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MG Midget and Sprite Technical - MG midget fuel problems

Hi could you throw some light on my problem
20 miles travelled and no fuel to carbs it's happened 3times
I have fitted new fuel tank , new fuel pump,new in line filter,new fuel line.
On 20 mile road test as I say it packs up.
Could it be sucking air.i don't know.at wits end.
It is a 1977. Mg midget 1500
Regards Paul
Paul

Checked filler cap breather not blocked?
GuyW

As said, most likely the wrong type of filler cap, or faulty breather, in the cap.
As the engine obviously starts again, I presume you have to wait a while before it will run which would indicate the vacuum in the tank reducing to atmospheric pressure, allowing the fuel to be pumped to the engine again.
JB Anderson

mine started sucking air in at the connection to the tank when i fitted a new one turned out to be bad thread on connection
mark heyworth

Has the problem occurred since replacing all the parts, or did you replace the parts in an attempt to cure the problem?

If it is a non-venting fuel cap, when it stops, try unscrewing the filler cap and listen for a rush of air into the tank.
Dave O'Neill 2

Should a UK 77 have a vented cap, or did you have the system vented through a charcoal canister in those days (like the US models)? If it is a closed system, then a non-vented cap may be correct, and the controlled vent system could be plugged up.

Charley
C R Huff

it should be vented, I think Guy's nailed it.
Cheers
Rod
R W Bowers

This thread was discussed between 17/10/2016 and 18/10/2016

MG Midget and Sprite Technical index

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