I see someone else is having problems with a new petronix dist in a thread below. I feel your pain. Been nothing but a headache since installing a new one about a month ago in my 69. Low miles 400 on mild rv rebuild. Thing is, I'm running the same distributor in my 68 and it doesn't miss a beat. Go figure. Having issues with pre detonation and an intermittent miss. Didn't have these issues prior to new dist. Tried pulling the stock module and running it through my MSD 6AL box. Replaced the coil, plugs, wires, cap & rotor, pcv valve. Messed with the adv curve by trying different size springs. Replaced several questionable vacuum hoses, searched for vacuum leaks. Even rebuilt the carb. Probably a few other things too, just slipping my mind right now. Test drove after ever change without any difference...Replacing the coil and module in the dist is pretty much all there is or am I missing something? Next move is to pull that sucker and replace with MSD again. Any and all comments or suggestions are really appreciated at this point. Maybe make adjustments with ball peen hammer?

Well If you didn't have the issues with the previous distributor I would suggest puting that one back on and see how she runs.

I can tell you it would probably run better than this Petronix even though it's in a serious state of decay. In an earlier post I was fussing and whining about the MSD distributors and how they seem to "S!*t the bed" too soon and were too expensive. I went through a couple in a dozen or so years and I'm only putting a few thousand miles a year on them. (I had read similar story's online) and I know that can also be true about anything, but I've experienced this one first hand. The dist that came out is a mess and no hope of ever seeing any of my engines again. I'm guessing my options are slim so I guess it's time to order another mech MSD. Got some good ideas from fgf members in my earlier post (which is always the case).Just thought I'd give it one more try.