<VV> Rough Running

[N. Joseph Potts]

Vacuum leaks don't cause flooding (or drips). They cause a too-lean
condition. I think you may have a choke/idle problem. Does the problem vary
at all in connecting with whether the engine in cold or at operating
temperature?

Joe Potts
Miami, Florida USA
1966 Corsa coupe 140hp 4-speed with A/C

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org]On Behalf Of Mike Stillwell
Sent: Monday, June 13, 2005 12:00 PM
To: JKFG717 at aol.com; virtualvairs at corvair.org
Cc: simpsonj at bellatlantic.net
Subject: Re: <VV> Rough Running



 This one really has me stumped. I did the carbs -
twice - tripple clean on very good cores, new Clark's
kits, checked the throttle plate seal, new stone
filters, new choke pull-offs and vaccuum lines.
 First time, it seemed to have a vaccuum leak on pass
side (a drip every now and then, at idle). I replaced
that carb bowl and the insulator - problem went away.
Tuend it up and it great. Jim drove it and it was
terrible - racing at idle, then no power in gear.
 Several local gurus came over and tuned it, as I had
tuned it when it was about 30 degrees outside. Seemed
to be a choke adjustment issue. Also added lower
shrouds and thermostats, which had been missing.
 It has run well after each dose of attention from
several sources, but then seems to fall apart. It
seems to develop a vaccuum leak that allows it to
flood.
 Some off the wall things to consider... a hole in the
balance tube? I replaced the rubber hoses on the
balance tube. Bad modulator? I checked the rubber
vaccuum modulator lines and they felt/looked fine. The
vac. advance tested fine.
 Any other ideas would be greatly appreciated. Reminds
me of Funky's problem on Fast Vair with the '63. Just
when you think you might know what you're doing with
one of these cars...one comes along that just leaves
you dumb-founded.

 Mike
 YS-117

--- JKFG717 at aol.com wrote:

> 66 110 Issues:
>
> We took our 66 110 Monza to a car show yesterday. It
> has rebuilt carbs and a
> Pertronix. Daytime temps in the low 90's. 30 miles
> highway to the show. No
> problems going at all. Car ran well the whole time.
> Upon leaving it was hard to
> start. It had been parked on a level surface all
> day. Stalled out about 5
> times. Ran as if it was stumbling, had to double
> pedal, brake & gas, just to keep
> it going. On the highway it felt weak. Leaving the
> highway it was harder to
> keep running. Went from stumbling, to smooth out, to
> rough, stumbling, smooth,
> etc.
>
> I don't know whether it's card related or ignition
> or something else. Any
> help would be appreciated. Jim CORSA, Group Corvair



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