HELP very low COMPRESSION!
2001 ford ranger XLT 2.5L
Hey everyone, so I was driving home and the truck started misfiring like crazy, I barely make it home and it says misfire in cylinder 3. I take the intake manifold off and change all 8 spark plugs with motor craft single platinum fine wire plugs gapped appropriately. I changed the spark plug wires and my idle air control valve as it was going bad. I start it up and it runs exactly the same. I then proceeded to do a compression test on the passenger side spark plug holes. it read like this, cylinder 1 140psi, CYLINDER 2 50 PSI, Cylinder 3 50PSI, Cylinder 4 120 PSI. I assume it could be the following, stuck valves, Bad rings, Hole in pistons,crack in head, or maybe a bad head gasket? ( because cylinders 2 and 3 are beside each other with no compression?) Its upsetting and I really need the truck running for my lawn business so I might have to go to a shop. I was just wanting to know everyone's thoughts. the truck runs but like crap. Does not smoke and it is not low on antifreeze, I have not drove it since sunday (5-15)
thank you for any input and help
Last edited by 14warnbr; 05-16-2016 at 08:05 PM.