Bill -
This usually suggests you have to do a complete tune up. It can be caused
by a myriad of factors but the symptom is partially burned fuel which when
it hits the cold atmosphere gives a pop. Do a complete tune up first and
then see if you still have the symptoms.
Alan
On Tue, May 20, 2008 at 7:43 AM, wpollock@inbox <wpollock@inbox.com> wrote:
> What causes excessive back firing when you lift off the gas,in particular
> if
> you are at speed. Is it misadjusted carbs or timing or both. Whats the
> cure?
>
> Bill Pollock
> 100-6
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