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Let's see, out of time, burned valve, stuck valve, valves adjusted too tight, stretched timing chain, flat cam, crossed plug wires. What is happening is this, the plug is firing the mixture in the cylinder, a valve is not sealing the explosion. Or, the spark plug is firing at the wrong time, thus igniting the "charge" in the exhaust, or intake manifold. In other words, the valve, and ignition timing, (spark) are out of sync.
What else can I help you with?
What would make a Chevy small block backfire on deceleration?
Unburned fuel in the pipes. Your running a little rich, or, maybe the float level is a little high in the carb.
Does a 1989 Chevy 350 5.7 liter have a big or small block?
That would be a small block.
Why would a 5.7 Chevy small block run lumpy?
A cylinder is misfiring.
Will a stock small block Chevy 400 crank fit in a 350 small block?
No. You would need to have the main journals turned down .200". Then it would fit.
What would i have to do to my gen 1 small block Chevy to run nitrous?
no modifications necessary
what is the Difference between 348 CID Chevy engine and 454 CID Chevy engine?
Many. 348 would be a small block, whereas the 454 is a big block.
What would i need to swap a 4.3l v6 out of a 1991 Chevy s10 4x4 to a Chevy 350 small block?
Everything
Is a 6.2 liter a big block or small for a chevy?
That would be a big block. If you are referring to the diesel engine, it is based on the Oldsmobile rocket block, and shares nothing with the engines usually referred to as big block or small block.
What is the stock block color for a 1986 Chevy silverado 350 big block?
The 350 is the small block, and in 1986 it would be GM corporate blue.
Changing from a 350 small block to a big block 454 in a 1978 Chevy 4x4 would you need to change the motor mounts?
no
Where would you add oil to a 350 Chevy small block engine?
One of the valve covers.
Will a rx7 transmission work with a small block Chevy engine?
It would never hold together.....
