Fuel issue
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Newbie
Joined: Apr 2014
Posts: 21
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Fuel issue
I have an 88 4.0 and it has an extended crank and misfires at idle when cold cold my fuel pump be going bad I have a feeling I'm losing fuel pressure because my gas gauge stop working sometimes
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Longer than usual starting time ? Older Renix era jeeps do take longer to start . As for cold start issue when was last tune up performed ?
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
The fuel sender and fuel pump share a common ground point behind the trim panel where the spare tire is mounted.
freegdr is absolutely correct regarding the crank times.
What parts did you replace doing the tune-up? What brand spark plugs?
Ever cleaned the throttle body and IAC?
Checked to see if the intake manifold bolts have loosened up?
It would be great if you dedicated about an hour or so to do tips # 1 through 5 in my signature link.
freegdr is absolutely correct regarding the crank times.
What parts did you replace doing the tune-up? What brand spark plugs?
Ever cleaned the throttle body and IAC?
Checked to see if the intake manifold bolts have loosened up?
It would be great if you dedicated about an hour or so to do tips # 1 through 5 in my signature link.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
CF Veteran
Joined: Mar 2009
Posts: 2,750
Likes: 3
From: Visalia, Kalifornia, ussa
Year: 1996
Model: Cherokee
Engine: 4.0
Sounds like you have a grounding problem.. The gas gauge has NOTHING to do with fuel pressure, it a float in the tank attached to a potentiometer. Bad ground would cause the pump to stall and the gauge to quit,
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Member
Joined: Jan 2012
Posts: 232
Likes: 0
From: Topeka, KS
Year: 1996
Model: Cherokee
Engine: 4.0
Sorry to hijack a little. Is this same for all Cherokees. I have a 96 I am having what I believe to be fuel pump issues and I just last week added trailer lights and used that same spot to ground the trailer lights as I thought that was just a ground for the lights not other stuff. Could that be causing me issues by adding the extra ground to that same spot.