The volume of the cylinder would be doubled.
Volume doubles
It doubles The volume of a cylinder height times diameter squared times 3.14
The volume goes up by 9 times
The volume becomes one eighth.
start with new plugs
Cross-threaded spark plug.
Could be a bad coil (each cylinder has its own) common problem
i tmakes the car judder a i and the engine misfires
P1399 is a pending code for random or multiple cylinder misfires.
Your 1996 Pontiac Grand Prix will experience cylinder misfires when one or several of the spark plug wires are bad. A bad spark plug can also cause the problem.
Chek out the ignition coils, the wires and the spark plugs..
Plugs, wires, coil, distributor, injector, internal engine....
the injectors....
All symptoms of bad timing; stalling on sudden wide open throttle, running rich or lean, misfires, especially continuous misfires on the same cylinder, or just simply not running.
The engine , if it runs at all , will , of course , have misfires and may have a 'backfire' .
Kickback is a slang term for a bribe, or what happens when you spin an aircraft'spropellor to start it and it misfires.