Still seems like this dam dual sync distributor is losing spark, I can see the signals are still fine on the scope but the high voltage side just randomly seems like it has no output ive tried multiple timing lights and they all seem to intermittently work . I did some reading looks like the holley dual sync distributors have alot of issues. I was alble to call summit and they sent me a new one should be here tomorrow. If that dont work I do have a bic lighter