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Jul 21, 2014 | 06:29 PM

#16

s346k

CF Veteran

Joined: Feb 2012

Posts: 2,282

Likes: 18

From: central IN

Year: 1997

Engine: 4.0

Quote:

Originally Posted by Desertfox1023

I sprayed break cleaner around the intake. Found that it has a leak around the center of the intake at the gasket. Spark plug wires all looked ok.

Would I need to increase the spark plug gap after the mods I made?

no, plug gap remains the same. I could be wrong on the arc, but that's what it sounds like to me. sounds like the snap and a misfire happen at the same time.

Jul 21, 2014 | 11:38 PM

#17

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,579

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Fix the vacuum leak and leave the plug gap stock.

Aug 10, 2014 | 03:53 PM

#18

Desertfox1023

Thread Starter

CF Veteran

Joined: Apr 2008

Posts: 2,340

Likes: 8

From: Burlington, NC

Year: 1994...mostly...

Model: Cherokee (XJ)

Engine: 4.0L I6 HO, Lot's of Bolt Ons

Well fixed the issues.

Exhuast leak was bad mainfold gasket.

Random miss was from a bad Coil & distributor cap.

Aug 12, 2014 | 06:56 AM

#19

Fred/N0AZZ

CF Veteran

Joined: Jul 2013

Posts: 7,554

Likes: 17

From: Monett, MO.

Year: 1999

Model: Cherokee

Engine: 4.0

APN doesn't have a very good mating surface from what it look like and welds..........I hate cheap headers might as well use stock, expect to replace gaskets often if I had my guess.