I have a 1997 Saturn SL 1.9 with gas in the oil and 30 psi in #4 cylinder the other 3 cylinders are at 180
A "Bad cylinder" or "dead cylinder" is a cylinder with Low compression psi. Symptoms: rough running low power can cause high oil consumption
Could be gas in the oil causing low or no compression.
first you have to determine if it is oil or fuel if it's oil then do a compression test if it has low compression squirt oil down the cylinder and if it increases then you got leaking rings if that checks out ok then do a cylinder leakage test that way you can tell if it is exhaust intake valve problems
Most common symptoms are thick white smoke (steam) coming out of the exhaust pipe, engine always low on coolant and/or running hot, and water in the oil (will appear on the dip stick as either "chocolate-colored" oil or water beads mixed with the oil). Another way to detect is to do a compression check on the cylinder head. The compression will be low on the cylinder(s) where the crack is located.
possibly a blown oil ring, pull cy and check rings. ANSWER: Rather then pulling the cylinder, you can do a compression test on both cylinders and compare them to what the factory says they should be at. If you have low compression in one cylinder and oil coming out of the exhaust, most likely then you have a bad oil control ring on the piston.
This could be that your rings are bad or that it is saturating your cylinder walls and going by the rings can figure this out by getting compression test.
Loosing Coolant, coolant in the oil, a sweet smelling exhaust, low compression, overheating, and possibly a miss.
Bad compression rings can allow gasoline to get into the oil.
Broken ring and you get compression blow by.
If the difference between the high and low reading is within 10%, it is withing normal specification. If more than 10%, try squirting oil into the low cylinder and retest, if compression comes up , this indicates a bad ring, if not indicates problem is a bad valve.
Excess oil from bad/stuck oil rings in that cylinder could do that.
Oil burning or loss of compression on any one cylinder. It may also be missing on one cylinder. A compression test will verify this.