4.0 engine missfire

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Mar 23, 2010 | 08:44 PM

#16

jeeper84

Junior Member

Joined: Dec 2007

Posts: 37

Likes: 10

I was told that there was a recall on them for this problem, I have a factory installed heatshield on top of my intake manifold supposedly to stop the fuel vaporization problem in injector #3 causing misfire

Mar 23, 2010 | 09:07 PM

#17

98 JeepJeep

CF Veteran

Joined: Oct 2008

Posts: 2,543

Likes: 5

From: Stafford,VA

Year: 1998

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by BajaCrawler

Check you valve adjustment in your head mine is screwy on cyl 5 it has a 90psi difference in compression with 0% leak down, or your distributor might be wearing out and the center rod might jiggle around inside and not fire correctly.

no valve adjustment on a Late model production 4.0 Iron head.

Mar 23, 2010 | 09:08 PM

#18

98 JeepJeep

CF Veteran

Joined: Oct 2008

Posts: 2,543

Likes: 5

From: Stafford,VA

Year: 1998

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by jeeper84

replace the injectors with a set of 4 holes.....and your problem will be solved.

Mar 24, 2010 | 08:50 PM

#19

pierre

Junior Member

Joined: Jul 2009

Posts: 74

Likes: 0

Year: 2001

Model: Cherokee

Engine: inline 6

Quote:

Originally Posted by 98 JeepJeep

replace the injectors with a set of 4 holes.....and your problem will be solved.

set of 4 holes??

Mar 25, 2010 | 12:29 AM

#20

quinnt

Newbie

Joined: Dec 2009

Posts: 15

Likes: 0

From: Palmer, Ma/Rindge, NH

Year: 2001

Model: Cherokee

Engine: 4.0

Mustang 5.0 injectors

Mar 25, 2010 | 02:20 PM

#21

fivendime

Senior Member

Joined: Dec 2008

Posts: 990

Likes: 4

From: Washington State

Year: 1996

Model: Cherokee

Engine: 4.0L HO

Or Neon injectors....but they are more expensive. I am going to try to cut down on the heat issues first. That will also give me a cooler intake charge for better performance as well so its a win win.