No power to fuel pump 88 tbi 350

SlowZ71 · Apr 27, 2021

DerekTheGreat said:
Beautiful truck, love love love the color scheme. Get the original alloys from the era and that'll set it off.

What were the original alloys? Those 6 spoke ones? I’ve got a complete set of Steelies with caps and trim rings I need to sand blast and get repainted since those are what it had from new. I want to bring it as close back to the way it was when I was a kid, and I’m even debating putting on the old man extruded aluminum running boards again like it had before.

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Eveready · Apr 27, 2021

Putting in a battery removes that variable from the "chase the gremlins" equation. Who knows, some of the bugs might cure themselves. On a truck that has been sitting so long I would also suggest checking every ground on the truck, then fuses etc. Good luck and keep us posted. Good looking truck.

DonYukon · Apr 27, 2021

As stated a new battery would be my first go. but have you checked the fuse and relay? Relays typically dont go bad but they are quick to discount , and did you by chance use a multimeter and check the continuity ?

SlowZ71 · Apr 27, 2021

DonYukon said:
As stated a new battery would be my first go. but have you checked the fuse and relay? Relays typically dont go bad but they are quick to discount , and did you by chance use a multimeter and check the continuity ?

I haven’t checked the relay, but I know the fuse is good. I have a multimeter and that’s how I found only 2 volts from the orange wire I believe. Haven’t checked for continuity yet either, but I’ll check that as soon as I install a new battery.

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SlowZ71 · Jan 23, 2022

Small update. Finally got around to buying a battery for it. My friend was parking his mustang before the next storm and he said he could smell fuel, but I still need to replace the fuel filter, in case it’s not getting enough fuel through the filter in it currently. The pump doesn’t prime with the key on, but I can hear it priming when I turn the key off. That doesn’t seem correct to me…

Schurkey · Jan 23, 2022

SlowZ71 said:
Finally got around to buying a battery for it.

Good plan. It's pointless to do voltage testing when the battery is dead.

SlowZ71 said:
I still need to replace the fuel filter, in case it’s not getting enough fuel through the filter in it currently.

Not a bad idea.

SlowZ71 said:
The pump doesn’t prime with the key on, but I can hear it priming when I turn the key off. That doesn’t seem correct to me…

That is not correct. Very unusual fault. Good luck.

SlowZ71 · Jan 24, 2022

I found that GM fuel injection manual in the stickies section, gonna start running down the trouble trees first.

GoToGuy · Jan 24, 2022

You found the fuel injection service manual. How about stating with fuel pump circuitry get the pump working first. Less than 9 volts relays dont work.

SlowZ71 · Jan 24, 2022

GoToGuy said:
You found the fuel injection service manual. How about stating with fuel pump circuitry get the pump working first. Less than 9 volts relays dont work.

I don’t even have an ses light come on when the key is cycled on. Starting with that first, will pick it back up in the morning.

Dariusz Salomon · Jan 24, 2022

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No power to fuel pump 88 tbi 350

SlowZ71

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Eveready

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DonYukon

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