Help...90 b2600i running rough....HELP PLEASE

Step daughter has a 90 b2600i that is missing on cylinder 2. I have replaced the plugs, wires, cap, rotor, and injector. I got a reman ecm from oreillys and that didnt change anything. Before I did all that it was missing on both front cylinders. The miss will go away while driving but only for a second or two. I'm lost, please help....thanks

maybe one of the valves aren't fully closing, do a compression test and see what it shows, could also be a cracked head

good luck

Sorry forgot to say that I pulled the head and had it checked and it checked out fine. I did a compression check and it was 150+ not to say it hasn't changed but it should be good enough it would fire.

Problem solved....just because you buy new injectors does not mean they are good...lol found one to be bad.