'79 C10: bad cold start, perfect hot start

[twincam1449]

'79 C10. All stock. 350ci V8 with Quadrajet carb.
Stock choke with spiral element.

Warm or hot the engine starts without hesitation within a second.

Cold I have to pump the throttle to use the accelleration pump and start for a couple of seconds.
Choke valve is closed when cold and fully opened when warm/hot.

If it has run for a a minute or so, it starts without problems.
Even after a couple hours it starts fine.

Do you think it's the choke, or could fuel drain back to the fueltank? Which makes it hard to start, as the pump has to pump it back to the carb?

[HotRod73]

Your truck is probably just doesn't like the cold lol.. I have to give me truck one pump of the gas pedal every morning before I start it but thats all she takes...

[flamingbig10]

Sounds like the choke is out of wack, on my truck I have pump gas a few times even if it's a hot day, and a lot when it's cold, but my carburetor is trash

[chappys4life]

Change the choke and see if it helps. Like a $10 part.

[73chevyman]

yea choke i have a manual one and i'm not as good as the original choke gonna call edelbrock and get the electric choke

[willett]

choke is probably haggered.
you don't really need it anyhow. my big block is the same.

i just fire it up and use the trusty old "foot choke" (foot on the gass @ 1500 RPM for a few minutes