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Jul 21st, 2025 | | | | Joined: Dec 2006 Posts: 71 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2006 Posts: 71 | I have installed a rebuild kit but still get hesitation on accerlation, any help?
Ridge dweller
| | | | | Joined: Oct 2008 Posts: 121 Shop Shark | | Shop Shark Joined: Oct 2008 Posts: 121 | Had the same issue running a pair of them on a 55 pickup several years ago. Never could figure it out.
1955 Chevy 3100
| | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | have you checked your timing? | | | | | Joined: Aug 2005 Posts: 341 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 341 | With the engine off and air cleaner removed, look down the throat and pump the accelerator to make sure the diaphram is pumping a good stream of gas.
Also, check to see if the throttle shaft is worn and has any play in it which could be a source for an air leak.
Allan
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1951 GMC 1/2-ton
Two 1953 Chevy 3100 5-window
| | | | | Joined: Nov 2002 Posts: 2,715 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,715 | The accelerator pump circuit for the W-1 has:
(A) bracket bolting to throttle shaft with a round hole that becomes elongated
(B) Rod from bracket (A) to cross arm which wears a groove
If either the bracket or the rod wear as above, a hesitation can certainly occur. Replacing these parts often will eliminate a hesitation if the carb is the culprit.
A misfunctioning distributor will also cause a hesitation.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | |
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