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Old 03-05-2008, 09:26 PM
  #21  
Truckracer
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Default RE: Quadra 52 won't run under 3500 HELP

I am a little unclear about your idle problem. Will it just not throttle below aprox. 3000 with the carb set to idle position or does it die below 3000? If it just won't throttle to below aprox. 3000, then it is probably an air leak problem that has been suggested by several. If it dies below 3000, then it is probably a fuel delivery problem and maybe just replacing the rubber parts in the carb will help .... restore the pump volume, etc. If the engine has set for some time, the idle fuel passages in the carb could be blocked by gum and solidified oil cutting off fuel at low throttle. Several possibilities here. Too bad you don't have somebody nearby with a similar engine you could borrow a carb from.