jebadiah04

Probably beating a dead horse here somebody probably knows where to find the answer to my problem.

So I fired the truck up yesterday (85 with a 302 efi) moved it. Shut it off. Went start. Fuel pump won't prime.

Here's what I've tested.

Bench tested pump. It works.

Replaced relay. I have power on 2 wires key on. It clicks when keying on then I can hear it click off like normal.

No power to pump. I'm at a loss here. Any help?

jebadiah04

I should also add.when pulling codes I get 10,11 and 15

jebadiah04

Also just to be safe I swapped in my spare fuel pump...nothing.

I'm super confused since the relay is clicking, new relay is clicking. Either the relay isn't getting main power or I have a bad wire from the relay down to the pump. There isn't a magical fusible link somewhere is there?

jebadiah04

after testing everything multiple times, someone on another forum turned me on to the inertia switch. It wasn't tripped so I dismissed it, but after banging my head against a wall for a few hours I finally decided to test it. Unplugged it and jumped the wires and fuel pump primed. Hopefully this can help someone down the road.

Daniel Goodman

Where is the inertia switch? I have an 88' with a 302 efi and it starts and runs fine. After the truck gets good and warm it shuts off with me going down the road. I wonder if I need to change that switch out.

Daniel Goodman

I've changed the cap, rotor and ignition control module. Today I will change the coil and see what happens.

jebadiah04

My inertia switch was above the passengers left foot. But some are above the drivers feet or under passenger side kick panel. I doubt that's your problem though.

Check fuel pressure when warm. Might have a faulty pump or regulator.