<VV> Buick 215 troubleshooting question (No Corvair)

[Bill Elliott]

Thanks Jim.

Jim Burkhard wrote:

>
> The symptoms sound to me almost like a bad accelerator pump ; if 
> there's no pump shot on a sudden throttle opening, everything goes 
> lean. But go deep enough in to the throttle and the power circuit 
> comes in, making everything happy again.  Looking down the carb 
> throat, can you see a pump shot?

Yes, pumps works well... and it did before the rebuild as well.

>
> The one thing that bugs me is it sounds like it still falters if you 
> very slowly creep open the throttle while driving... we call this a 
> "crowd" manuever.  Under these conditions, you shouldn't need the 
> accelerator pump to keep life happy since there is no sudden rise of 
> manifold pressure (or drop in vacuum, if you prefer). So under a crowd 
> (say at 2000 rpm in top gear), does it have the problem?

Yes, same problem under these conditions. Falls flat on its face. But 
stab the throttle and she pulls aways smoothly.

>
> I'm not too sharp on the ins and outs of the AFB... maybe somebody 
> else?  You could probably disconnect the secondaries and see if it is 
> the power circuit that comes in saving things or the secondaries... 
> might prove helpful info.

Great idea; I'd not considered that...

>
> curious...
> Jim Burkhard
>
Thanks again!
Bill

>
>


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