carb troubles - Team Camaro Tech
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post #1 of 4 (permalink) Old Jul 31st, 02, 03:16 AM Thread Starter
 
Join Date: Jul 2002
Location: signal hill ca USA
Posts: 7

i've got a #03310 holley 750 vac. sec.it has been running great for a while now.recently now it's bogging ,stumbling when hard acceleration from a standing start,i was able to light the tires up easily now i can't even get them to barely turn. my timing is still @ 10 deg. so i know it's not that.i have been noticing fuel on the secondary throttle plates after the car has been sitting for a while.could the floats be bad, or a bad needle /seat assy on the secondary side.what could cause this it has never backfired ,and always before a couple days ago been running strong.oh i almost forgot the carb has been rebuilt about 3 months ago

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1972 chevy camaro ss 406 sbc 460hp full restification in progress
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post #2 of 4 (permalink) Old Jul 31st, 02, 07:06 AM
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Location: Va Beach VA
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Welcome to the Club!!!

Reading your post, I understand this:
1. Ran good some time ago.
2. Performed carb rework.
3. Now it doesn't work like it used to, correct?

At any rate, my suggestions are to remove sight plugs and reset fuel level, especially front bowl.

Very good symptom given: "...fuel on the secondary throttle plates..." But, you further say after its been sitting a while. If sitting period is within the same day, I would think its fuel coming out the front bowl vent tube and splashing onto the plates during takeoff. That's why I suggested to reset float level, maybe even alittle lower than the sight plug. If it after several days, don't have a clue. Fuel would have evaporated within 24 hours.

If the float level doesn't get it, you might install a Vent Baffle, Holley P/N 26-40, into the front metering block.

I would think alittle more initial timing would help also, i.e., 12-16*.

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Everett 68/350/PG/11.90/115mph
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post #3 of 4 (permalink) Old Jul 31st, 02, 04:12 PM Thread Starter
 
Join Date: Jul 2002
Location: signal hill ca USA
Posts: 7
i also have been smelling fuel 2-3 hours after the engine has last run,i'll look at the secondary side throttle plates that when i noticed fuel on the plates.would to high of float level on the secondary side do this

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1972 chevy camaro ss 406 sbc 460hp full restification in progress
muscl car is offline  
 
post #4 of 4 (permalink) Old Aug 1st, 02, 12:50 AM
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