<VV> Assistance with a carb problem

[Michael Kovacs]

Bob, 
 Pull the offending carb again and reset the float level. I'd guess the float level is too high or the float seal is not doing the job intended. Also just a technical term, if the sound is in the muffler, it is an after fire and ..........."The engine starts easily and revs fine but has a rough idle.  While at idle, perhaps once or twice per minute and seemingly at random I get a back fire -
more like a loud "phut" through the muffler."

 A true back fire is when the carb goes "bang" with a flame out of it. It can scorch your eyebrows if you are unlucky to be looking into the carb.


 MIKE KOVACS 



----- Original Message ----
From: Bob Gilbert <bgilbert at redshift.bc.ca>
To: corvairs at cybrus.net
Cc: VirtualVairs <virtualvairs at corvair.org>
Sent: Saturday, August 22, 2009 7:59:08 PM
Subject: <VV> Assistance with a carb problem

Hi,



I haven't had a normally aspirated 110 for at least 15 years so my
diagnostic skills are a little rusty and I need some help with the
following.



It's a 68 110 with late carbs with vent valves at the base so they are at
least 64 or later (from memory)



I kitted both carbs, new everything except floats and main jet, set them up
with a 1 1/8 float height and set everything else as per spec. I also added
throttle shaft seals just for good measure

and.........



A look down the RH carb shows the venture cluster dribbling gas which I'm
fairly certain is the source of rough idle and the backfires. There is no
such dribbling out of the other carb 



I've checked the float level and it is definitely at 1 1/8 . Should it be
lower? Or is it something else?



Thanks,

Bob