I checked the timing. I didn't see where it was off.
I also did a farmer test on the timing gear/chain. I pulled the dist cap, put a socket on the end of the crank and when i turned the crank both ways the distributor turned with it, very little slop. i do know the fuel pump pressure reg is not working properly. (It is new)
There are rubber lines under the hood, i noticed the system was not under pressure the feed line was soft. so i removed the cap from the test port on the injector bar and there was no pressure. So i started it and the feed line was somewhat pressurized.
Shut it down, I used a c-clamp to pinch the return line, started it, it ran really ruff. Shut engine off again, system was pressurized (10 min, feed line hard) until i removed the c-clamp. Which tells me the pressure regulator is not holding system pressure. I will check fuel pump press tomorrow also.
thinking out loud
With the fuel pump pres reg acting the way it is could be starving for gas (missing while underway at operating temp) but would not explain over fuel when temp outside is cold. which leads me back to ecm confused, short circuited or just messed up.
The miss is not a steady constant miss where I could shut off a fuel injector or pull a plug wire to find which cyl. It will miss 5 - 10 times, unless cold out side, in 3 miles.
Tell me truthful, if u think i should stop thinking tell me.
Thanks for the input