QuestionMGB----2 door convertible------1.8l OHV 8v------Sept 1976
The SU fuel pump has been replaced with a facet solid state pump and a Brand new fuel tank. The factory points
ignition system has been replaced with a Crane Cams Fireball XR700 optical trigger. The ignition coil, distributor
cap and rotor are new, as are the plugs and leads.The Zenith Stromberg auto (water jacket bimetallic spring) choke
175 CD-2 single barrel carburetor has been re-built at some point in the past although not by me.
When the vehicle runs it runs well, it will run for anywhere from a couple of seconds to several minutes but it
will always die. When it dies it dies gradually by losing power then stalling, after stalling it will not re-start
for several minutes sometimes hours.
I have removed the carburetor and checked the float valve, which is NOT sticking and everything in the carb
itself is clear and free moving, I have tested the fuel pump by leaving it pumping into a gas can for a substantial
period of time (longer than the car has ever actually ran for) without pause in flow. I am at a loss as to what
could be the issue. I do have one concern regarding the the choke which was not secured and completely out of
adjustment but I do not believe this would cause the symptoms I am describing. if you have any input at all it
would be greatly appreciated- Thank you - Paul
Answerok, i'll just give my thoughts as to what could be wrong in a list.
Fuel tank vacuum (no air getting into tank, when fuel is pumped out it creates a vacuum, eventually the vacuum is as strong as the pump and fuel flow stops)
Coil, though new could be bad.
have you checked the spark when cranking after its "conked out" is the spark present?
