[Walkman]

It was a morning like any other kiss the wife and baby, heated up the plugs and vroom she started up no problem. I jumped on the feeder road for the highway and about 300m later I experienced a sudden and extreme loss of power along with a very rough sounding motor. I pulled over with it still running (roughly) and noticed that there was smoke grey, however it was a cold morning so I dont know how much was steam. Had it towed to the house.

I was hoping for advice some diagnostic test that I could do to help determine what broke?

I checked the oil that night and there was plenty plus I remember while she was still running that the oil pressure was good. The loss of power, exhaust, etc makes me think a bad cyl but I just dont know.

I dont have a compression test kit, but again was hoping for some advice on what I can do to trouble shoot this one?

Thanks in advance

This is a NZ spec 1982 BJ42 with a 3B.