First ;
Do a full _HOT_ valve adjustment .
Then , test the vacuum advance ' biscuit ' on the dizzy to ensure it's holding
vacuum .
Is the timing set to ball on pointer @ 600 RPM's ? . there must be no vacuum
signal to the dizzy when the engine is idling .
-Nate
Dennis wrote:
>
> Hi Guys,
>
> My stock '54 235 has a problem. It runs like the accelerator pump doesn't
> work, but when looking down the throat and operating the throttle I see a
> strong jet of gas, indicating that it does.
>
> After driving several miles and fully warmed up, pressing the accelerator too
> far too fast produces in an impressive backfire through the carburetor,
> particularly at low RPM.
>
> The timing is correct and it runs great in every other way. Any ideas?
>
> Thanks,
> Dennis
> 1953 3100 with 1954 235
>
------------------------------------
Ole Chevy and GMC trucks rule!
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