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07-21-2014, 06:29 PM

#16

s346k

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Join Date: Feb 2012

Location: central IN

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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.

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07-21-2014, 11:38 PM

#17

cruiser54

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Join Date: Aug 2011

Location: Prescott, Az

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Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Fix the vacuum leak and leave the plug gap stock.

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08-10-2014, 03:53 PM

#18

Desertfox1023

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Join Date: Apr 2008

Location: Burlington, NC

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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.

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08-12-2014, 06:56 AM

#19

Fred/N0AZZ

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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.