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Re: backfire sound
It looks like you have fuel still burning in the exhaust . Maybe a plug not firing every cycle or a litte rich . Is that cold condensation on the ground or was the engine completely warmed up ? At night , can you see flame ? cool if so . Exhaust valve openning too early ? rocker arm too tight ? Good luck , Rob
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2000 Trans Am six speed Blackbird .Fast enough stock!
2005 Grand Prix.
2005 2500HD Silverado 4x4 , Duramax!!!!!!! Lifted ,Pumped,Humped,Thumped!
1988 JEEP Cherokee: Lifted, Sons new toy.
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