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The movement of the piston from BDC to TDC.
Most of the times when you have low compression on one cylinder it's an indication that the head gasket is blown. If more than one cylinder has low compression and is hard to start the you most deffinatly have a blown head gasket
High compression is usually caused by either excessive carbon build up, excessive fuel being injected or oil or coolant getting into the cylinder.
sounds like your engine needs a valve job worn piston rings would also cause low compression ,but not cause the backfireing
If it is causing the cylinder to misfire, yes.
A "Bad cylinder" or "dead cylinder" is a cylinder with Low compression psi. Symptoms: rough running low power can cause high oil consumption
A cracked or broken piston will cause a loss of compression, as will cracked or broken rings. The failure of a head gasket will also cause a loss of compression, as will broken, cracked or badly worn valves or valve seats. A crack in the cylinder itself (either the sleeve or the engine block), or a crack in the head itself will cause a loss of compression. A problem with the plug threads or the threads in the head (for engines that have plugs) can cause loss of compression, and injectors (for engines that have them) can leak around the threads, either because the injector threads or the threads in the head have been damaged.
Maybe a bad valve
Coil pack and the spark plug- check compression
Bad are burnt intake or exhaust valve. Pistion rings broken, Burned pistion. Blown head gasket. That is all that would cause no compression are a loss of compression.
My timing belt was almost broke and they sais that it was a good thing that I got it to the dealer when I did, or the entire thing would have been wrecked. I don't think even a new engine would help Daewoo's have interference engines, more them likely you bent some or all of the valves...
Yes, a scratched piston will cause problems with compression. It scratches the cylinder wall and causes wear on the rings.