Biff,
I had a Herald (33 years ago) that had the same problem... I changed
EVERYTHING on that car including the 948 engine.
It turned out to be a split in a rubber fuel line between the tank and
the fuel pump (on the suck side of the pump). The line ran thru the
right rear fender where it could not be seen. It would only affect the
running at high speed (anything over an idle for a Herald). It would
putter around at low speeds all day but I couldn't get it above 20 MPH.
( I was only 17 at the time and this really pi$$ed me off). After
all, I paid 50 bucks of very hard earned money for a running British
car.......
By the way - it didn't leak gas and it would fill a coffee can with gas
in a hurry if I disconnected the fuel line at the carb and cranked the
engine.
Kevin V.
On May 17, 2005, at 4:42 PM, Biff wrote:
> The other day Jerry Goodman asked for help and received a few replys.
> Now
> it's my turn.
> 948, Petronix ignition, Lucas gold coil, headers, Weber carb. I have
> basically the same problem, i.e., when I hit 3500-4000rpm under load
> (any
> gear) the engine falters and the exhaust sputters like it's firing out
> of
> order. Let up and the engine runs fine below 3500rpm. Starts, idles,
> and revs
> without a load perfectly.
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