85 22RE Pickup Starts then Dies

[moonshine_1952]

My '85 will run off the fuel provided by the cold start injector then die. The fuel pump is on a manual switch so I know it's on, (and it's new so I know it's pumping), the fuel filter is clean, the pressure regulator is operational, and the injectors are all fine. I've tried swapping the igniter, the ECU, and the AFM. Solenoid resistor and fuel system relays are fine, no fuses gone, and I can't find any bad wires. There are no vacuum leaks. I've tested the open circuit module for resistance, but not for voltage at terminal Fp yet. If the Open Circuit module tests okay then where else should I be looking?

There is no measure to how appreciative I would be to someone who could shed some light on this issue for me.

Dan

[texas12]

I doubt that your pickup would run off the cold start injector ONLY. It drips fuel in the throttle body where the injectors spray fuel in the piston chamber.
Someone correct me if I'm wrong. Have you done a compression check?

[moonshine_1952]

Turned out to be a problem with the wiring harness ont he top of the fuel tank. The pump was getting power and was running, but the signal wire back to the ECU wasn't connecting properly, so the ECU didn't think the engine was getting any fuel and therefore was not pulsing the injectors.