The Ford Barn

Dorf55 · 08-12-2022, 04:48 PM

I have a 55 Fairlane with a warmed over 272 ( bored .60 over, small cam, four barrel carb). I show the car locally, will drive four or five miles to a show with no issues, when I arrive and its time to park (no power steering, three on the tree) and I have to back up and go forward a couple times and take my foot off the gas the car will dye, and I have to pump it for a minute or so and it will finely start. It will sometimes die at stoplights if I don't keep the RPM up.
I'm running stock fuel pump with the wiper inlet pugged off, (no wipers).
I think I need a different fuel pump.. if so what will fit my 272 ? want to stay with a mechanical pump.

Thanks

KULTULZ · 08-12-2022, 05:07 PM

Is carb balance and curb idle set correctly?

I would perform a pressure and volume test on the pump before buying a new one, especially the junk they sell now.

scicala · 08-12-2022, 05:09 PM

It sounds like you just need to adjust the idle speed and mixture screws when it's warmed up.
If that doesn't cure it, maybe a vacuum leak ?

Sal

scicala · 08-12-2022, 05:11 PM

Sorry KULTULZ. I think we posted at the same time.

Sal

KULTULZ · 08-12-2022, 05:19 PM

Quote:

Originally Posted by scicala

... maybe a vacuum leak ?

Sal

A VACUUM TEST GAUGE is your friend ...

Dorf55 · 08-12-2022, 07:24 PM

Sponsored Links (Register now to hide all advertisements)

Thanks !

KULTULZ · 08-12-2022, 07:29 PM

Quote:

Originally Posted by scicala

Sorry KULTULZ. I think we posted at the same time.

Sal

Ain't no problem as you have seniority here ...

Lanny · 08-22-2022, 12:51 PM

It could be a worn out accelerator pump in the carb.

'

poolplayer1 · 08-22-2022, 01:47 PM

Well said Kultulz, about the subject of seniority. By the way, what is the normal Vacuum psi on this 272/292 motors.

KULTULZ · 08-22-2022, 04:58 PM

Quote:

Originally Posted by poolplayer1

Well said Kultulz, about the subject of seniority.

Well, tenure also and his personality is a lot more stable than mine ...

Quote:

By the way, what is the normal Vacuum psi on this 272/292 motors.

Here is a tutorial on manifold vacuum as it will vary from one engine to another, how modified and how much wear -

https://www.freeasestudyguides.com/e...cuum-test.html

dmsfrr · 08-22-2022, 05:11 PM

Quote:

Originally Posted by poolplayer1

... what is the normal Vacuum psi on this 272/292 motors.

On a stock engine normal is in the 19/20 inches of vacuum neighborhood; subject to wear, aftermarket parts, workmanship, regular maintenance, elevation, etc. etc.

Daves55Sedan · 08-22-2022, 11:14 PM

So, you have a dual action pump with the vacuum ports not being used, right?
Then I hope you have metal tubing from the brass intake manifold fitting (located in front of the carb) to the rubber hose poked through the firewall to the vacuum windshield wipers. If the tubing has been removed from that brass fitting, it is a major vacuum leak.

If, the original vacuum tubing for the dual action pump is still there, but disconnected, it does NOT need to be plugged (assuming the vacuum diaphragm is useless). However, any vacuum tubing connected to the intake manifold that has openings plugged with a rubber vacuum cap should be checked at least once a year for cracks in the rubber especially at the end of the cap. If you squeeze the end of the rubber cap and see a crack, replace the cap with a new one and clamp it to the tubing with a small nylon cable tie pulled tight.
Not sure what it takes to pull the top off a 4-bbl carb like yours, but on the little 2-bbl carbs they had that year, it takes less than 5 minutes to pull the top off the carb so you can clean the fuel inlet needle with gumout spray. Look down at the bottom of the bowl. If there is sediment visible down there, wipe it out clean and install a new gas filter.

08-12-2022, 04:48 PM	#1
Dorf55 Member Join Date: Jan 2014 Location: Omaha Ne. Posts: 34	Show stopper I have a 55 Fairlane with a warmed over 272 ( bored .60 over, small cam, four barrel carb). I show the car locally, will drive four or five miles to a show with no issues, when I arrive and its time to park (no power steering, three on the tree) and I have to back up and go forward a couple times and take my foot off the gas the car will dye, and I have to pump it for a minute or so and it will finely start. It will sometimes die at stoplights if I don't keep the RPM up. I'm running stock fuel pump with the wiper inlet pugged off, (no wipers). I think I need a different fuel pump.. if so what will fit my 272 ? want to stay with a mechanical pump. Thanks

08-12-2022, 05:07 PM	#2
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,475	Re: Show stopper Is carb balance and curb idle set correctly? I would perform a pressure and volume test on the pump before buying a new one, especially the junk they sell now. __________________ *** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ... DIAGNOSED CDO** - (OCD In Correct Alphabetical Order)

08-12-2022, 05:09 PM	#3
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,706	Re: Show stopper It sounds like you just need to adjust the idle speed and mixture screws when it's warmed up. If that doesn't cure it, maybe a vacuum leak ? Sal

08-12-2022, 05:11 PM	#4
scicala Senior Member Join Date: Jun 2010 Location: Detroit suburb, MI Posts: 3,706	Re: Show stopper Sorry KULTULZ. I think we posted at the same time. Sal

08-12-2022, 07:24 PM	#6
Dorf55 Member Join Date: Jan 2014 Location: Omaha Ne. Posts: 34	Re: Show stopper Sponsored Links (Register now to hide all advertisements) Thanks !

08-22-2022, 12:51 PM	#8
Lanny Senior Member Join Date: May 2010 Location: Mn Posts: 2,411	Re: Show stopper It could be a worn out accelerator pump in the carb. ' __________________ If mama ain't happy, ain't nobody happy. But if daddy ain't happy...RUN

08-22-2022, 01:47 PM	#9
poolplayer1 Senior Member Join Date: Sep 2015 Posts: 399	Re: Show stopper Well said Kultulz, about the subject of seniority. By the way, what is the normal Vacuum psi on this 272/292 motors.

08-22-2022, 11:14 PM	#12
Daves55Sedan Senior Member Join Date: May 2010 Location: Granite City, Illinois Posts: 3,008	Re: Show stopper So, you have a dual action pump with the vacuum ports not being used, right? Then I hope you have metal tubing from the brass intake manifold fitting (located in front of the carb) to the rubber hose poked through the firewall to the vacuum windshield wipers. If the tubing has been removed from that brass fitting, it is a major vacuum leak. If, the original vacuum tubing for the dual action pump is still there, but disconnected, it does NOT need to be plugged (assuming the vacuum diaphragm is useless). However, any vacuum tubing connected to the intake manifold that has openings plugged with a rubber vacuum cap should be checked at least once a year for cracks in the rubber especially at the end of the cap. If you squeeze the end of the rubber cap and see a crack, replace the cap with a new one and clamp it to the tubing with a small nylon cable tie pulled tight. Not sure what it takes to pull the top off a 4-bbl carb like yours, but on the little 2-bbl carbs they had that year, it takes less than 5 minutes to pull the top off the carb so you can clean the fuel inlet needle with gumout spray. Look down at the bottom of the bowl. If there is sediment visible down there, wipe it out clean and install a new gas filter.