Help out a newbie..Very rough start and sitting/idling question - JeepForum.com
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Unread 09-12-2004, 02:03 PM   #1
mr_user
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Join Date: Sep 2004
Location: Fairfield, CT and Oxford, OH
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Help out a newbie..Very rough start and sitting/idling question

I recently bought a '96 Grand Cherokee with only 45K miles on it..It sat a lot with the previous owner. Until November when I can get my license and have it registered it is pretty much just going to hang out in the garage. Anyways, every day i try to let it idle for 10-15 minutes. When I go to start it in the morning, the thing will crank for a good 6-8 seconds before it fires up. Once it's started it runs very nicely; smooth idle, smooth revs everything...Is this start hesitation normal or is it from prolonged periods of idling/sitting in the Jeep's life. Do I need to replace the fuel pump or anything like that? Thanks in advance for everyone's help.

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Unread 09-12-2004, 02:24 PM   #2
mr_user
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Sorry, it is the 4.0L...It does have a battery problem and I've had to jump it twice in the past 3 weeks..Someone said that a faulty battery can alter the fuel pump sensor resulting in less fuel pressure..Is this a legitimate explanation?
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Unread 09-12-2004, 08:06 PM   #3
akshunj
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Whoever told you about a "fuel pump sensor", I wouldn't take much more advice from them. Most of the fuel system operates independantly of the car's computer.

For hard to start issues check the obvious things like the contacts on the starter and the battery terminals. Are they all nice and clean? Give them a liberal coating of dielectric grease in the future to prevent corrosion.

The dead battery is suspicious too. How old is it? It might just be worth your while to replace it so it doesn't strand you in the future.

Quote:
Originally Posted by mattfelner
Sorry, it is the 4.0L...It does have a battery problem and I've had to jump it twice in the past 3 weeks..Someone said that a faulty battery can alter the fuel pump sensor resulting in less fuel pressure..Is this a legitimate explanation?
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Unread 09-12-2004, 08:28 PM   #4
mr_user
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Yea, the battery is original so it's about 8 years old. The starter cranks strongly so i don't think it's the battery...anything else to watch for? It's most likely not the fuel pump?
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Unread 09-13-2004, 07:57 AM   #5
greasefingers
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No matter what the problem is; you must buy a new battery.
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Cheers Steve

94 Black Laredo 4-Liter with QuadraTrac (42RE trans & NP249 TC) 200,000 + miles purchased new

88 Cherokee 2-door with 5speed manual 139K miles(deceased) purchased new
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