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Unread 01-04-2006, 12:21 PM   #1
Pizzaboy04
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jeep stalls after driving long distances .. help

trI have a 97 jeep wrangler ..4cyl 5-spd .. truck runs great till about and hour or so .. if i rev over 3000 rpm the truck loses power .. seems like runnin out of gas .. i have to pull over let the car sit then start it up again .. what is it ?? the gas tank caroding ? fuel pump ??

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Unread 01-04-2006, 12:30 PM   #2
jeeptj19992001
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vapor lock
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Unread 01-04-2006, 12:31 PM   #3
Grimmjpr
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Sounds like your fuel pump is tired. I had a friend with an XJ she could drive for 2.5-3 hrs run great then die.....wouldn't start again unless it sat for a while. let is sit over night it would run another 2.5-3 hours......the shop she took it too replaced everything but the pump.....she kept getting stuck....finnally i told her to have them replace the pump......no problems at all once the pump was replaced. Hope this helps....
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Unread 01-04-2006, 12:36 PM   #4
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Quote:
Originally Posted by jeeptj19992001
vapor lock
vapor lock ??
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Unread 01-04-2006, 12:38 PM   #5
Jerry Bransford
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Does the engine suddenly just die? If so, that's a common symptom of the crankshaft position sensor going bad. Residing on the bell housing, the CPS picks up pulses from the flywheel and provides the master timing signal for the engine.
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Unread 01-04-2006, 12:44 PM   #6
RubiconSS
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Quote:
Originally Posted by Pizzaboy04
vapor lock ??
Kinda like when you are chugging coke out of a bottle and you get to the point where no more soda will come out. Usually a can of dry-gas or driving with the gas cap off will help. But, it's probably more along the lines of what Jerry was saying. Although, this can be a time of year for vapor locks. Does it happen when the tank is full or only when it's somewhat empty?
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Unread 01-04-2006, 12:56 PM   #7
Pizzaboy04
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Quote:
Originally Posted by RubiconSS
Kinda like when you are chugging coke out of a bottle and you get to the point where no more soda will come out. Usually a can of dry-gas or driving with the gas cap off will help. But, it's probably more along the lines of what Jerry was saying. Although, this can be a time of year for vapor locks. Does it happen when the tank is full or only when it's somewhat empty?

that is exactly what happens .. and alwayz after driving awhile .. then acouple times when i hit bumps it would happen .. ussually when half or less
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Unread 01-15-2006, 11:07 AM   #8
Bob71
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Check and see if the fuel lines are near the engine or exhaust. If so, you can buy line insulation (looks like aluminum foil) and wrap it around the fuel lines.

Vapor lock accurs when the gas boils and causes the gas to turn into vapor. This will accur faster the warmer the outside temp. is. If it's cold outside, it may never happend.
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Unread 01-22-2006, 08:18 AM   #9
CaymanYJ
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I had the same issues except that it would happen after about 45 minutes of driving. If you left it for a while it would be fine again. Replaced the coil and it was all fixed. Once the coil heated up it would fail.
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Unread 01-22-2006, 08:35 AM   #10
Scott_98TJ
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You can rule out vapor lock.
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