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.
It varies from one engine to the next but, what you want to see is that all the cylinders compression readings are within 10% of each other.
standard compression is 178psi min is 142 psi. +/- 15 psi between cylinders. That's for the 2.2 engine.
100-125psi
My 1991 Ford Mustang 5.0 liter V8 ( LX ) had a compression ratio of ( 9.0 to 1 from the factory ) ( 8th " character of VIN was an " E " )
The lowest reading cylinder should not be less than 70% of the highest and no cylinder reading should be less than 689 kPa (100 psi). Perform compression test with engine at normal operating temperature, spark plugs removed and throttle wide open
What is the cylinder compression on a 1991 Ford Ranger with a 2.9?
HI, Compression should be 128 to 156 psi, with no more than 14 psi. difference between cylinders.
it should have a b21. 2.1L.
Check out www.fueleconomy.gov
YOU SHOULD NOT HAVE A CHAIN IT SHOULD BE A DRIVESHAFT FROM THE ENGINE TO THE DIFFERENTIAL
Blue smoke is from engine oil. If the compression test read good the valve seals may be at fault.