1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Bucking Bronco

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Old Nov 10, 2006 | 08:26 AM
  #1  
pdbites's Avatar
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Bucking Bronco

85 12A, will only run with choke pulled, won't go over 40 mph, bucks and shakes at speeds, engine revs fine while in neutral or clutch engaged,

would like to see what you guys think
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Old Nov 10, 2006 | 08:29 AM
  #2  
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Rupanrx
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From: MASSHOLE
pics please

is the engine and carb completely stock?
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Old Nov 10, 2006 | 09:12 AM
  #3  
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all stock, had a problem before where it would not idle without the choke pulled, it fixed itself somehow
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Old Nov 10, 2006 | 09:14 AM
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vaccum leak, shutter valve, fuel filter. in that order
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Old Nov 10, 2006 | 10:06 AM
  #5  
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vacuum leak sounds about right, whats the best way to check that
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Old Nov 10, 2006 | 10:08 AM
  #6  
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sounds like a vacuum leak to me.


EDIT:
use a can of carb cleaner.

Last edited by diabolical1; Nov 10, 2006 at 10:11 AM.
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Old Nov 10, 2006 | 11:02 AM
  #7  
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If the lines are brittle replace them all.
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