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Unread 07-13-2008, 11:15 AM   #1
tagalong
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1990 XJ Cherokee 
 
Join Date: Jun 2008
Location: nwgeorgia
Posts: 8
1990 4.0 slow to crank

turns over fine and will crank just takes 5-10 sec hot or cold

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Unread 07-13-2008, 12:52 PM   #2
Fir3Chi3f
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1987 XJ Cherokee 
 
Join Date: Jun 2008
Location: Chicago
Posts: 375
Are you using one of those small batteries?

Buddies jeep cranked slow but, the battery in was like half the size of a regular battery
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Unread 07-13-2008, 12:57 PM   #3
Willy36
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1990 XJ Cherokee 
 
Join Date: Dec 2007
Location: FoCo, Colorado
Posts: 1,168
My XJ used to have the same symptoms and it turned out to be a fuel pump. They usually go slowly so it's not really important to replace it immediately, but don't wait until it craps out when your 20 miles from home like I did.
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Unread 07-15-2008, 02:13 PM   #4
tagalong
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1990 XJ Cherokee 
 
Join Date: Jun 2008
Location: nwgeorgia
Posts: 8
my be fuel pump it has a 975 coldcranking amp battery it turns fast just wont hit right off has to turn over 3 or 4 times
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