I have had problems with a 289 for the last 2 yrs. so far changed fuel pump to electric and back to manual. Added electronic ignition. Changed the carb and fuel filter. Changed coils and leads. The problem is that sometimes it's a pig to start. Sounds like it wants to catch but won't. Other times it starts and runs (very well) and then just cuts out and won't restart.

It doesn't cough and splutter to a stop it's almost like the ignition has been turned off. It tries to catch but won't. It's almost like the spark is to weak?

If that makes sense? I don't really understand tricity!! I'm more of a bit of a bit it with a hammer man.

Any ideas?