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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Aug 2006 Posts: 28 'Bolter | | 'Bolter Joined: Aug 2006 Posts: 28 | Had a 1954 235 rebuilt for my truck. Everything replaced, rebuilt or new. Runs great, except, when cold, or when mashing the gas at higher rpm, she hesitates and coughs. Fuel lines and filters good, everything good, except the sputtering at higher rpms. Carb adjustment? Timing? What first? The carb was rebuilt along with the motor. Any suggestions would be helpful.
Thanks,
JS | | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | Check the spring tension on the points. It sounds like you're getting "point bounce" at high RPM, resulting in erratic ignition timing. If you're running some sort of aftermarket electronic ignition, all bets are off!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | This also sounds like typical Rochester B performance,
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
| | | | | Joined: Feb 2019 Posts: 4,472 AD Addict & Tinkerer | | AD Addict & Tinkerer Joined: Feb 2019 Posts: 4,472 | Timing or vacuum advance possibly.
Phil Moderator, The Engine Shop, Interiors and Project Journals1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc BrakesProject JournalsStovebolt Gallery Forum | | | | | Joined: Dec 2017 Posts: 1,652 'Bolter | | 'Bolter Joined: Dec 2017 Posts: 1,652 | What kind of air filter are you using?
Mike
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