So as promised I'm back to give an update. I drove the truck around a little more today and was able to test it out better with more open road and a longer drive. I can still feel a very slight miss fire type vibration that comes on around the same time as before 2500-2600 rpm, but it is about 80 percent better for sure. So my question is does mechanical advance affect rotor phasing? Or is it only vacuum advance that affects it? And my next question, is there anything else I can do before modifying a distributor cap that lines up better with the rotor blade? I was told I could file down the edge of the rotor a little bit the side where it spins under the contacts to help give the spark a little smoother transistion to the cap terminals. Thinking about trying that. Im also considering calling firecore and explaining the issue and seeing if they are willing to fix it.
