Fuel system - Carburettor Autochoke

Tips on fine tuning the autochoke/s from Covkid:

Autochokes reduce the amount of air entering the carburettor, thereby richening or weakening the mixture according to engine temperature. However, they can be adjusted in a similar way to VW Beetles and others in the v-dub clan.

Refer to part 28 here: http://wiki.club8090.co.uk/index.php/Fuel_system_-_Pierburg

In fact in much warmer weather you can back it right off until it has no effect - saves fuel. Never come across two bi-metalic springs that worked the same anyway and often found an older one worked better than a new one!

Bear in mind that as its a very rough (if not dumb) sensor, it isn't going to be right, all of the time. A summer/winter setting helps match it more closely to ambient and operating temperatures and if its a daily driver you will save considerable fuel doing that. The alternative is a manual one but then people forget to shut them off and theres no gain.

The auto is merely a compromise and one should not assume that it never requires adjustment. You don't want to be messing with it all year - just a general summer or winter setting. You slacken the three screws slightly and adjust accordingly. In use they're supposed to come off within a minute or two but you may find the choke isn't on enough or on too much. Find the sweet spot for summer (ie no choke on a day when it shouldn't need it) and mark it. Do the same when outside temperatures are brassic (on enough to just stop vehicle stalling during initial warm up) and you'll have your own summer/winter settings for your OWN vehicle that work much more efficiently.