Holden 202, weber carb, series III poor running

[DazzaTD5]

Hi guys,
Got a love job in at the moment, its a Series III LWB powered by a Holden 202. Ive just fitted a Weber 2 barrel carb (a refurb and jetted to suit a 202) I believe this is the same type of carb used on the old falcon engines?

Anyway, it starts, runs, but is running too rich, on idle its drawing from the secondary, as in if you block the secondary off it will stall. Ive ensured the mechanical linage to the secondary is adjusted right off and the butterfly seems to be completely closed, yet it still seems to be drawing from the secondary port.

Im thinking perhaps the adaptor plate is warped? Hope one of you old school carb wizards has an idea

Cheers

Regards
Daz

[ian4002000]

Can you post some photos of the carby to help identify it ?

[Homestar]

Check to make sure you have no vacuum leaks on the manifold - around the adaptor plate and where it meets the heat. Easiest way is to spray WD40 or similar around all the joints. If the revs pick up at any point then you have a leak which will need fixing before you go any further. If the adaptor plate is warped, a second gasket can sometimes fix it if it is very minor, but if it is out by a lot, then you will need to get it milled flat.

[DazzaTD5]

Ended up removing the adapter plate, brand new and it wasnt flat.
My dad put it on the mill and we soon had it machined flat.

All on, no leaks, drawing as it should, cheers for the ideas guys.

Regards
Daz

[Homestar]

Glad to hear you got it sorted.:)