Yes, a malfunctioning Automatic Compression Release (ACR) could potentially cause a Tecumseh OHV17 engine to have low or no cylinder compression. The ACR is designed to relieve compression during starting to make it easier to crank the engine, but if it fails to close properly, it can prevent the necessary compression from building up in the cylinder. Additionally, other factors such as worn piston rings, a blown head gasket, or a damaged valve could also contribute to low compression.
The lack of compression in one cylinder of a Chevy 355 engine could be caused by a number of issues such as a leaking valve, a blown head gasket, a cracked piston, or improper sealing of the piston rings. It is recommended to perform a compression test and further diagnostic tests to identify the exact cause of the low compression in that cylinder.
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
Thare are a number of things that could cause compression loss, Like bad valve, rings, or the head gasket.
Spark plug, wire, coil, low compression, fuel injector, intake leak, etc.
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.
No compression in one cylinder can be caused by several issues, including a blown head gasket, a damaged piston or piston rings, or a problem with the valve mechanism such as burnt or stuck valves. These issues can lead to a loss of sealing within the cylinder, preventing it from building pressure during the compression stroke. It's important to diagnose the problem through a compression test and potentially a leak-down test to determine the exact cause.
Check the spark plug, looking at the tip. The color and build up will help show if you are getting proper spark. Engine compression could be down as well, check the compression.