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Intermittent Fuel Pump Woes

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Old Feb 2, 2026 | 11:02 AM
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R0xanne's Avatar
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Car: 1984 Pontiac Trans Am
Engine: 5.0L L69 H.O.
Transmission: 700-R4
Axle/Gears: 3.73
Intermittent Fuel Pump Woes

Howdy,

For some reason I can't wrap my head around, my helper fuel pump on my '84 TA works like a champ on cold starts and open-loop, my fuel filter I added is always nearly full and ive got plenty of gas.... buuuuut when it finally warms up and goes into closed loop, it seemingly shuts off entirely and I can no longer hear it priming/running and my carb gets starved of fuel.

I was honestly thinking of tracing the wires from the relay and wiring in a switch onto the dash so that I could manually flip it on- but wiring scares me

Any place I should start looking first?
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