MGmike

Are you making any progress?

I've had a look at the data file but as it's the first time I've played with this type of data, I'm not going to make any bold statements! However, there are a couple of basic questions I'd like covered.
Are the plugs in the pictures in order of the cyl's they came from with 1 to the right and 4 on the left?
Do you know why cyl's 3 & 4 are showing ? in the misfire column and is it related to the reduced compression tests?

I think I might start looking at a head gasket or valve fault on Cyl 3.

Michael