You really only have to check one. But just make sure the metal of the plug touches metal on the engine and it will fire
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Super Moderator
Re: 2001 4.0
You really only have to check one. But just make sure the metal of the plug touches metal on the engine and it will fire
230 hp 4.3L Chevy
Built 4L60E with manual lockout
Atlas 4 speed
Griffin radiator
On board air
Warn 9.5ti on custom bumper
7.5" RE front and bastard pack rear on custom long arms
30 gal gas tank
lockers
And a bunch of other stuff
Level: Hummer (H2)
Re: 2001 4.0
Can't hurt never thought about trying that way
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