
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
Last edited by Predator86; 12-19-2008 at 04:23 PM.
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12-19-2008, 04:25 PM
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#2
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,693
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crank position sensor is my guess. my buddies sentra does the same
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Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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12-19-2008, 04:26 PM
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#3
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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wouldnt the code keep popping up?
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
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12-19-2008, 04:35 PM
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#4
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,366
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i don't know what the conditions are to set the code. maybe a wire is pinched, broken, or rubbing. could be the sensor itself. could lie within the computer. had a dodge neon that showed all the signs of a bad crank sensor but the computer took a smack when it got into an accident and broke the wire within the computer.
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12-19-2008, 04:42 PM
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#5
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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thats what im thinkin but i wanna avoid the PCM if possible...
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
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12-19-2008, 06:45 PM
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#6
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Join Date: Aug 2004
Location: North Jersey
Posts: 3,047
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The 4.0 Jeeps are NOTORIOUS for having bad Crank Position Sensors. That's the one located on the back of the block, above the bellhousing. My mom had the same problem with her '99 4.0 Grand Cherokee, and a bunch of guys over on Jeepforum have experienced the same thing. Good luck with it!
__________________
Seeya,
Steve R. in North Jersey
'16 Go-Mango Dodge Charger R/T. It's so good to be back in a V8-powered, RWD car!
Former Toy - '88 Monte SS - had lots of mods...
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12-19-2008, 06:46 PM
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#7
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NJFBOA Co-Founder
Join Date: Jul 2004
Location: All up in your kool aid!
Posts: 12,235
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Very often when crank sensors go bad they just skip count. The code will only show when it is actually f'ing up, not all the time while it is cruising along.
I would start there and see if it clears up the ignition circuit, the crank sensor can cause that, not the other way around.
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12-19-2008, 07:04 PM
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#8
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Banned Camp Director Emeritus
Join Date: Aug 2004
Location: Somerset County
Posts: 8,395
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if the crank sensor is messing up it will actually knock out the PCM, thus clearing any OBDII data like codes. get a crank sensor for it and it should be good to go.
__________________
Quote:
Originally Posted by baddest434
and 1 more smart ass answer by you and i'm going to reach into this monitor and grab you by the throat
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12-20-2008, 12:55 AM
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#9
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,366
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oh yeah now i remember doing one of these. it was reading like 800mph or something retarded. yeah these guys are right.
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12-20-2008, 05:29 PM
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#10
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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alright cool thanks guys i'll let you know how it goes.
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
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12-22-2008, 10:38 PM
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#11
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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FYI, the crank sensor went on my '96 Cherokee a few weeks ago and never set a code.
- Justin
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1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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12-24-2008, 05:20 PM
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#12
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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put the crank sensor in today....book labor time was 0.7 and it took me closer to an hour and a half due to my fat hands not being able to reach that far under the transmission
oh and when i first brought it in the garage i scanned it and it had another history code for primary ignition circuit
thanks for the info guys and fingers crossed..i'll post something if she calls me back lol
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
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12-24-2008, 05:21 PM
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#13
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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Quote:
Originally Posted by Tru2Chevy
FYI, the crank sensor went on my '96 Cherokee a few weeks ago and never set a code.
- Justin
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did it have the same stall issues that my story had or was it dead?
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
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12-24-2008, 07:07 PM
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#14
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Quote:
Originally Posted by Predator86
did it have the same stall issues that my story had or was it dead?
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Nah, mine just died on the road and wouldn't restart. More of a glorious failure than an intermittent one. ECM never picked up any problems though....
- Justin
__________________
1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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12-25-2008, 11:24 AM
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#15
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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well the effing thing is stalling again! MERRY CHRISTMAS!
ive exhausted every idea so i dunno 
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
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12-28-2008, 05:04 PM
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#16
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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__________________
1999 Camry - Beigemobile DD
2002 Suburban - Wife's DD
2004 Grand Cherokee - Not running / Project / Selling?
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12-28-2008, 07:23 PM
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#17
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Join Date: Jul 2007
Location: Middlesex, NJ
Posts: 462
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Quote:
Originally Posted by Tru2Chevy
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tried it....no dice
__________________
Harry (Proud member of NJFB) www.myspace.com/newjerseyfbodies
1986 FireBird LG4
-FlowMaster 3inch American Thunder -Edelbrock Elite Series Intake -WS6 Style Functional Ram Air Hood -B&M Shift Kit -American Racing Outlaw II Alloys -Fuzion HRI Tires
8/26/07 Just reached 160K and running great!
1/15/09 Just reached 180K and still running great!
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12-28-2008, 07:31 PM
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#18
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,366
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i'd start tracing wires. my buddy had something similar in his grand cherokee and i believe a wire rubbed through the insulation and would ground out on the body on ocassion.
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