The Ford Barn

smittykid · 04-25-2017, 02:55 PM

I was just talking to a fellow that has a 29 Speedster for sale. He says after about 100 miles the 1st and fourth spark plugs foul. Two and three are OK. It's carbon fouling-not oil. He's running a MIller High Speed high compression head and a Stromberg 81 carb with an electronic ignition. He can't figure out why it is just the first and fourth plugs that foul. Any thoughts or is there anything else I should be asking? Thanks

SeaSlugs · 04-25-2017, 02:59 PM

is he running too rich? does it run smooth and can low idle without issues?

George Miller · 04-25-2017, 03:06 PM

Quote:

Originally Posted by smittykid

I was just talking to a fellow that has a 29 Speedster for sale. He says after about 100 miles the 1st and fourth spark plugs foul. Two and three are OK. It's carbon fouling-not oil. He's running a MIller High Speed high compression head and a Stromberg 81 carb with an electronic ignition. He can't figure out why it is just the first and fourth plugs that foul. Any thoughts or is there anything else I should be asking? Thanks

He might have a vacuum leak on the intake causing 1and 4 to run lean. Then he might have put larger jets in to get it to run on all 4. We would need to know all the things he has done to it, to know where to look.

Mitch//pa · 04-25-2017, 03:31 PM

Smit

Dont buy it

Jack Richard · 08-18-2017, 05:39 PM

I had the same problem with #1 cylinder only under my Serr-Miller head. I tried everything, nothing worked except very hot plugs fouled in #1 more slowly. The solution was to change the carb/manifold to a Weber 32/36 with new manifold. No more fouling, lots more power now. I think the Winfield SR/winfield manifold was just giving the first cylinder a lot richer mixture than the other 3 cylinders, can't see how but no other explanation seems reasonable.

40 Deluxe · 08-19-2017, 12:53 PM

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Quote:

Originally Posted by Mitch//pa

Smit

Dont buy it

Why not? Anything is fixable!

Big hammer · 08-19-2017, 04:22 PM

Quote:

Originally Posted by 40 Deluxe

Why not? Anything is fixable!

You will not get a answer from him here, he started ford vintage!

04-25-2017, 02:59 PM	#2
SeaSlugs Senior Member Join Date: May 2010 Location: Central, IL Posts: 3,968	Re: Spark plugs carbon fouling is he running too rich? does it run smooth and can low idle without issues? __________________ 1929 Model AA - Need long splash aprons!

04-25-2017, 03:31 PM	#4
Mitch//pa BANNED Join Date: May 2010 Location: Bucks County, PA Posts: 11,454	Re: Spark plugs carbon fouling Smit Dont buy it

08-18-2017, 05:39 PM	#5
Jack Richard Junior Member Join Date: May 2010 Location: Vancouver, WA Posts: 22	Re: Spark plugs carbon fouling I had the same problem with #1 cylinder only under my Serr-Miller head. I tried everything, nothing worked except very hot plugs fouled in #1 more slowly. The solution was to change the carb/manifold to a Weber 32/36 with new manifold. No more fouling, lots more power now. I think the Winfield SR/winfield manifold was just giving the first cylinder a lot richer mixture than the other 3 cylinders, can't see how but no other explanation seems reasonable.

04-25-2017, 02:55 PM	#1
smittykid Senior Member Join Date: Jul 2014 Location: NW Pa./Sc. Posts: 252	Spark plugs carbon fouling I was just talking to a fellow that has a 29 Speedster for sale. He says after about 100 miles the 1st and fourth spark plugs foul. Two and three are OK. It's carbon fouling-not oil. He's running a MIller High Speed high compression head and a Stromberg 81 carb with an electronic ignition. He can't figure out why it is just the first and fourth plugs that foul. Any thoughts or is there anything else I should be asking? Thanks