Consider looking for dents or kinks in the metal portions of the fuel line
that could be causing a restriction. Rust from the tank could be jamming up
against insignificant looking dents in the line to the pump causing a
restriction. The inner layer or lining in an old section of flexible fuel
line may be coming unbonded and balooning into an internal restriction at
higher rates of fuel flow. Float height adjustment might be too low in the
carbs. There may be water in the float bowls of your carbs. There may be a
leaf in your gas tank that moves over the outlet at times of higher fuel
demand. Forty degree F or so air temperatures combined with high ambient
humidity, plus high air volume and velocity entering the carb throats could
be causing your carburator(s) to ice up. This icing up is hard to check as
the ice usually has melted buy the time you get to the side of the road and
lift the hood to look. Having the air cleaners off is a given since you've
been trouble shooting your carbs for the last twenty miles.
Jon Hermance, 54 TF 1250 (all the above have happened with this car)
-----Original Message-----
From: BobMGT@aol.com [mailto:BobMGT@aol.com]
Sent: Sunday, April 25, 1999 10:27 PM
To: mg-t@autox.team.net
Cc: mgs@autox.team.net
Subject: TD looses power at speed
When I hit the highway the TD can accelerate to 55 mph all right, but the
car
gradually looses power and can't sustain that speed. If I slow down for a
while, the power seems to come back. I'm thinking the fuel delivery may not
be keeping up with the demand from the carb. Does anyone know of a good way
to check this, or some other problem that may cause this symptom ? The car
has a new fuel pump and the filter is clean.
Bob Donahue (Still stuck in the '50s)
EMAIL - BOBMGT@AOL.COM
52 MGTD - under DIY restoration NEMGTR #11470
71 MGB - AMGBA #96-12029, NAMGBR #7-3336
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