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Fuel gauge acting up

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jaydeluxe
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Fuel gauge acting up

Post by jaydeluxe » Tue Jun 14, 2016 12:02 am

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...


'01 MPi Cooper

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woody
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Re: Fuel gauge acting up

Post by woody » Tue Jun 14, 2016 8:49 am

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.
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jaydeluxe
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Re: Fuel gauge acting up

Post by jaydeluxe » Tue Jun 14, 2016 9:30 am

Thanks.

Will have to find my multimeter so...

Will let you know if the sender is the problem.
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Billy
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Re: Fuel gauge acting up

Post by Billy » Tue Jun 14, 2016 9:35 am

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
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Re: Fuel gauge acting up

Post by jaydeluxe » Tue Jun 14, 2016 1:29 pm

:cry: 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.
'01 MPi Cooper

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