<VV> no throttle response after stopping

[chuck mckinley]

Good thoughts, but:
1. I'm pretty sure all the carb adjustments are about right, because
most of the time everything works like in the textbooks. It's just "now
and then" (and rarely) that it gives up the ghost for a few seconds.
After it recovers, it's business as usual again for several days.
2. I have to believe there's some sort of intermittent obstruction (or
imminent pump failure) that's causing the problem. Tomorrow I'll take
things apart and look for crud in the bowls and blow out the idle
passages (again), but I plan to leave the needle adjustments alone since
they're working fine 99.9% of the time. I'll definitely take a hard look
at the accelerator pumps.

Chuck

On Sun, 2012-06-03 at 18:12 -0400, Grant Young wrote:
> <<It's been about four months since I did a major carb cleaning & rebuild>on my '63 Monza, and in recent weeks I've begun to experience a behavior that's bound to be carb-related. Very rarely (like once a week) I'll be stopped at a traffic light, and when the light changes, I get no throttle response whatsoever until I pump the accelerator a few times.>>
> 
> Since the problem started after a rebuild, there is probably something related to that. My guesses are: that the float level might now be too low and there is not always enough fuel in the pump cavity for a good pump squirt. BUT, you should get a delayed response even if there was no fuel in the cavity. It would be a "bog", but the carb would work (poorly) even if you remove the pump cup. You can easily check you pump response by looking into the top of the carb (engine off) while operating the accelerator shaft. It could also be that something like a slab or piece of varnish loose in a bowl and is settling over the main jet when you stop for a while at a light. The needle could be getting cocked in the seat and not working properly. I don't think it is loading up, because the usual result of that is that the engine dies (floods) when you try to accelerate. Pumping it and getting it to run would instead indicate a lean condition, so you might try turning the mixture needles
  o
>  ut half a turn at a time to see if it improves.  Hope this helps,
> Grant
>  _______________________________________________
> This message was sent by the VirtualVairs mailing list, all copyrights are the property
> of the writer, please attribute properly. For help, mailto:vv-help at corvair.org
> This list sponsored by the Corvair Society of America, http://www.corvair.org/
> Post messages to: VirtualVairs at corvair.org
> Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs 
>  _______________________________________________