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Author Topic:   car is loading up off line?
chevy_20
Dirt Roller

Total posts: 5
posted July 31, 2001 09:31 PM
I run a 350 with a holley 4412 2 barrel carb. On starts and restarts my car is loading up (hesitation). I can't figure out what the problem is, the cars a gaining 2-3 car lengths before my car starts acting right. The car runs perfect after that.
Any ideas?

poboy2
Dirt Forum Racer

Total posts: 95
posted July 31, 2001 11:15 PM
Does your carb have a 50cc pump? I have heard more than one person say not to use them.

chevy_20
Dirt Roller

Total posts: 5
posted August 01, 2001 12:05 AM
yes it has a 50cc pump. I don't think that's the problem because i ran several races without any problems. I just started a couple races ago.

CUSTOMPERFORMANCE
Dirt Freak

Total posts: 213
posted August 01, 2001 12:10 AM
contact kinetic performance
he just did my carb and i like it
click on his banner on this forum to contact him

racer2
Dirt Full Roller

Total posts: 29
posted August 01, 2001 08:34 AM
check if the plugs are black,sounds like it could be running rich.

KPLugnut
Dirt Full Roller

Total posts: 57
posted August 01, 2001 09:46 AM
The first places I'd look when this symptom occurs "out of the blue" is whether both your accelerator pump diaphram (and it's whole system) and the power valve are functioning properly, so as to deliver enough (but not too much) fuel when the throttle is first opened, and that the carb is not allowing fuel to dribble from the boosters (evidence of an improperly functioning idle circuit).
The latter of those things is most likely your situation but that's just a guess at this point, since you are saying "loading up" but you may be just describing a viscious stumble when the throttle is first nailed.
Assuming the carb was fine before this symptom, and jetting isn't the cause (unless there was something else changed underneath the carb or the air quality has changed enough to warrant a jet change, then I'd say your situation is in the idle circuit being in need of adjustment (mixture *****s, butterfly position, air bleeds, etc) or your pump shot is messed up or non-existant, or the power valve is blown. AND, all this is assuming you have a handle on both our fuel pressure and float level.

Hope that helps, but I know it's really a vague answer.
Get back to us if you find something along those lines, ok?

KPLugnut
(Kinetic Performance).

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