340

It is not oil and I checked compression 150 on #1 160 on #3. I put the intake back on today looked at the plugs again 1 and 7 are lean 3 and 5 are rich 2 4 6 8 all look good. I have checked everything I can think of and talked to my engine builder he has been building engines for 50 years and is very good and he don't what to do next.