1970 Mercury Montego missing as throttle pushed

Tiny
SUPERGIRT
  • MEMBER
  • 1970 MERCURY MONTEGO
  • V8
  • 2WD
  • AUTOMATIC
  • 117,000 MILES
It's a 70 cyclone, the performance model of the montego. I have a miss as throttle is added. The carb has been rebuilt, float levels are good. New plugs, wired, cap, rotor, points and condenser. I installed electronic egnition and that didn't help so I put the points and condenser back in. I've played with float level thinking I was running bordering on flooding because when idling if I shoot carb cleaner in the butterfly, it bogs down. Idle is fine. I have replaced fuel filter going into the carb and added one inline before that because of varnish plugging the auxillary needle. Its a 429 with an autolite 4300 carb. Any ideas? Haven't checked fuel pump pressure but when cranking, plenty of clear-of -debris fuel fills a mason jar. Please help
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Monday, May 31st, 2010 AT 2:53 PM

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Tiny
RASMATAZ
  • MEMBER
Blow the fuel line back to the fuel tank and also check the carb's accelerator pump circuit might not be functioning and also test the fuel pressure
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Monday, May 31st, 2010 AT 5:39 PM

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