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Unread 10-12-2009, 12:02 PM   #1
Registered User
1997 TJ Wrangler 
Join Date: Sep 2009
Location: Sanford NC
Posts: 46
problems with ignition

I am having a problem with the ignition/engine. I go in my jeep when it is cold( which is a 97 4cyl auto 70,000 switched the motor out) and I turn the ignition and it doesnt fire for mabey two seconds, and then I turn it off and turn it back on and it fires up great, or I turn the key but not all the way and leave it for a few seconds and then turn it off and turn it back on and it fires right up. Do you think it is something to do with the fuel injection, not sure can I get a little help

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Unread 10-12-2009, 12:26 PM   #2
Farm Wheeler
2000 TJ Wrangler 
Join Date: Apr 2005
Location: Elkmont, AL
Posts: 10,050
There is an anti-drain back valve in the fuel regulator. This valve keeps the fuel from draining out of the fuel line when the engine isn't running. Since this valve isn't working properly each time you start the engine after it has been sitting for a while the fuel pump must refill the line and build pressure before the engine can start.

The valve is part of the pump which is the fuel tank. The tank must be dropped in order to replace the pump. Unless you have other issues you might want to just put up with letting it sit with the key on for a moment before trying to start the engine.
Keep in mind that free advice can frequently be worth less than you pay for it.
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Unread 10-12-2009, 12:30 PM   #3
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1998 XJ Cherokee 
Join Date: Nov 2008
Location: Glouco, NJ
Posts: 1,837
Check valve is bad as mdm said.

Confirm by running it for a while and then park it, check fuel pressure and then compared the next morning.
1998 Jeep Cherokee 4.0L AW4/NP231 211k+

"Approximately 80 percent of our air pollution stems from hydrocarbons released by vegetation, so let's not go overboard in setting and enforcing tough emission standards from man-made sources."
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