the problem i'm having is my 86 z28 with the stock 305 in it will not stay running unless i have my foot on the gas. i just started the car and the idle was real bad i just had a 600cfm holley put on in jan. is the carb making my car run this way? and if so how do i fix it? any help will be great.

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scott

 

your carb may have leaking gaskets and flooding the engine. You can tell by the exhaust smell of raw gas and sooty plugs. This may be because your fuel pressure is too high. What pump are you using?

 

it has the stock pump on it how can i change the pressure? and how hard is it to change the gasket? thanks

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scott

 

that didn't tell me anything. What is the stock pump? mechanical, electric, what?

Holleys have many gaskets that can leak.

 

Maybe the idle speed is just set too low?

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--Steve S--
1984 Trans Am 305 LG4, 5 speed
Daily Driver, Flowmaster 80 Series
Holley 600 cfm & vacuum advance

 

you try adjusting the cables? did you check the vacuum advance? (assuming its vacuum secondaries) ... if your car was backfiring... umm, holley's sorta don't like that tends to blow something or other (I forgot which though, sorry)

 

yeah that's right,
maybe you blew out the thingy that
controls the power enrichment circuit on
a Holley. That can have symptoms
similar to leaky gaskets.

 

i found a leak right at the base of the carb back by the secondary fuel bowl how hard is it to fix this

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scott

 

unless you have an interest in learning Holley rebuilds yourself then I'd say find a reputable carb rebuilder in your area to fix it up.

 

ok thanks. dose the whole carb have to be rebuilt? or just the back half

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scott

 

all that was the problem was the float got stuck open so the guy i took it to just hit it with a screwdriver and it unstuck it so he said if it did it any more just to hit it

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scott

 

hey bigscott, next time you have holley problems get ahold of me. im a holley man, and im just down the street from you in monroe. i rebuild/tune/modify holley carbs.