2007 6.0 silverado p0307 and p0527 code

[N8gunther]

Looking for advice, i have a 2007 chevy 6.0 and i was on my way home from work the other day and my check engine light came on so when i got home i parked it until the weekend when i had tome to look at it. I ran the diag and it popped up p0307 (#7 cylinder misfire) and p0527 (oil preasure sensor) i decided to conquer the misfire first so i replaced all plugs and wires and started it up again to see if that fixed the misfire and it did not, i replaced the coil on the number 7 cylinder cleared the code and started it up and same thing popped up. i ran a compression test and the 7 cylinder is at 80 psi. my question is, is it worth trying to go further with this motor and try to fix it or would i be better off just buying a new motor and doing a swap? If it's worth fixing then what would be my next step in diagnosing what is wrong?

[CamGTP]

It's worth fixing instead of a new engine if you ask me.

 

Pull the cylinder head is the next step. You'd be checking for a headgasket failure, valve problem or a piston problem. Next would be removing the piston itself to check the rings.

 

I'd be doing all that and then seeing what's up. Dingle ball hone the cylinder, new rings and a checked over cylinder head and slap it back together.

[richard wysong]

first do a cylinder leak test on no7 to determine where the compresssion leak is. it may be as simple as a broken valve spring

[richard wysong]

80 psi shouldn't cause a complete misfire so I'm betting there's a valve train problem

[richard wysong]

please let us know what you find when you tear in to it

[It's Tim]

20 hours ago, N8gunther said:

 i ran a compression test and the 7 cylinder is at 80 psi. my question is, is it worth trying to go further with this motor and try to fix it or would i be better off just buying a new motor and doing a swap? If it's worth fixing then what would be my next step in diagnosing what is wrong?

What about the other 7 cylinders?