i was going to say that my h22a did the same damn thing. Tach bouncing all over the place car acting like it was missing all the time(sounded like the crazy frog most annoying thing) I Changed my ignitor and coil in my distrubitor wich helped out for about a week then it started doing it again. THen it would stall out and not crank back up. I orderd a whole distrbutor off of ebay for like 200 buck and i havent had a single problem out of it since. I would see if someone had a distributor that you could borrow for a couple of days to see if that was it.