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Author Topic:   SBC cough
RACEINMUD
Member
posted May 22, 2003 10:01 AM
What would cause this: at idle, hit the gas and it almost dies. Apply the throttle slowly and all is fine. Running 2bbl roch on a stock 350 305 heads. 86 holley jets in carb. Any Help? Thanks, Leon


Geffy95x
Member
posted May 22, 2003 10:18 AM
accelerator pump adjustment?


KPLugnut
Member
posted May 22, 2003 11:10 AM
There is probably no accelerator pump shot coming from the booster assembly. If someone changed the booster cluster at some point, it may not be one that has the pump passage machined to match that carb body.
And fwiw, those are abnormally large jets unless the carb is an "outlaw style" 2G....

Let me know if ya need more info on what I'm talking about with the pump passage.

It's a common problem and easily fixed...

KPLugnut


KPLugnut
Member
posted May 22, 2003 11:15 AM
Wait a second, I just realized what carb you're talking about, Raceinmud...The problem is likely to be in the idle circuit adjustment in your case.
Could the butterflies still be too far up the idle transfer slot?
And did you mean to say 76 jets and not 86 jets?

Let me know...

KP


RACEINMUD
Member
posted May 22, 2003 11:50 AM
Hey KP, Ya it's me. I ment 68 jets, that is what came in it. I open for advise. Sometimes this lonewolf stuff stinks. Race


KPLugnut
Member
posted May 22, 2003 11:53 AM
OK, race, that's what I thought. :-)
It's still gotta be in the idle circuit adjustment we were fiddling with before. But also make sure that the minute the throttle starts to move that there is a squirt of fuel coming from the center of the booster assembly. If there is ANY delay in that shot of fuel, that will cause the cough or stumble that you are seeing.
The jetting should be fine for your carb, too.

Talk to ya soon,
KP


RACEINMUD
Member
posted May 22, 2003 04:08 PM
KP, I'll ck it tonite and let ya know. Thanks for the help! Race


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