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Unread 02-02-2013, 10:47 AM   #1
richh789
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1987 YJ Wrangler 
 
Join Date: Jan 2013
Location: myrtle beach, sc
Posts: 131
fuel pressure

With the key in the on position, when I press Schrader valve, fuel comes out, but stops.

My question is, should fuel pump keep pressure up, or does it need yo be running to maintain pressure?

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Unread 02-02-2013, 11:19 AM   #2
GotMoose
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1994 ZJ 
 
Join Date: Jul 2009
Location: , California
Posts: 54
The fuel pump is controlled by the computer. It runs: a few seconds when the key is turned on, at cranking and when the engine is running. The computer turns it off the the engine is not running.
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Unread 02-02-2013, 04:12 PM   #3
richh789
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1987 YJ Wrangler 
 
Join Date: Jan 2013
Location: myrtle beach, sc
Posts: 131
I wasn't sure. Having no start prob with spark. I figured to fuel.

After comp test I learned the pass side bank is completely flooding. About a teaspoon full in tester each cylinder
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Unread 12-01-2013, 05:42 AM   #4
richh789
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1987 YJ Wrangler 
 
Join Date: Jan 2013
Location: myrtle beach, sc
Posts: 131
Ended up being a bad socket for ecm relay
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Unread 12-01-2013, 07:55 AM   #5
coralman
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1998 ZJ 
 
Join Date: Jul 2010
Location: florida
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The fuel pump relay or the main plug to the pcm? Just asking.
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