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Changed my tune on that old 'just add more additive' fix for a rough idle on a 6.7 Powerstroke after it made my injector balance rates go haywire.
My boss in Tulsa said to try a double dose of cleaner before pulling the injectors, but after 3 days the truck started missing so bad I had to replace two of them anyway, costing me a full Saturday and $400 in parts I could have avoided.
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wendy_henderson216h ago
Tried that same trick on my old Chevy and ended up with a misfire so bad the check engine light looked like a strobe light at a concert. Guess my truck's injectors were just waiting for a reason to quit on me. Now I just stick with the fuel filter changes and hope for the best.
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xena5822mo ago
My uncle in Wichita swears by that cleaner trick, says it saved him a $2,000 bill on his dually. I mean, @kevin331 has a point about it being a cheap first step. Sometimes you get lucky and it's just some junk in the fuel line. Pouring a bottle in is way easier than tearing into the engine on a guess. It doesn't always work, but when it does you feel like a genius for avoiding the shop.
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kevin3312mo ago
Sometimes those cleaners just loosen up gunk that was barely hanging on. It might have been on its way out already, and the cleaner just sped things up. A rough idle can mean a lot of things, not always a stuck injector. It's a cheap thing to try before dropping real money on parts and labor.
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My buddy's truck was idling like it had a bad cold. He tried a bottle of that cleaner stuff, and it ran worse for a day before it smoothed right out. Guess it just broke up a chunk of carbon that was about to let go anyway.
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