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Unread 01-01-2014, 05:31 PM   #1
PeteTJeep
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2002 TJ Wrangler 
 
Join Date: Aug 2013
Location: Tampa, FL
Posts: 9
Low Speed Engine shut-off

Ok so I'm new to the Jeep community and my jeep has its share of issues. It's a 2002 with the 4.0 and auto tranny. I have the O2 sensor issue that a lot of jeep owners have but since my engine is working fine I'm not concerned with that at this point. The issue I'm having that i want to discuss today is what I believe to be an overheating issue.

What happens is that I go wheeling and am going low speed with high revs up hills after about an hour of hills when i get to the top the engine will shut off and i won't be able to start it again for about 20 minutes until the engine bay cools down.

I replaced the coil pack, still having the problem. My next thought is to put in an electric fan and louver the hood to let out the hot air.

Has anyone else had this problem? know what it might be? know how to solve the issue?

thanks

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Unread 01-01-2014, 06:26 PM   #2
tomsrancho
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1999 TJ Wrangler 
 
Join Date: Jun 2009
Location: Farmington, NM
Posts: 202
In the old days, it would probably be vapor lock, though the high rpm's should prevent that. What's your temp gauge read while you're doing this?
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Unread 01-01-2014, 06:31 PM   #3
PeteTJeep
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2002 TJ Wrangler 
 
Join Date: Aug 2013
Location: Tampa, FL
Posts: 9
Reading normal at 210
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Unread 01-01-2014, 07:05 PM   #4
chris142
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2002 TJ Wrangler 
 
Join Date: Jul 2010
Location: Apple Valley,Ca
Posts: 2,774
IMO you have a bad Crank Position senser. It's kinda on top of the bell housing, drivers side. Sometimes you can get under there and tap on it, if it starts after tapping tap it again and see if it dies.
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Unread 01-01-2014, 07:10 PM   #5
freeskier93
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1997 TJ Wrangler 
 
Join Date: Oct 2009
Location: Longmont, Colorado
Posts: 6,688
Hood louvers would help, sounds like heat soak is causing some issues. Don't get an electric fan, the mechanical fan is blowing plenty of air.
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