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#1
05-18-2006, 05:31 PM
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For those who think you know Jeeps, Try to figure this out...
My Jeep has been sitting for the last 6 months because it just died suddenly... I wasn't getting spark or fuel. Today I had time to mess with it for a few hours and was troubleshooting everything. The coil was getting power but no spark when cranking. We could get the fuel pump to have power if we straight ran a wire from the pump to the battery.
Now for the fun part... While checking for spark again, I had #1 spark plug wire unplugged and put a screwdriver in it and let it rest on the valve cover. While my friend tried to startthe car I could see sparks hitting the valve cover then all of a sudden 2 seconds later the Jeep was running. I put the wire back on the plug and the thing runs awesome! This has happened in the past and so I am not sure what could cause this to happen. For all you Jeep gurus out there try to figure this one out.. 
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#2
05-18-2006, 10:33 PM
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Re: For those who think you know Jeeps, Try to figure this out...
Check your CPS and the ground wire from the rear of the engine to the firewall.
__________________
89XJ Laredo, 2 door, 4.0L, Automatic. Rusty's 3" Full-Spring Pack Lift, Steering Stabilizer, Bumpstops, Steering Brace, and Adjusatable Track Bar. ProComp 31X10.5X15 AT's on 8" Steelies. Dynomax Super-Turbo Cat Back.
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#3
05-18-2006, 11:25 PM
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Re: For those who think you know Jeeps, Try to figure this out...
Welcome to the forum!
I would have to agree with the CPS (Crankshaft Position Sensor) suggestion. I had the same symptoms last year on my 92 Cherokee (dying and different times, sometimes restart, sometimes not). And making sure that you have good connections all around is always a good suggestion. Let us know what you find. Take Care,
__________________
Greg A. 2001 Chevy Venture w/some "enhancements" ~ 105K Miles (Dec. 2010) 1992 Jeep Cherokee Laredo, 4.0L, Automatic ~ 155K Miles (Dec 2010)
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#4
05-19-2006, 12:12 AM
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Re: For those who think you know Jeeps, Try to figure this out...
I have actually already replaced the cps so I don't see how it could be that. And I have already regrounded the engine a number of times. So I am stuck
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#5
05-19-2006, 06:28 PM
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Re: For those who think you know Jeeps, Try to figure this out...
Quote:
You also didn't mention if there were any codes stored in it. When mine failed, there was NO check engine light, but there was a code stored anyway. That is what directed me to the CPS. Take Care,
__________________
Greg A. 2001 Chevy Venture w/some "enhancements" ~ 105K Miles (Dec. 2010) 1992 Jeep Cherokee Laredo, 4.0L, Automatic ~ 155K Miles (Dec 2010)
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#6
05-19-2006, 07:47 PM
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Re: For those who think you know Jeeps, Try to figure this out...
Yea no check engine light, it is a 91. How do you pull the codes on obdI?
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#7
05-19-2006, 10:59 PM
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Re: For those who think you know Jeeps, Try to figure this out...
Quote:
OFF-ON-OFF-ON-OFF-ON (within about 5 seconds) Then watch the check engine light. It should flash 2-digit numbers at you For example: FLASH PAUSE FLASH-FLASH = 12 (long pause) FLASH-FLASH-FLASH-FLASH-FLASH PAUSE FLASH-FLASH-FLASH-FLASH-FLASH = 55 See what you get and post back here. Take Care,
__________________
Greg A. 2001 Chevy Venture w/some "enhancements" ~ 105K Miles (Dec. 2010) 1992 Jeep Cherokee Laredo, 4.0L, Automatic ~ 155K Miles (Dec 2010)
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#8
05-20-2006, 01:48 AM
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Re: For those who think you know Jeeps, Try to figure this out...
Yea I just got a 12 and 55 so all is good there.
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