----- Original Message -----
From: Tim Ronak <timinvan@fox.nstn.ca>
To: <tigers-owner@autox.team.net>
Sent: Wednesday, May 26, 1999 11:36 AM
Subject: Re: tigers@autox.team.net digest #560 Wed May 26 03:05:00 MDT 1999
> Roland,
> if indeed the fuel is not pouring out of the carb then the needle and seat
> are fine but it still could be the a low float but my most likely gues is
> the power valvle. If it is unable to hold vacuum or is not seated
correctly
> with a gasket or was replaced with one that has too high of a vacuum
rating
> it will not shut down the main fuel flow circuit and result in a flooding
or
> excess rich condition at idle. The correction would be to test the power
> valve by sucking on it to ensure that the diaphram is not ruptured. If it
is
> OK and shows no cracking then ensure that the vacuum achieved by the
engine
> is sufficient to close the valve at Idle. IE: If the engine only achieves
> 6.5" of vacuum then you would need a 5.5" or lower power valve. If you
have
> cammed up the engine then the vacuum is likely down around 4.5" and you
> would use a 3.5". Be sure to take the car for a run with the vacuum gauge
> and ensure that at 6500+ the vacuum does not start to climb back up, as
this
> would shut off the main fuel supply if the vacuum went higher than 3.5"
with
> a 3.5 power valve THIS WOULD CAUSE A TERMINAL LEAN condition ...VERY BAD!
> Did you change the power valvle with the one in the kit. Most times those
> valves are very high and as a result may not be compatible with a large
CFM
> carb on a small engine that may produce lower vacuum at idle.
> Regards,
> Tim Ronak
> Cochrane, Canada
> timinvan@fox.nstn.ca
>
|