2007 silverado classic PO304 misfire code
#1
CF Beginner
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Join Date: Feb 2021
Location: maryville tn
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Recently bought a 07 silverado 1500 classic 4x4 and just love this truck it has the 4.3 engine and now I am getting a misfire in cylinder 4 . also just had lifters replaced before all this began the mechanic cant seem to find the problem but loves to replace things and get my money . plugs , cables , distributor cap and rotor were replaced and coil pack . I get a check engine light on steady and after about 2 or 3 miles of a steady cruising speed it will start bogging down or slit hesitation and when I hit the gas it starts to sputter and then it eventually clears and speed starts going up fast please help
#2
CF Monarch
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Possibly an injector problem. Try one of the better injector cleaners and see if that helps before spending any more big money on replacing more parts.
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