Unless you remove the TBA from the car and unbolt the idle bypass circuit you won't have got that bit clean. Screwed fully home does not sound right. Certainly, as has been said, a good clean can mean you need to tighten it up a fair bit but you still need some air going through. I can't remember if there is a set screw for the throttle stop, but if so this could have been set to leave the throttle open slightly instead of just closed by someone trying to compensate for a clogged idle bypass circuit. The hole for the vacuum advance is quite small and will also benefit from having the TBA on the bench to clean it out. It is not hard to remove the TBA and makes working on it much less stressful on the back. While it is out you can clean the flame trap and all the associated plumbing as well.
|