2007 4.3 silverado p0303 missfire

2007 4.3 silverado p0303 missfire

(2007 Chevrolet Silverado 1500 Classic)
i have replaced the wires,plugs.vacuum purcge,map sensor,coil pak and still when i hit 65 mph the service engine light comes on again ,with 0303 code, getting pissed , any ideas
Tags: chevrolet, silverado 1500 classic
1 answer & 1 comment
Popular Answer
on November 28, 2019

Well do you feel the engine actually misfiring? ... SES light blinking ? ... PO303 only stored code?
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on November 28, 2019

I can’t help without requested details!

Good luck!
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on November 28, 2019

Well do you feel the engine actually misfiring? ... SES light blinking ? ... PO303 only stored code?
Sign in to reply
on November 28, 2019

I can’t help without requested details!

Good luck!

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