<VV> Re: Poor running 140

[J R Read_HML]

BTW - Take off the air cleaner, rev the engine from the throttle linkage in 
the engine compartment, cup your hand over the left carb so as to create a 
suction.  Do this 3 or 4 times - remove your hand before the engine dies 
each time.  Then see if it will idle normally.  If not, try the same thing 
on the other side.  What you are trying to do here is clear any dirt 
particles out of the carb passages.  If dirt is the problem, this should 
temporarily fix it.  But the dirt is still in there and will likely clog 
again - generally just after turning a corner or just after start up.

Where does the dirt come from?  Dirty tank?  OR - disintegrating accelerator 
pump cups.  When a vair sits a while and the carbs go dry, the modern gas - 
followed by exposure of the rubber cups to air - leads to them falling 
apart.  So long as they stay wet (with gas), the problem does not occur.

If this does not work, perhaps you are in process of loosing a valve seat.

Attachments (if any) are scanned with anti-virus software.

Later, JR

----- Original Message ----- 
From: "J R Read_HML" <hmlinc at sbcglobal.net>
To: "Mel Smith" <my65vair at hotmail.com>
Sent: Wednesday, December 21, 2005 1:54 PM
Subject: Poor running 140


> Dirt in an idle passage of one carb OR a valve seat thinking about falling 
> out.  Probably the first one.
>
> Attachments (if any) are scanned with anti-virus software.
>
> Later, JR
>
> ----- Original Message ----- 
> From: "Mel Smith" <my65vair at hotmail.com>
> To: <virtualvairs at corvair.org>
> Sent: Wednesday, December 21, 2005 1:48 PM
> Subject: <VV> (no subject)
>
>
>> My '65 coupe sat for a few months, then I drove it for a few weeks, then 
>> it sat for a few weeks and when I started it again it sounded really bad 
>> at idle. The engine seemed to speed up through half of a revolution, then 
>> just putt through the second half. It revved okay except there was a kind 
>> of a soft bang every revolution, which seemed to be coming from the left 
>> tail pipe. The engine has 140 heads but two carburetors. Any ideas why it 
>> would suddenly start acting funny like this? I didn't change anything, 
>> but I know the carburetors probably need rebuilding.
>>