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Old 06-12-2021, 10:53 PM   #10
truckin 79
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Join Date: Jun 2014
Location: CO
Posts: 730
Re: Iridium spark plugs anyone use

Well I put in the new plugs and took my first 2 hour trip on the highway to a swap meet. The truck ran great funny thing is with new plugs truck seemed to run a little richer. With old plugs air/fuel stayed about 13.5-14 and iridium plugs are running 13. At idle the new plugs are even hitting 12 so interested to see what happens when these get a little age on them. I thought new plugs helped with better starts but after walking around swap meet and trying to start truck I had some starting issue. So far new plugs act like old plugs .
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79 Chevy 2wd BIG10 350 TH400
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