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XJ Ask the Question Thread
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Year: 1999
Model: Cherokee
Engine: 4.0 high output
Why is my voltage dropping when air is on but when its off it overcharges.alt was tested good 770 cca and 15v. Also air and heat only comes thru defrost vent not main vents checked every switch
99 xj sport
99 xj sport
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Year: My Jeep is a GMC
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Year: 1999
Model: Cherokee
Engine: 4.0L
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Year: 1989
Model: Cherokee
Engine: 4.0 6I
same issue with ac
I got an 89 XJ with exactly the same problem . I was told the ac issue was lack of vacuum but I have Vacuum all the way back up to firewall I changed out the AC/heater control switch panel and still have same issue .
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Year: 1996
Model: Cherokee
Engine: 4.0
1996 fuel pressure regulator on pump
Is the only place to get a fuel pressure regulator for a 96 the junkyard? I did some searching and couldn't find anything. One place had a complete fuel pump assembly for $700!! Maybe swap it for a newer year setup?
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Use a meter and post up the voltage readings.
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Keep in mind you WILL most likely have vacuum at idle. It goes away when accelerating if there's an issue in the vacuum system.
As for the 99, some of your vents may be controlled electronically.
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Year: 1999
Model: Cherokee
Engine: 4.0 high output
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
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1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
CCA is the rating of a battery.
Buy a $5 meter and check this stuff yourself.
Buy a $5 meter and check this stuff yourself.
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Year: 1999
Model: Cherokee
Engine: 4.0 high output
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Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO