6.6turbo compression

[Bowtie4life]

Thank you very much. I had a mechanic friend of mine help me do this we did disable the fuel after we've been running it in his driveway we pulled all 8 glow plugs to do the test first couple tries blue the release valve on his compression gauge and then change to new needle and did the test again and that's when we came up with the seven 75 and 800 PSI I will try it again with a starter button and leaving the key off probably won't happen until this weekend and I will let you know on an update from their thank you much

[Bowtie4life]

By the way what should an average compression be for that motor it has 240000 something miles on it and is been driven like a grandmother owned it