carburetor issue

1983 CHEVROLET SILVERADO
1,000,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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JAYPICKSEMGOOD!77
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Well it runs great and four barrels open just fine but falls on its face when in gear on about a quarter pedal. And the four barrel does not open up In gear.
Aug 15, 2017 at 11:08 PM
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STRAILER
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Hello,

It sounds like you have an accelerator pump that is not working. Remove the air cleaner and with the engine not running use a flashlight to look down inside the primary butterfly's working the throttle open and closed you should see two streams of fuel entering the venturies.

Please let us know what you find.

Cheers, Ken
Aug 16, 2017 at 10:43 PM