burbling, hmmm
my car runs very strong but when just cruising and under not much of a load it
reminds me of an old perculator, similar to burbling maybe. my plug colors are
right on at full rich and 2 carbs. dashpot oil is ok.
it seems happiest when it's under a little load or most happy floored.
i was starting to wonder if the hopped up cam causes this.
----- Original Message -----
From: "Navarrette, Vance" <vance.navarrette@intel.com>
To: richard.r.olson@faa.gov, 6pack@autox.team.net
Subject: RE: Another A/F mixture question
Date: Mon, 11 Apr 2005 11:54:06 -0700
>
> Richard:
>
> The "lift the air valve" test is insensitive if their are vacuum
> leaks,
> so this is probably why you had poor luck with it.
> Looking at the color of your spark plugs after a brief drive
> (engine
> fully warmed up, choke off of course) is another good method. The spark
> plug
> tip and ground electrode should be a uniform tan color, about the color
> of
> corrugated cardboard. If it is sooty black at all, you are too rich.
> If it has whitish spots, or is white or nearly white, you are too lean.
> If
> you cannot achieve a uniform tan color, you have other issues (vacuum
> leak?)
> that you must correct before you try again.
> For the initial startup, set the needle to the center of its
> travel
> (needle shank is even with the bottom of the air valve).
> Your burbling symptom sounds like your dashpots are low on oil,
> or
> you have a leaking vacuum diaphragm. IMHO, it is unlikely to be related
> to
> mixture.
>
> Vance
>
> -----Original Message-----
> From: owner-6pack@autox.team.net [mailto:owner-6pack@autox.team.net] On
> Behalf Of richard.r.olson@faa.gov
> Sent: April 11, 2005 10:11 AM
> To: 6pack@autox.team.net
> Subject: Another A/F mixture question
>
> I'll ask the question here, everything else is just background:
>
> Is there any way, after a ZS carb rebuild, to tell if the A/F mixture is
> 'good' without using a $$$ commercial tester or building your own ?
> I loaned out my Bentleys, so I forget if there's a procedure to blind
> set
> the mixture prior to installing rebuilt carbs. And I've tried the 'lift
> the air valve and listen to the idle' but results were inconclusive.
>
> <snip>
>
> OK, I'll ask another question: Could this condition be related to too
> rich
> mixture? Which brings me back to my original question at the top of the
> post......
>
>
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