Frank,
My guess is your front carb is flooding. Perhaps the float valve (needle &
seat) is stuck, or the float has "sunk".
The sooty plugs are a definite clue.
How should an MGB run? Smooth, quiet and powerful.
Firing order is 1-3-4-2, with 1 usually coming from the 1-o'clock position
on the distributor cap - but that's easily changed by re-fitting the drive
spindle in an other-than-original position so don't assume your engine was
put back together correctly last time it was apart. The proper way is to set
the engine with no. 1 piston at tdc on the firing stroke (i.e. with neither
of the rockers on no. 1 cylinder touching their valve stems), then see where
the rotor in the distributor is pointing. That is the terminal from which
the wire to no. 1 cylinder should go.
Lawrie
British Sportscar Center
-----Original Message-----
From: Phillips, Frank <fwp@ufl.edu>
To: 'mgs@autox.team.net' <mgs@autox.team.net>
Date: Monday, July 10, 2000 10:47 PM
Subject: Help, 68 with the shakes
>Listers,
>
>Help!!! Tonight I went to take my 68B out for a spin and was unable to
motor
>out of the drive, rolled back down hill into the garage.
>
>The engine has developed a case of the shakes at higher RPM (any RPM above
>idle). I'm thinking it's a fuel/carb problem??? What are the clasic signs
of
>one carb running lean or rich? My front spark plugs are black with soot
>while the rear two look great. BTW, new plugs do not help the problem. I
did
>put in a Lucas Sport Coil a week ago and have run the car twice since with
>no problem, I've yet to change the plug gaps. BTW2, the engine mounts do
>appear in good order.
>
>Could this be timing? How would I tell?
>
>How should an MGB engine sound/act when well tuned? I've only had the B for
>a month and am never sure if it is happy.
>
>Thanks...
>
>Frank Phillips
>fwp@ufl.edu
>68 MGB
>
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