stock 89 350 TPI. New plugs, new wires, injectors are all at around 16-16.4 ohms, new cap rotor, coil, igition module, pick-up coil. WHAT ELSE WOULD CAUSE A MISS? I am so clueless. Motor has unkown mileage. It fires right up. idles silky smooth, never overheats, good oil pressure, no hesitation. But once you stat to drive it sounds like da da da da da like a miss. Sometimes it backfires as well when reved at ide;. If you get on it big time on the higway you can feel the miss then for 2 secs to clears up and a ton of power is there (You know your on 8 now) thn it'll go back to hesitation . Although the fuel injectors test ok, can they be bad interanlly?

 

that happened to me and 1 of my spark plugs was rubbing agianst my exchaust manifold...so check it out

 

This has been a problem for the last two years so I have no idea. Plugs are all far away from headers.