Thread: Weird thing done to 305, what cam is it?

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something I just caught in those pics of the carb. You said it will diesel when you shut it down ? Replace that broken electric solenoid on the front of the carb and set your idle speed with it, it is designed to kick the plunger out with key on and retrack ( or drop the idle speed)with key off, thus fixing the diesel effect.

Originally Posted by HWORRELL

something I just caught in those pics of the carb. You said it will diesel when you shut it down ? Replace that broken electric solenoid on the front of the carb and set your idle speed with it, it is designed to kick the plunger out with key on and retrack ( or drop the idle speed)with key off, thus fixing the diesel effect.

Good eye! And I think what Jerry's saying about your PCV is that it doesn't appear to be sitting straight on your valve cover, like maybe that SS braided hose is a bit short, and it's pulling your PCV cockeyed in the valve cover? If it's cocked it might be a vacuum leak?

Originally Posted by HWORRELL

something I just caught in those pics of the carb. You said it will diesel when you shut it down ? Replace that broken electric solenoid on the front of the carb and set your idle speed with it, it is designed to kick the plunger out with key on and retrack ( or drop the idle speed)with key off, thus fixing the diesel effect.

Good catch.
The motor cannot run-on or "diesel" if the throttle blades are closed completely. An anti-dieseling solenoid is an electro-mechanical device that allows the throttle blades to seat fully closed in the throttle bore so that the motor cannot continue to run when the ignition key is turned off. When the key is turned to the power on position, the solenoid is re-energized and positions the throttle blades so that the motor can idle. Look for an anti-dieseling solenoid that will fit in your bracket or re-engineer the system with a boneyard find. Here's an example of a new unit for a Chevy truck, '68 to '74. A search through a boneyard would likely yield a bracket to mount it to your carb.
1968-1974 Chevrolet K20 Pickup Carburetor Idle Stop Solenoid - Standard Motor Products ES9 - - PartsGeek.com

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