hi Scotty im a big fan of yours, i got a 2007 chevy tahoe, and is having rough idle, check engine is on, alot of smoke out of the back pipe, what do you think is the problem? thanks

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charlz503
charlz503

ooh i see, should i put one of those clean injectors in the gas? is there one that u recommend?

carmechanic22
carmechanic22

Fuel injectors definitely could cause rough idle try cleaning them

carmechanic22
carmechanic22

Check engine light on means a misfiring cylinder most likely or oxygen sensor because than it means it ain’t breathing try bring it to a autozone and see what the engine light it if it’s he cylinder have them wipe it off since ya changed the spark plugs but sounds like you have the head gasket going and some exhaust leaks

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