Check the Piston Ring.
If the timing is retarded due to cam and crank timing, the answer is YES. If it is due to distributor or ignition timing NO. Compression is produced mechanically when all the valves are closed during the compression stroke of the piston. If all is well (rings and valves), you should achieve optimal compression from the engine. Almost all gasoline engines require a least 80 psi to fire the cylinder.
You may have compression on any cylinder where the valves happen to be closed, but you will not have compression on all cylinders. 1991 Sable does not have a 305 engine.
Usually no compression is a mechanical failure. Probably the timing belt, May also have bent valves.Usually no compression is a mechanical failure. Probably the timing belt, May also have bent valves.
You can do a cylinder leakage test to check for bent valves.You can do a cylinder leakage test to check for bent valves.
It is exactly what it says. The number of valves the engine has per cylinder. If you have 16 valves on an 8 cylinder engine, you have 2 valves per cylinder.
check the compression
Bad cylinder head gasket or valves.
The piston is on the up stroke to compress so both valves are closed
caused by rings, hole in piston, head gasket, or valves
Remove number one spark plug and squirt some motor oil into the cylinder. Now do another compression test. If the compression goes up considerably in number one cylinder you probably have bad/worn or cracked piston rings. If the compression doesn't change much you probably have burned or bent valves.
The camshaft ( it actuates the opening and closing of the cylinder head valves) has to be synchronized with the crankshaft (via the timing belt). Otherwise the pistons would hit and bend the valves. The spark plug firing has to be synchronized to the compression of the gas fuel mixture. The fuel injectors have to be synchronized to the opening of the intake valves.
Remove coil wire from distributor cap and ground the wire. Remove the spark plug from number one cylinder. Stick your finger in the spark plug hole. Have an assistant jog the engine over with the key. When you feel and hear compression coming out from the number one cylinder (it will be obvious) tell your assistant to stop. At this point you will continue to move the crankshaft clockwise by hand until the timing marks for TDC are lined up. You now have the TDC firing point for number one cylinder.