Help out a newbie..Very rough start and sitting/idling question - JeepForum.com

 
LinkBack Thread Tools
post #1 of 5 Old 09-12-2004, 02:03 PM Thread Starter
mr_user
Registered User
 
Join Date: Sep 2004
Location: Fairfield, CT and Oxford, OH
Posts: 2,067
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.

mr_user is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 09-12-2004, 02:24 PM Thread Starter
mr_user
Registered User
 
Join Date: Sep 2004
Location: Fairfield, CT and Oxford, OH
Posts: 2,067
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?
mr_user is offline  
post #3 of 5 Old 09-12-2004, 08:06 PM
akshunj
Registered User
 
Join Date: Sep 2004
Posts: 30
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?
akshunj is offline  
post #4 of 5 Old 09-12-2004, 08:28 PM Thread Starter
mr_user
Registered User
 
Join Date: Sep 2004
Location: Fairfield, CT and Oxford, OH
Posts: 2,067
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?
mr_user is offline  
post #5 of 5 Old 09-13-2004, 07:57 AM
greasefingers
Registered User
 
greasefingers's Avatar
1994 ZJ 
 
Join Date: Sep 2003
Location: Northern VA, USA
Posts: 8,237
No matter what the problem is; you must buy a new battery.

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
greasefingers is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
rough start question RJH02 ZJ Grand Cherokee Forum 12 05-02-2010 05:00 PM
Heep has been sitting: Rough Idle: Wet JoshuaDHarp ZJ Grand Cherokee Forum 8 01-25-2010 07:53 PM
Rough Starting/Idling impuresoul2k3 ZJ Grand Cherokee Forum 0 01-03-2010 07:21 PM
Rough Idling WJ! slick2570 ZJ Grand Cherokee Forum 2 01-14-2007 07:21 AM
Idling rough... slick2570 ZJ Grand Cherokee Forum 2 12-02-2006 08:16 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome