Gapping spark plugs

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Mar 5, 2015 | 08:27 AM

Bullstang360

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Joined: Oct 2012

Posts: 161

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From: Poulsbo, Wa

Year: 1991

Model: Cherokee

Engine: 4.0 HO

Gapping spark plugs

I just installed the screaming demon Coil, Cap, rotor, and wires. The coil says to change gap to .065. Seems like a lot. Has anyone tried these yet? Should I just gap them a little bit or just go to the full recommended gap?

Mar 6, 2015 | 10:29 PM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Try it.

Mar 6, 2015 | 10:43 PM

XJlimitedx99

CF Veteran

Joined: Jul 2012

Posts: 3,132

Likes: 356

From: Andover, VT

Year: 1999

Model: Cherokee (XJ)

Engine: 4.0 L

Give it a shot and tell us how it works out. I'm interested.

Mar 6, 2015 | 11:32 PM

Rogue4x4

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Joined: Feb 2011

Posts: 14,479

Likes: 805

From: Blunt, South Dakota

Year: 97

Model: Cherokee (XJ)

Engine: 4.6 stroker

Quote:

Originally Posted by Bullstang360

Never even heard of them. Does seem like a lot...

Quote:

Originally Posted by cruiser54

Try it.

Quote:

Originally Posted by XJlimitedx99

Give it a shot and tell us how it works out. I'm interested.

^^^^Both of these. You'll know right away if it works or not, LOL

Mar 7, 2015 | 09:50 AM

Fred/N0AZZ

CF Veteran

Joined: Jul 2013

Posts: 7,554

Likes: 17

From: Monett, MO.

Year: 1999

Model: Cherokee

Engine: 4.0

Yup he should know by now, from that much of a gap must be quite a setup, all of it! I always ran all MSD but never ran a gap like that even on the race motors with a 13.5-1 CR. with a few more HP than an XJ.

If I might ask how much was that setup and I'm sure it was an eBay deal correct?

Mar 7, 2015 | 05:53 PM

Bustedback

CF Veteran

Joined: Feb 2010

Posts: 12,367

Likes: 23

From: Oroville, CA

Year: 1995

Model: Grand Cherokee

Engine: 4.0 with all of the noise and clatter

You run the risk of burning up the distributor cap, rotor, and plug wires by running that much gap. Not real expensive to replace, but when and where will you be stranded?