I don't know too much about the history of your problem but did you by
chance install a new cam or change the timing chain...? If you played with
any of that you may have reassembled a tooth off. How are your valves? A bad
intake valve would allow a backfire through the carb. Try retarding the
spark a little. Is it a big bang or a constant chopping sound?
Chris Reichle
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From: mgs-owner
To: mg net
Subject: 74 MGB BACKFIRING THROUGH WEBER DGV
Date: Saturday,October 26,1996 11:54AM
Help again please. I think I am making progress with this lawn statue. The
car now will idle and it runs fairly well but it is backfiring through the
weber dgv. It is timed at 17 BTDC at 1500 rpm. The valves are still at .15
and all cylinders appear to be firing. I just have this damn backfire and i
do not know why.
Thanks for any suggestions you might have.
Scott
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