4 cyl perkins only firing on two cylinders at idle?
4 cyl perkins only firing on two cylinders at idle?
I have a 318 perkins in my "farm stock" pulling tractor. It has been bored and stroked to be almost 390 ci, also has a ground cam in it from crower. No head work except the angles on the valve have been touched up.
When at idle cylinders 1 & 2 do not fire, but when it is at WOT it runs fine?
Any input is greatly appreciated.