fast idle

[kombipete]

Hi

stripped, cleaned and rekitted my standard dual carbs (34 pdsit). Had problem resetting choke, the cams were not lined up the first time which therefore wouldn't hold the throttle open.

nevertheless took them off again and reset so that cams met up, and element holds choke butterfly closed after pump of throttle. I still can't get any fast idle at startup, in fact in won't idle at all. nuts on fast idle linkages are still in factory yellow paint position too and it used to fast idle

what have i missed here? tearing my hair out

pete

[david58]

Hi

stripped, cleaned and rekitted my standard dual carbs (34 pdsit). Had problem resetting choke, the cams were not lined up the first time which therefore wouldn't hold the throttle open.

nevertheless took them off again and reset so that cams met up, and element holds choke butterfly closed after pump of throttle. I still can't get any fast idle at startup, in fact in won't idle at all. nuts on fast idle linkages are still in factory yellow paint position too and it used to fast idle

what have i missed here? tearing my hair out

pete

The fast idle cam works off the setting of the choke element. It has to be in sync.

[kombipete]

Yeah, so so if one cam meets up with second stepped cam and the element is turned either clockwise (anti-clockwise depending on rhs or lhs carb) so that the butterfly is nearly closed then it should work?

[david58]

Yeah, so so if one cam meets up with second stepped cam and the element is turned either clockwise (anti-clockwise depending on rhs or lhs carb) so that the butterfly is nearly closed then it should work?

I think the best answer is when the choke is closed the and the throttle is opened and released it will be on the highest step of the fast idle cam if it is correctly put together.

[kombipete]

Yeah, so so if one cam meets up with second stepped cam and the element is turned either clockwise (anti-clockwise depending on rhs or lhs carb) so that the butterfly is nearly closed then it should work?

I think the best answer is when the choke is closed the and the throttle is opened and released it will be on the highest step of the fast idle cam if it is correctly put together.

David

that is correct, they are the settings I have, but i cannot get it to fast idle (or idle at all for that matter). It idles fine when warm (though there is a miss, and I think there is still a partial blockage in the rhs carb idle circuit), could this blockage be affecting fast idle/cold idle?