Iridium Spark Plugs Question

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Jul 15, 2013 | 10:17 PM

Scotty16

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CF Veteran

Joined: Jun 2010

Posts: 2,093

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From: Placerville, CA

Year: 1989

Model: Cherokee

Engine: 4.0 Inline 6

Iridium Spark Plugs Question

So pulled the old plugs from the jeep and theyre Champion Iridium plugs. I use oem copper core plugs....are the iridium plugs too hot? never used them before, just curious.

Jul 15, 2013 | 10:39 PM

mr white

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Joined: Aug 2011

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Model: Cherokee

It's a gimmick unless you have ultra high compression in which case it *might* be beneficial.

Jul 15, 2013 | 10:41 PM

Tom95YJ

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Joined: Nov 2011

Posts: 3,603

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From: SLC, Utah

Year: 1999

Model: Cherokee

Engine: 4.0L

Just put in some new coppers that plug is better suited for a newer high compression engine with direct injection

Jul 15, 2013 | 10:48 PM

gasouthernxj

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Joined: Mar 2013

Posts: 226

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From: Statesboro

Year: 1992

Model: Cherokee

Engine: 4.0L I6

I just put in some e3s and my jeep seems much happier. Better gas mileage too

Jul 15, 2013 | 10:58 PM

Scotty16

Thread Starter

CF Veteran

Joined: Jun 2010

Posts: 2,093

Likes: 2

From: Placerville, CA

Year: 1989

Model: Cherokee

Engine: 4.0 Inline 6

Yeah, Ive never seen iridium plugs before (I live under a rock) been doing some reading and iridiums tend to overheat from what ive been reading...ive always used oem coppers.