My 86 accord with 191,000 miles has a very bad miss when I shift from 3rd to 4th gear. It is almost like the engine is trying to rotate the opposite direction. But it does not happen all the time. Changed the plug wires and the fuel filters. I had a Studebaker years ago that had the clutch and the brake pedals both on the left of the steering wheel so when I first had the car, I would accidently step on the brake while trying to press on the clutch pedal. The miss is similar to that. Car idles great and runs great at 60 or 70 mph.