The Ford Barn

John MacDonald · 02-22-2023, 05:13 PM

Would anyone know how my carburetor a Holly 94/59 in my 1948 Ford 2dr would react if my power valve was not working. Car is hard to start and will not idle.Johna

mcgarrett · 02-22-2023, 05:37 PM

From personal experience, if a power valve has failed and is leaking it can cause the float bowl to empty into the intake manifold making the car difficult to start if the car has been sitting for a while, meaning the fuel pump needs to refill the float bowl before the engine will start.

Another scenario is that it can cause a flooded engine condition after being shut off for only a few minutes and then attempting to restart it.

If the diaphragm in the power valve is old and no longer pliable, it can cause a lack of power under hard acceleration due to the fact that it is not opening as it should to provide the additional fuel needed to accelerate.

You mentioned it would not idle - the power valve could have some affect on idle if the power valve is leaking badly enough, but under normal circumstances, the power valve doesn't come into play as it pertains to engine idle.

Seth Swoboda · 02-22-2023, 05:47 PM

As Mcgarrett said, if the power valve is leaking it will cause a rich running and bad idle. The do go bad from time to time. It's an easy fix.

5lugnuts · 02-22-2023, 06:07 PM

I can't remember his name, but there is a man on here who specializes in Holly 94 carbs among other things. He can match a replacement power valve to your car including any modifications you may have done to the engine. Somebody will come up with his name.

scicala · 02-22-2023, 06:17 PM

Quote:

Originally Posted by 5lugnuts

I can't remember his name, but there is a man on here who specializes in Holly 94 carbs among other things. He can match a replacement power valve to your car including any modifications you may have done to the engine. Somebody will come up with his name.

Charlie Schwendler
(716) 662-9159
[email protected]

Lawson Cox · 02-22-2023, 09:08 PM

Sponsored Links (Register now to hide all advertisements)

X2 on Charlie Schwendler. All around good man.

mfirth · 02-23-2023, 08:13 AM

You bet, Charlie's "the man"!

scicala · 02-24-2023, 08:03 PM

I also do these carbs, but Charlie has a lot better parts stash.

Sal

02-22-2023, 05:13 PM	#1
John MacDonald Member Join Date: Mar 2013 Posts: 32	Holly 94 Would anyone know how my carburetor a Holly 94/59 in my 1948 Ford 2dr would react if my power valve was not working. Car is hard to start and will not idle.Johna

02-22-2023, 05:37 PM	#2
mcgarrett Senior Member Join Date: Dec 2013 Location: Waxahachie, Texas Posts: 949	Re: Holly 94 From personal experience, if a power valve has failed and is leaking it can cause the float bowl to empty into the intake manifold making the car difficult to start if the car has been sitting for a while, meaning the fuel pump needs to refill the float bowl before the engine will start. Another scenario is that it can cause a flooded engine condition after being shut off for only a few minutes and then attempting to restart it. If the diaphragm in the power valve is old and no longer pliable, it can cause a lack of power under hard acceleration due to the fact that it is not opening as it should to provide the additional fuel needed to accelerate. You mentioned it would not idle - the power valve could have some affect on idle if the power valve is leaking badly enough, but under normal circumstances, the power valve doesn't come into play as it pertains to engine idle.

02-22-2023, 05:47 PM	#3
Seth Swoboda Senior Member Join Date: May 2010 Location: Southern Illinois Posts: 3,795	Re: Holly 94 As Mcgarrett said, if the power valve is leaking it will cause a rich running and bad idle. The do go bad from time to time. It's an easy fix.

02-22-2023, 06:07 PM	#4
5lugnuts Senior Member Join Date: Aug 2015 Location: Clermont in Central Florida Posts: 111	Re: Holly 94 I can't remember his name, but there is a man on here who specializes in Holly 94 carbs among other things. He can match a replacement power valve to your car including any modifications you may have done to the engine. Somebody will come up with his name.

02-22-2023, 09:08 PM	#6
Lawson Cox Senior Member Join Date: May 2010 Location: Above the gnat line in Georgia Posts: 7,009	Re: Holly 94 Sponsored Links (Register now to hide all advertisements) X2 on Charlie Schwendler. All around good man. __________________ Life is like a roll of toilet paper. The closer to the end, the faster it goes. It is better to be seen, than viewed. "We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".

02-23-2023, 08:13 AM	#7
mfirth Senior Member Join Date: Aug 2017 Location: ohio Posts: 986	Re: Holly 94 You bet, Charlie's "the man"!

02-24-2023, 08:03 PM	#8
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,706	Re: Holly 94 I also do these carbs, but Charlie has a lot better parts stash. Sal