The Ford Barn

fordv8j · 04-23-2025, 07:55 PM

Does a spacer under carb help; shut car off for a little while; don't want to start

ford38v8 · 04-24-2025, 12:02 AM

Richard, the spacer you ask about is an insulator against heat transfer from the manifold. It provides a minimum benefit in that way, the best method is to open your hood when you park for lunch or whatever, to ventilate the engine compartment, as modern fuel will boil off, evaporate from the carb as well as from the fuel pump while parked, pump loses its prime, carb is dry. Try a squirt bottle directly into the carb vent to give it a head start.

tubman · 04-24-2025, 02:00 AM

If it's a 94 type carburetor, it may be a leaking power valve.

JayChicago · 04-24-2025, 10:06 AM

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In the boiled-off scenario, doesn't start because it's too lean. In the leaking power valve scenario, it's too rich. Suggest you try a hot start with pedal to the floor to pull in more fresh air. If that shows an improvement, indicates was too rich.

04-23-2025, 07:55 PM	#1
fordv8j Senior Member Join Date: Jan 2015 Posts: 392	Carburator spacerdo the spacer under the carb Does a spacer under carb help; shut car off for a little while; don't want to start

04-24-2025, 12:02 AM	#2
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 7,284	Re: Carburator spacerdo the spacer under the carb Richard, the spacer you ask about is an insulator against heat transfer from the manifold. It provides a minimum benefit in that way, the best method is to open your hood when you park for lunch or whatever, to ventilate the engine compartment, as modern fuel will boil off, evaporate from the carb as well as from the fuel pump while parked, pump loses its prime, carb is dry. Try a squirt bottle directly into the carb vent to give it a head start. __________________ Alan

04-24-2025, 02:00 AM	#3
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 11,633	Re: Carburator spacerdo the spacer under the carb If it's a 94 type carburetor, it may be a leaking power valve.

04-24-2025, 10:06 AM	#4
JayChicago Senior Member Join Date: Jan 2019 Location: Chicago Posts: 926	Re: Carburator spacerdo the spacer under the carb Sponsored Links (Register now to hide all advertisements) In the boiled-off scenario, doesn't start because it's too lean. In the leaking power valve scenario, it's too rich. Suggest you try a hot start with pedal to the floor to pull in more fresh air. If that shows an improvement, indicates was too rich.