Given that you didn't touch the carb, have you double checked your
timing? Is your dizzy 180 deg out of alignment? They will run that
way, but only horribly...
On Sat, 16 Feb 2002 18:50:34 -0800 (PST), Bob Van Kirk wrote:
> Just joined the list and really have a problem I
>hope someone out there can help me with.
> I have rebuilt a 76 MGB 18V motor with a single
>HIF 6 carb and on what I believe is a Austin Marina
>single casting intake and exhaust manifold. After
>replacing everything and I mean everything in this
>motor including a Moss mild street cam I can not get
>the carb dialed in properly. It has a ABD needle in
>good shape, new throttle shaft, proper fuel pressure (
>2lbs), float adjusted to have about .020 clearance
>from straight edge as directed by the manual, timing
>set at 10 BTC at 1500 RPM per manual, idle jet set for
>best RPM. Engine runs fine in garage but when driven,
>back fires through the exhaust and cuts out with a
>load. At times it even acts as if running out of gas!
> Has 14 lbs fairly steady vacuum at intake and if
>hooked up to the crankcase vent tube engine just dies.
> Carb wasn't touched during rebuild and ran fairly
>well until now. HELP HELP
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