Anonymous-0
Well-known Member
A friend of mine overhauled his Mustang and at times it idles smoothly and at other times idles rough. It has a valve job, bearings, rings, points, condensor, cap, wires, plugs, rotor etc. Vacuum during cranking is 2 inches and 16 running which seems low. He did not replace the timing chain as he said the marks on the sprockets lined up and the chain wasn't excessively loose.
The intake pushrod just starts to open when the mark on the balancer is at TDC. This seems late to me. The Ford manual does not give a spec.
Why does it run smoothly sometimes and rough other times? We tried a known good carburetor and coil to no avail. What are the symptoms of a chain that has jumped one notch?
The intake pushrod just starts to open when the mark on the balancer is at TDC. This seems late to me. The Ford manual does not give a spec.
Why does it run smoothly sometimes and rough other times? We tried a known good carburetor and coil to no avail. What are the symptoms of a chain that has jumped one notch?