Don Vierling wrote:
> As you may remember, I removed my 1978 MGB's distributor recently and
> after putting it back in - I couldn't get the car to start. It turned
> out to be faulty wiring (i.e, my fault!) between the amplifier module
> and the Piranha electronic ignition pickup.
>
> Well, I finally have the car running again and re-timed, but now I
> still have an occasional backfiring problem (backfiring through the
> carburetor) combined with a hesitation upon acceleration in 2nd gear.
> The car starts and idles fine, acceleration in 1st seems fine, and
> steady driving in 3rd seems OK (steady driving @ about 30-35 miles an
> hour). Just this subtle hesitation and occasional backfire in 2nd under
> "hard" acceleration. I haven't really had the car back up over 40 mph
> yet...I've just been driving around the local streets.
>
> Any suggestions where to start? I replaced the stock Zenith-Stromberg
> carb with one of those single SU HIF44 upgrades from Moss. Do I have
> the mixture set wrong? Do I need to change the needle? Perhaps this is
> still an ignition problem? I was thinking of putting a Pertronix unit
> in, just to rule that out. Any advice or suggestions greatly
> appreciated!
Backfiring through the intake system is almost always from a momentary
lean mixture. I would suggest you check the oil in the dashpot & if it's
full, replace it with a slightly heavier oil.
-Rock http://www.rocky-frisco.com
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