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04-16-2010, 04:28 PM
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#1 |
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Registered User
Join Date: Jan 2002
Location: Texarkana, Texas
Posts: 261
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one barrel carb?
Truck has a 250 out of a 70 something Old,s. HEI, etc. Rebuilt the carb yesterday because it was loading up. I tried to set it with a vacuum gauge today. The air/ fuel mixture screw does nothing. I can turn it all the way in or out with no change. Just drove it and it is still loading up. What am I missing? thera are vacuum ports that are capped and the one port on top by the air horn that is open but it has no vac. so i assume it is fine.
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1961 Apache short step. Last edited by sixbangr; 04-16-2010 at 05:09 PM. |
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04-17-2010, 05:38 PM
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#2 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
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Re: one barrel carb?
There are 2 different gaskets that go between the throttle body & fuel bowl. Make sure you have the right one & it is turned in the right direction. Is the float level correct & the metering rod link hooked up & adjusted? Make sure the metering rod & spring are on the holder correctly.
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04-17-2010, 05:59 PM
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#3 |
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Registered User
Join Date: Jan 2002
Location: Texarkana, Texas
Posts: 261
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Re: one barrel carb?
I have the correct gasket, I double checked when I did it. All adjustments are by the instructions. If I spray carb cleaner on it , it revs up. I can spray just about any where and it does it. I assume it is time to upgrade to a 2 barrel.
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1961 Apache short step. |
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04-18-2010, 07:09 AM
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#4 |
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Six in a row makes it go...
 
Join Date: Mar 2009
Location: Vacationland: Maine
Posts: 1,346
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Re: one barrel carb?
You've got a vacuum leak somewhere. Are all the vacuum ports plugged?
__________________
67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce |
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04-18-2010, 08:06 AM
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#5 |
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Registered User
Join Date: Jan 2002
Location: Texarkana, Texas
Posts: 261
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Re: one barrel carb?
all the extra ports are pluged.
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1961 Apache short step. |
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04-18-2010, 08:26 AM
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#6 |
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Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
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Re: one barrel carb?
I bet if you spray at the throttle shaft you`ll find out that is where your excessive play is, you can have the shaft knurled and he body bushed if you want that carb, excessive spring pressure and or age wears them out.
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`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
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