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Unread 11-09-2009, 07:14 PM   #1
jeepman1919
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Join Date: Aug 2009
Location: Maine
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Takes a long time to crank before it starts

I have a 1995 4.0 auto that has had a complete tune up plugs cap rotor wires distributer filters. It takes about 20 seconds of cranking before it starts. It got to be fuel related . It losses fuel pressure in the lines after 10 minutes of not running. I replaced the pump no change.

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Unread 11-09-2009, 10:23 PM   #2
jbreck
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1997 ZJ 
 
Join Date: Jun 2009
Location: Rich Hill, Mo
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I'm pretty sure its an o ring in your fuel pressure regulator. You can just turn your key over a few times before you start or buy the whole assembly its not cheap. Or you could do the swampy bypass conversion. Hope this helps.
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Unread 11-09-2009, 10:32 PM   #3
Mopargearhead
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1997 ZJ 
 
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Location: Lawrenceville, Ga
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Did you replace the pump with a new one or a remanufactured one? I've seen some techs go through a few remans before they got a good one that actually worked. You could have a fuel injector sticking open, but that should also cause a misfire. Have you checked your fuel lines for an actual fuel leak? It's not common. but it could happen.
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Unread 11-09-2009, 10:37 PM   #4
WhiteOut
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1998 ZJ 
 
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Posts: 8,178
Check your battery connections and make sure they are not corroded. My buddy has battery terminals that are soooo bad I have to clean them once a month for him. It will start wicked for 2 weeks then go downhill until I clean them again.
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Unread 11-09-2009, 10:44 PM   #5
jeepman1919
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thanks guys Ill check the battery connections. the fuel pump was a new one. No fuel leaks I already checked that. whats a swamppy bypass?
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