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Q & A: 1978 MGB won't stay running

I have a 1978 B with low mileage, nearly all original (full
emmissions) with the exception of electronic ignition. The car won't
stay running. When it is cold, it will start and run for about 1 minute
and then stall. It will start up again and run for about 20 seconds and
stall again. Then it will run for about 5 seconds and stall and won't
start again. New ignition relay and new gulp valve haven't solved the
problem. Anti run-on valve appears to be o.k. (tested according to
Haynes manual procedure). I just recently had the exhaust head replaced
b/c of a bad vacuum leak which reguired re-timing, carb. adjustment,
etc. Car has less than 10 miles on it since that work. I suspect
something related to the vacuum system but don't know where to look.

My comments here are so tardy, that I'm certain you've already found and
corrected the problem. I'd be interested to know just what you encountered
and how you corrected it.

It would seem that there was a vacu... read more