Need a little help with carburetor - Pontiac GTO Forum
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post #1 of 8 (permalink) Old 09-21-2019, 01:32 PM Thread Starter
 
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Need a little help with carburetor

66 with 3 duces, been sitting a while. Put in new fuel pump, working great. Can not get gas out of the jets. Plenty of pressure to the bowl as the gas squirts all over the place when I loosen the fuel line to the center carb. didn't see a filter when I disconnected the fuel line to the carb. No matter how many times I manually work the throttle no gas out of the jets. engine will run fine when I manually spray gas in from a spray bottle Any help would be appreciated. Thanks
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post #2 of 8 (permalink) Old 09-21-2019, 02:03 PM
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Stuck needle/seat assembly, possible corrosion in carb blocking passages due to alcohol-laced modern gas. The top of the carb will need to come off to further investigate. Simple job.
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post #3 of 8 (permalink) Old 09-22-2019, 01:29 PM
 
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You could try gently tapping near the fuel inlet on the carb where the needle is to vibrate it loose? Maybe a large screw driver handle or small hammer?
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post #4 of 8 (permalink) Old 09-22-2019, 08:03 PM Thread Starter
 
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Originally Posted by Red Skeleton View Post
You could try gently tapping near the fuel inlet on the carb where the needle is to vibrate it loose? Maybe a large screw driver handle or small hammer?
Thanks, I tried that but no go !!
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post #5 of 8 (permalink) Old 09-22-2019, 08:05 PM Thread Starter
 
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Originally Posted by geeteeohguy View Post
Stuck needle/seat assembly, possible corrosion in carb blocking passages due to alcohol-laced modern gas. The top of the carb will need to come off to further investigate. Simple job.
I guess that is my only option, thanks
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post #6 of 8 (permalink) Old 09-23-2019, 07:37 PM
 
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Maybe try tapping while someone cranks it to create pressure?
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post #7 of 8 (permalink) Old 09-25-2019, 06:18 PM
 
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So when you work the throttle quickly and want a squirt of fuel, you are talking about the accelerator pump, not the main jets.

The main jets feed from vacumn thru the Venturi and usually donít come into play until about 2500 RPM.

You need to check your accelerator pump circuit, the pump is a spring and rubber plunger thing, they differ a little on each carb but you can find them on the web to match yours.

Like the guys says will take a bit of looking into carb......if it runs on the idle circuit after you get it running with a squirt from a bottle you could try some carb cleaner in the tank, and or some carb cleaner spray in the top of the carb air bleeds and Venturi etc.

Gumout Regane is a solvent based cleaner for the gas tank, and has PEA in it a good cleaner.

But best practice would be to look inside and get that accelerator circuit working
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post #8 of 8 (permalink) Old 09-25-2019, 06:56 PM
 
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Of corse make sure your accelerator pump linkage arm is properly hooked up!...if not no squirt of fuel no matter how clean it gets
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