I have a similar problem -- idle is about 1500 RPM. When I spray carb
where the butterfly pivot rod exits the throttle body on the
side, the idle drops drastically and becomes very
lumpy, so I assume the bushing
is badly worn.
Question: is there either a replaceable bushing in the throttle
or possibly is there a seal? My fear is that my only option is
the throttle body.
Thank you in advance,