Hi Guys, can't stay away.
48 2 ton, splash oil 235, you'll remember the build. Dual carbs and exhaust, 700r4 trans.
Just heard from owner. driving home on the pike, 65 mph. Everything fine all day. suddenly looses a lot of power, won't go over 30.
Starts and runs a little rough. Spark to all cyls. Compression check = 80-83 in all cylinders!
Sounds like cam jumped a tooth, but???
Input anybody? It's gear drive, no timing chain. Gears are both steel, no fiber gear like old Volvos to wear out.
I'm diagnosing remotely so I can't see or hear it and nobody has a vacuum gauge.
No bad or funny noises. Carbs sound ok, miss can be heard in exhaust
However #5 doesn't make a noticeable difference when the wire removed, changed plug, no difference.
Could be a secondary problem, vacuum leak, too lean?????

Last edited by Jim Sears; 10/02/2017 10:53 PM.