Fuel gauge acting up

[jaydeluxe]

Tank in my Mpi gets signalled as completely empty on fuel gauge when it's still 2/3 full. When I top up fuel tank, reads as full but after a short drive goes to empty again.

Fuel cap seems to looser than previously...

[woody]

MPi fuel gauges are known to be very bad . The first thing to establish is if the sender unit is working over its full range. Remove it ,connect to a multimeter set to ohms and move the arm fully up and down and note the reading going high and low. The reading should be gradual and not take a sudden dive.

[jaydeluxe]

Thanks.

Will have to find my multimeter so...

Will let you know if the sender is the problem.

[Billy]

Having had 2 Mpis, I can tell you that you won't fix the problem. All Mpi fuel gauges are the same. It's easier to keep a note of when you last filled and you should be OK for 250 miles or so before refilling.

[jaydeluxe]

Worked perfectly for years... Could even judge how empty it really was by a fraction of a millimetre of the position of the gauge. Would hate to think it'd never work again.