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

Visitor in Dudley, MA on November 28, 2019

Tags: chevrolet, silverado 1500 classic

1 answer & 1 comment

Popular Answer

pushrod on November 28, 2019

Well do you feel the engine actually misfiring? ... SES light blinking ? ... PO303 only stored code?

pushrod on November 28, 2019

I can’t help without requested details!

Good luck!

Oil Leak Diagnosis

$88 - $111 Learn More

pushrod on November 28, 2019

Well do you feel the engine actually misfiring? ... SES light blinking ? ... PO303 only stored code?

pushrod on November 28, 2019

I can’t help without requested details!

Good luck!

2007 4.3 silverado p0303 missfire

Similar Questions