David,
When does the engine backfire? After hard acceleration, or after shutting
the engine off? Does it backfire through the exhaust or through the carb?
If its through the exhaust then your mixture is too rich. We still need to
know when the backfire occurs to know if the rich mixture is from the
accelerator pump or the main fuel circuit of the carb.
Rich
1970 MGB roadster
from a 45DCOE back to SU's
David Wrote:
>After a lot of help from all of you, my 80B passed emissions. Problem now
>is backfiring! Car has weber downdraft, new plugs, points, runs fine in
>neutral. Under load it's a real eye-opener. Timing was set correctly. Where
>should I start? Too rich, too lean?
>David Wilkinson
>Faculty/Tech. Coordinator
>Edmonds Community College
>20000 68th Ave. W.
>Lynnwood, WA 98036
>(206)640-1722
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