How long since you replaced the O2 sensors?
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Re: Rough Idle ....
How long since you replaced the O2 sensors?
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 (H3)
Re: Rough Idle ....
I have not done it since I bought it back in March 2012. I am not sure it has ever been done. Could a faulty O2 sensor or 2 cause it to do this?
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