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Unread 04-14-2010, 06:00 PM   #1
bradtabor
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1988 YJ Wrangler 
 
Join Date: Apr 2010
Location: boise idaho
Posts: 12
Need Help: 5.9 Limited Starting Issue

My Jeep was driving fine and just died on me. Then when ever it would warm up it would die again.. I noticed I had no fuel pressure with I checked it at the rail.

I originally figured Crank Sensor, until it wouldn't even start when it was cold. Then I figured Fuel Pump.

So I replaced the fuel pump. Still no fuel pressure and it doesn't even kick on.. However the Relay is still good in the fuse box and even tried a known working one..

Also there is power going to the hot leads of the relay connection in the fuse box when the relay is removed and has the full 12 volts plus just like it should.

I also cleared the computer as well..

Can a bad Crank Positioning Sensor cause a fuel pump not to turn on???
Any Ideas??

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Unread 04-14-2010, 07:13 PM   #2
bobs68bird
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1979 CJ7 
 
Join Date: Sep 2009
Location: Warner Robins
Posts: 39
A few years ago I fuel issue with a chevy had power ,good pump ,and relay mine turned out to be a oil pressure switch wire shorted. try looking in a wire diagram. Also if your pump is in the tank check the tank harness. I had a bad plug on my pump on my truck. Just some ideas. Good luck.
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Unread 04-14-2010, 09:48 PM   #3
Texas WJ
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2005 WK 
 
Join Date: Mar 2006
Location: San Antonio
Posts: 2,053
Try the ZJ/WJ section, you're currently in the WK ('05- ) forum.
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cps , crank positioning sensor , fuel pump , starting
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