<VV> backfire

[Michael Kovacs]

 It could be a simple as a carb rebuilding (clean the interior passages) or a 
tweak to the timing or a bad intake valve. 


 I thing the pop is a result of the spark firing when the intake valve is partly 
open, allowing the flame to propagate back to the carb for a micro second and 
produce the muffled "pop".

 a lean mixture may do it too.

I'm sure others will contribute options.

 
 MIKE KOVACS 




________________________________
From: "rbeth at comcast.net" <rbeth at comcast.net>
To: Michael Kovacs <kovacsmj at sbcglobal.net>
Sent: Fri, October 8, 2010 3:56:21 PM
Subject: Re: <VV> backfire

I sounds like a "POP"  I could be coming from a Carb. What  would cause that. 
What do I need to do

Thanks a lot

----- Original Message -----
From: Michael Kovacs <kovacsmj at sbcglobal.net>
To: rbeth at comcast.net
Sent: Fri, 08 Oct 2010 19:48:44 -0000 (UTC)
Subject: Re: <VV> backfire

Are you sure it is back fire? It is the is the sound the carbs make when they 
fire back. Sounds like a "POP" . The louder bang is an after fire when fuel is 
ignited in the exhaust system.
 MIKE KOVACS 



----- Original Message ----
From: "rbeth at comcast.net" 
To: virtualvairs at corvair.org
Sent: Fri, October 8, 2010 1:36:55 PM
Subject: backfire

Hello

When i let up onthe gas coming down a hill my car backfires. Not  real loud but 
you can hear it.A mechanic said that  the manifold was leaking at one of the 
cylinders, and that was making it backfire. He told me I needed to find out what 

kind of gasket was used, if any. I just put a Pertronics Ignition on the car. He 

told me that the pertronics was Ok.
Car runs great.

Thanks for the help

Richard Bethard
63 Corvair Conv.
Nokesville, Va

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