Continuing with my restoration I have recently fitted new petrol tank, and a NOS sender unit. Checking the electrics when I turn ignition on the fuel gauge reads full, yet there is no fuel in tank.
One thought the tank is bedded in a mastic to seal it to the bodywork. Could I not be getting a good earth connection.? The leac from the gauge to the sender is all ok. New wiring harness. Any thoughts please. Ty
Fuel tank sender unit
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- Minor Legend
- Posts: 1956
- Joined: Wed Apr 18, 2007 7:32 am
- Location: Düsseldorf, Germany
- MMOC Member: No
Re: Fuel tank sender unit
Test it with a test wire from the sensor unit to earth. If that solves your problem connect it permanently.
Regards
Declan
Regards
Declan
Regards
Declan
Re: Fuel tank sender unit
Thanks Declan.
Another thing that has come to mind is the type of sender unit. I understand that there are two types of sender. I have a gold face speedo and fuel gauge. I read somewhere that the sender unit changed when black faced speedo and gauge were introduced. Is that correct.
I think my sender unit is a later one. Fairly flat top with lucar connector. Could I have the wrong sender for the gauge?
Any help appreciated
Ty
Another thing that has come to mind is the type of sender unit. I understand that there are two types of sender. I have a gold face speedo and fuel gauge. I read somewhere that the sender unit changed when black faced speedo and gauge were introduced. Is that correct.
I think my sender unit is a later one. Fairly flat top with lucar connector. Could I have the wrong sender for the gauge?
Any help appreciated
Ty
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- Minor Legend
- Posts: 2946
- Joined: Tue Aug 25, 2015 6:07 pm
- MMOC Member: No
Re: Fuel tank sender unit
Yup two types of sender (three if , as I believe to be the case the MM had a very early one) roughly divided into Gold faced speedo / fuel gauge and black faced ones. Inevitably the former are more expensive.
https://www.morrisminor.org.uk/parts/26-fuel-system
https://www.morrisminor.org.uk/parts/26-fuel-system
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- Minor Legend
- Posts: 2765
- Joined: Tue Nov 11, 2014 9:41 am
- MMOC Member: No
Re: Fuel tank sender unit
Yes, if your sender has a Lucar connector it IS for the later (black face) gauge. You'll have to obtain the correct sender (or use the black gauge along with a voltage stabiliser I suppose).