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Unread 04-18-2010, 12:20 PM   #1
bella mia
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1988 YJ Wrangler 
 
Join Date: Feb 2008
Location: florida
Posts: 270
Electric fuel pump.

When I turn my key on I can hear the fuel pump run for a couple of seconds and then turn off. What makes it turn off ?

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Unread 04-18-2010, 12:39 PM   #2
sentinal02
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1992 YJ Wrangler 
 
Join Date: Feb 2003
Location: New York
Posts: 6,688
Quote:
Originally Posted by bella mia View Post
When I turn my key on I can hear the fuel pump run for a couple of seconds and then turn off. What makes it turn off ?
the computer. it controls the FP relay and cycles it on when you first turn the key before starting to prime the system for starting
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RIP: '88 YJ 2.5L Ax-5 NP231
Posi-Loked. Herculined. Optima yellow top. 1" Shackle, 2" BDS. Cragar 397's Aussie front.

92 YJ 4.0L Ax-15 231
5" springs, 1" shackle 31's or 35's depending on my mood
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