Ok i just turbo charged my '86 gxl I used my intake manifold and just customized the lower part and made a small exhaust spacer for fuel i used 550 primaries and 680 secondaries and a walboro 255 fuel pump apexi s-afcII and an adjustable fpr. I used stock computer and everything else. Now my problem is when my secondaries come on(or dont come on) at 3800rpm's my car starts missing reall bad, it doesnt even want to rev past that really but when its in neutral it will however i replaced my resistor pack thinking that was it. and i dont know what else to check. sorry to post this but i did read over all the 3800rpm posts and nothing answered my problem.

 

Well, lets see...

Your obviously not getting a secondary signal. Have you tried to ohm out the wires between the injectors and the ECU?

 

ohm out the wires?