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#1
06-19-2023, 05:48 AM
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Tri-Power Issue
I have a tri-power set up on my 421 64 GTO.
I am able to cruise around on the middle carb, but when I floor it the front and back carb sputter and choke and will not kick in. This has happened all of a sudden. In the 5 years I have had the car, it has not been an issue. Any idea of what the problem could be. |
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#2
06-19-2023, 09:04 AM
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Disconnect the linkage from the front and rear carbs.
Remove the air cleaners from the front and rear carbs. Individually, work the throttle on each of the front and rear carbs, looking for a healthy accelerator pump shot. If the pumps are not functioning correctly: If modern non-leather, replace them. If leather, oil and reuse them. Jon
__________________
"Good carburetion is fuelish hot air".  "The most expensive carburetor is the wrong one given to you by your neighbor". If you truly believe that "one size fits all" try walking a mile in your spouse's shoes! Owner of The Carburetor Shop, LLC (of Missouri). Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings. |
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#3
06-19-2023, 07:26 PM
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What Jon said.
That's what I would check first |
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#4
06-25-2023, 06:15 AM
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Both carbs are squirting fuel. Any other suggestions?
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#5
06-25-2023, 04:06 PM
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Would suggest some testing:
ASSUMING mechanical linkage! (1) With the linkage to both secondary carbs disconnected, try flooring with the center carb only. (2) If (1) works, then reconnect the linkage to the rear carb and try flooring (3) If (2) works, then reconnect the linkage to the front and try all three. It might be a linkage issue. It also could well be something in the ignition. Carburetors fail over decades, ignitions fail in the blink of an eye. Basic ignition tests (dwell, timing) might turn up an issue. One other thought: how old is the fuel in the tank? Jon
__________________
"Good carburetion is fuelish hot air". "The most expensive carburetor is the wrong one given to you by your neighbor". If you truly believe that "one size fits all" try walking a mile in your spouse's shoes! Owner of The Carburetor Shop, LLC (of Missouri). Current caretaker of the remains of Stromberg Caburetor, and custodian of the existing Carter and Kingston carburetor drawings. |
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