Timing issues and intake backfiring
#21
Racer
I would put money on it that the problem is elsewhere... It has an Accel coil on it, could the coil be bad? I am not familiar with how to test it (or if you even can), but it looks relatively new as well.
Either way, yes, I think you are into more than a spark problem but you do have to cover the basics off first. Next basic beyond spark is fuel flow and pressure. Simple plugged filter will cause a big drop in pressure at high rpm (high flow) and have no effect at idle when only small amounts of fuel need to get through. You have a filter screen in the tank and a normal filter under the car. A pressure gauge on the rail will tell the story there, but they are not that cheap and are a seldom used tool. Trial and error is only other way for fuel flow (new filters etc)