Older vehicles with distributor-based ignition systems need their timing checked on a regular basis, otherwise you can have a host of problems. Starting becomes difficult, idling will be rough, ...
Your Mustang's distributor performs one heck of a job. It has to deliver a timed spark to each spark plug at precisely the right moment in sync with piston travel and crankshaft, camshaft, and valve ...
The Advance CurveAll engines require an ignition curve based both on the requirements of engine rpm and cylinder filling (volumetric efficiency). This means that at 3,000 rpm with the throttle open ...