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Idle speed on choke

limeyboy

limeyboy

Active Member
I'm sure this is a simple adjustment but I cant think which one!

I have just rebuilt my carb and this is how the engine runs now.



1 - she starts instantly

2 - when she is hot she runs and idles fine



The problem is when she starts the "cold start" speed is low and is on the edge of stalling unless I leave her for a few minutes to warm up.

If I open the primaries then the idle speed is too high when she is warm.

It's an automatic choke and could it be she is a bit rich ( not enough air to burn the fuel?) and if I Lean her off a bit will she run faster on choke?

I've set the A/F screws OK I think as she runs strongly with no hesitancy.



Any ideas?

351 Cleveland / Holley 4150



Thanks
 
Nearby the choke housing is a small screw reacheble from the top which rest on a cam from the choke linkage. There is some where a vid of it on the tube.
My 2 cents.

Verstuurd vanaf mijn SM-A605FN met Tapatalk
 
I've found the screw you mean but it can only be adjusted with a 1/4" spanner from underneath while holding the butterfly fully open.
I'm getting there but it's a mirror job at times!
 
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