Engine Backfires when coasting downhill

Kiwi66 · Post by **Kiwi66** » Sun Apr 19, 2009 1:13 am

G'day guys. Can you help with some suggestions please? I tuned my 66 (with a 1500cc motor) today. Changed the plugs , set contact points gap using the dwell meter (50.5), adjusted the timing, adjusted fuel mix and adjusted idle. The old girl purrs along apart from one problem - it now backfires when I coast downhill at 20-30mph. (There is no pinking) Any suggestions on what I may have done wrong, or how I might rectify the problem would be very welcome. Many thanks. Richard.

crazydaze · Post by **crazydaze** » Sun Apr 19, 2009 7:09 am

Have you checked for holes in the inlet/exhaust/heat exchangers or loose tail pipes?

Alex.

Kiwi66 · Post by **Kiwi66** » Sun Apr 19, 2009 1:30 pm

Hi. Thanks for a prompt reply. Yes, have checked for holes and leaks. None found. Richard