96 4.0L randomly dies while driving - North American Grand Cherokee Association

TRASHPANDA · 11-17-2019, 05:41 AM

I will be driving and it will either backfire and die or just die and wont start till I relieve some fuel pressure from fuel rail I put new cap and rotor plugs and wires and it ran good for a few days and back to running like crap again I'm at a loss on what to do replace or do

Briian-Emmons · 11-18-2019, 11:03 AM

could well be Crank position sensor failing or the ignition switch is breaking contact

Could also be worth checking the main power and earth points for corrosion

TRASHPANDA · 11-18-2019, 11:43 AM

I know I can pull my ignition out of the steering column so I'm gonna lean towards that lol

BigKahunaJeep · 11-19-2019, 06:25 PM

Replace the battery. Low volts caises very weird things to our Jeeps.

Briian-Emmons · 11-26-2019, 03:38 PM

just as an update try a new coil pack

My 96 4.0 limited started doing this over the weekend and the coil pack is dying. tried a spare I got of a scrapped car and it runs fine, so have ordered a new coil pack up

Oldbeginner#63 · 11-26-2019, 05:44 PM

The first thing that comes to mind when you say you have to relieve fuel pressure is the gas cap. Is it the correct one for your rig?

11-17-2019, 05:41 AM	#1
TRASHPANDA Junior Member Grand Rookie Join Date: Nov 2019 Location: salem Oregon Posts: 2	96 4.0L randomly dies while driving I will be driving and it will either backfire and die or just die and wont start till I relieve some fuel pressure from fuel rail I put new cap and rotor plugs and wires and it ran good for a few days and back to running like crap again I'm at a loss on what to do replace or do

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11-18-2019, 11:03 AM	#2
Briian-Emmons Moderator Grand Addict Join Date: Feb 2011 Location: Basingstoke, England Posts: 512	could well be Crank position sensor failing or the ignition switch is breaking contact Could also be worth checking the main power and earth points for corrosion

11-18-2019, 11:43 AM	#3
TRASHPANDA Junior Member Grand Rookie Join Date: Nov 2019 Location: salem Oregon Posts: 2	I know I can pull my ignition out of the steering column so I'm gonna lean towards that lol

11-19-2019, 06:25 PM	#4
BigKahunaJeep Junior Member Grand Rookie Join Date: May 2018 Posts: 6	Replace the battery. Low volts caises very weird things to our Jeeps.

11-26-2019, 03:38 PM	#5
Briian-Emmons Moderator Grand Addict Join Date: Feb 2011 Location: Basingstoke, England Posts: 512	just as an update try a new coil pack My 96 4.0 limited started doing this over the weekend and the coil pack is dying. tried a spare I got of a scrapped car and it runs fine, so have ordered a new coil pack up

11-26-2019, 05:44 PM	#6
Oldbeginner#63 Member Grand Rookie Join Date: Aug 2019 Location: Pasco,WA Posts: 48	The first thing that comes to mind when you say you have to relieve fuel pressure is the gas cap. Is it the correct one for your rig?

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