& check the mechanical advance & vacuum advance, these have been known
problems..........
Armand & Lorie Ritchie wrote:
> Chris I would suspect that little burp might be in your Dist. timing. Did
> the mechanic check that?
> Armand
>
> >So, my car is back from the shop, with little improvement. This problem
> >is not new, but I thought that it could eventually be tuned away. Guess
> >not. My mechanic tried various different things (including changing the
> >accelerator pump position), checked for leaks and such, and found no
> >apparent problems with the carbs (Zenith downdraught, 36 WIP3),
> >ignition, timing, or motor in general. This is a real head scratcher.
> >Here's what he thinks might be contributing to the problem: as the
> >carb's come from the factory, they are set so that the initial throttle
> >opening (which is a function of the accel. pump, right?), is very lean.
> >Upon an engine rebuild (which I think mine has had done), the cylinder
> >size is typically increased, so that if the same jet as before is used,
> >the mixture is now too lean, causing the 'burp' that happens with the
> >initial throttle application. Does this make sense? Or is it possible
> >that somewhere along the way the jets in the carb were changed? Short of
> >getting a box of various sized jets and spending a few days on it, is
> >there some 'easy' way to check this? As I said before, other than that
> >little 'burp,' it runs great the rest of the way through the RPM range.
> >Idle is fine, too. Makes a good case for fuel injection...
> >
> >Thanks for all the input!
> >Chris
> >'62 SII
>
> ritchie(at)mcn.org
> Armand & Lorie Ritchie
-- Art Blackwell Denver, CO" Even in the future nothing works " Dark Helmet " Spaceballs "
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 08:59:41 CDT