Yup that cylinder sounds low to me. It's way lower than the rest of them.

 

I have not noticed any signs of bad rings! No smoking nor oil loss! No sings of a head gasket, oil in coolant or vice versa or over heating. I have run a bottle of restore thru the crankcase just for precaution a week ago. I am leaning towards a stuck valve or something in the head for that cylinder. Gonna try a few more things that could point to exactly what it might be! leak down test, wet test ect... Thanks for the info and help guys! Any more ideas keep'em comin!

 

Squirt some oil down #5 and re check the compression. Ifpressure increases substantially it's probably a ring problem. Most likely it's a valve issue. If you have a vacuum gauge (or can borrow one) hook it up to the manifold. If the needle is bouncing around erratically at idle you have a valve seal issue. A sticky valve will most often cause some top end clacking.

 

I double checked yesterday andits still full of oil, so its not burning any. The coolantis the color it should be so mixing of oil there.And the oil smells just likeoil no gas or anything.The rough idle has seemed to calm down a bit and the CEL has disappeared on its own! So I am not sure what the hell is going on but Iam still gonna get a leakdown test done as soon as I can get a day off work that a local shop is open.