Giant dead spot on holly carb.

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Giant dead spot on holly carb.

Post  racinghabbit on June 28th 2014, 11:39 pm

mud racing... go to take off on green and smash the pedal to the floor and the engine cuts right out for like 2 seconds then goes like a raped ape..... holley 750 with vacuum secondaries.
any idea's?
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Re: Giant dead spot on holly carb.

Post  bosshoss on June 29th 2014, 11:42 am

Lean Stumble.

Possible causes, NO or not enough accelerator pump shot.

Some fool puts a screw in the mechanism on the vac secondary linkage to force them open.

Lean idle mixture.

Low float level.

There are more..

Smile

dkp
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Re: Giant dead spot on holly carb.

Post  Dave C. on June 29th 2014, 12:56 pm

If you are not leaving from an idle, you're using up a lot of pump shot.

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Re: Giant dead spot on holly carb.

Post  cool40 on June 29th 2014, 1:17 pm

Another thought if you run a vac advance be sure its on the right port.
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Re: Giant dead spot on holly carb.

Post  70FB on June 29th 2014, 6:12 pm

Really bad vacuum leak??
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Re: Giant dead spot on holly carb.

Post  460bronco on June 29th 2014, 10:22 pm

Is this a new problem that started out of nowhere, or is it a result after swapping a few parts?
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Re: Giant dead spot on holly carb.

Post  racinghabbit on June 29th 2014, 11:51 pm

was way to lean all the way around
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