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Poured a bottle of injector cleaner in my tank and my old truck started idling like a lawnmower
Figured a $7 bottle of the cheap stuff would smooth out the rough idle on my 2003 Silverado, but two days later it was shaking at every red light. Turns out I dumped in way more than the label called for and fouled a plug, so I spent Saturday morning pulling all 8 and gapping new ones in the driveway. Anyone know if those concentrated cleaners actually work right if you just follow the ratio, or did I waste my money twice?
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