Vance (and everyone else),
Thanks! I had been reading a bit and wondering about the by-pass
valves. We'll have to check them out.
While I'm thinking about it, would there be any chance the vacuum
retard (as in a vacuum retard with a faulty capsule) has any impact?
I bet it is the by-pass valves, but I'm also wondering about the
vacuum retard. Is there a good way to test the vacuum retard?
Once again, thanks!
John V.
On Nov 12, 2007 11:03 AM, Navarrette, Vance <vance.navarrette@intel.com> wrote:
> John:
>
> Your bypass valves are misadjusted. These bleed air past the
> throttle when decelerating to reduce emissions. If they are misadjusted
> they are slow to close and keep the idle speed too high for too long.
> On each carb in turn, turn the bypass screw clockwise until the
> idle speed rises and stays high. Then turn the screw counter clockwise
> until the idle falls to normal, and then turn the screw one additional
> turn counter clockwise. Do not remove the internal star lock washer from
> the screws when making the adjustments.
> The front carb is easy, as the adjustment is out in the open,
> very accessible. The back carb is a pain because the adjustment is
> between the carbs, and the throttle linkage is in the way. You need a
> small screw driver no longer than 1-1/2" for that one. I finally gave up
> and fabricated a small screwdriver from a small nail, which I keep in my
> tool box. Even my jewelers screw drivers were too long. Fortunately, you
> only need to make the adjustment once.
>
> Cheers,
>
> Vance
>
>
> -----Original Message-----
> From: owner-6pack@Autox.Team.Net [mailto:owner-6pack@Autox.Team.Net] On
> Behalf Of John VanNorman
> Sent: November 10, 2007 1:27 PM
> To: 6-Pack
> Subject:
>
> <snip>
>
> When coasting or braking after accelerating, the engine rpms are
> dropping back down very, very slowly - slower than they should. For
> example, if the engine is running at 850 rpms and you hit the throttle
> (either driving or just sitting still), taking the engine up to say
> 2000 rpms, instead of quickly dropping back down to 850, it instead
> slowly slides down, taking 4 to 6 seconds to drop back down to 850
> rpm.
>
> <snip>
>
>
>
>
> Thanks.
>
> John V.
> 1974 1/2 TR6
>
--
www.vannorman.no-ip.org
|