<VV> back firing

[Bryan Blackwell]

It sounds like the timing is too far advanced at full vacuum.  I'd  
check the base timing to start, if you have a dial back light or have  
added timing marks you can see what the vac advance is doing.

--Bryan

On Dec 3, 2008, at 1:42 PM, Dorairaj Isaac wrote:

> I have a question. I just put on a set of Grant's reconditioned  
> carbs on my
> 140. The car starts easily and runs great on acceleration, but when  
> I take
> my foot of the accelerator it back fires through the exhaust. What  
> could be
> wrong?