Holley Help!

[Gabe]

Not greatly familiar with Holley carbs, so i'll ask here.
I have a landcruiser with a 3F engine. It's fitted with a Holley twin barrel carb. Not sure on size etc.
It used to run quite well, but all of a sudden it's an absolute pig to start in the morning (temps aproaching zero of late), I have to baby it to warm it up and even once it's warm, it still drives poorly.
When I apply throttle, it hesitates badly. Like it's sort of missing, but not.
Like I said, once it's warm it's better, but still ratshit.
Fuel economy it worse, and I removed the air filter today and it was absolutely black as. Coated in carbon like what you'd see in your exhaust.

Any advice or things I should look for?
What's the best way to set mixtures?

[oldcorollas]

air jets blocked? fuel jets worked their way loose?
open it up and see if there are any bits missing

[love ke70]

sounds like its running pig rich.

never been a fan on holleys myself, but if it was running alright then its either something blocked, leaking, or missing

happy rebuilding

the black would just be oily air comin into the assembly from the pcv, unless of course, its not oily at all and is actually carbonish?

[Gabe]

One thing also, there is a little diaphram pump at the fuel end of the carb (accelarator pump???). When it eventually idles, if I even just touch the actuator arm on it, the car stalls.

Stew, if fuel jets worked loose, wouldn't it just not run?
I'll check in the morning thanks anyway.

Admittedly, I just looked at the 'carbon'. It may be just oily crud.

[legend]

replace the air filter and retune the holley set base idle and set the mixtures
if the air filter is blocked its drowning in fuel