Vacuum leak? What's the condition of the emissions kit? This has pipes on
the inlet manifold and if that is open to the atmosphere for any reason you
will get a weak mixture, which is what it sounds like you have. Also if the
plumbing to the float bowl or tank is blocked it can cause fuel problems.
You say you connected the distributor vacuum to the carb instead of the
manifold, the Zenith didn't have a distributor vacuum port AFAIK, but it
does have an EGR valve, crankcase breather, and float chamber overflow port.
If these are not connected to the right places you may well get problems.
----- Original Message -----
From: "bquietroy" <bquietroy@neo.rr.com>
To: <mgb-v8@autox.team.net>
Sent: Monday, December 02, 2002 11:35 PM
Subject: bad MGB, bad bad
> I need some help from all you MGB experts, even though the one I am fixing
for
> someone is a 76 with the original powerplant.
>...
> This thing had no acceleration potential at all. I commenced to reset the
> timing, by connecting the distributor vacuum in front of the throttle
plate
> instead of directly into the intake manifold. ... I also removed the
single Zenith carb and
> cleaned out the bowl of 2 small gobs of red silicone. I cleaned it all up
blew
> out every hole I could find, replaced the diaphragm, set the floats, and
put
> it back on with new gaskets.
> After all this, it is somewhat driveable as long as you do not try and
> accelerate. As you press down on the gas it barely goes and takes forever
to
> get up to any speed. As your speed increases somewhat, and you back off on
the
> throttle slightly you find a spot that it seems to want to accelerate but
> quickly goes back to its shitty self. No guts at all.
> Basically, it seems to lack metered fuel to match the air intake. I tried
a
> new solid state fuel pump and no difference.
///
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