Ford Scorpio Forum - Print Page


    
      
        Ford Scorpio Forum
        (https://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl)
      

        General >> Problems >> fuel tank sender 
        
(Message started by: rob_reznik on May 13^th, 2014, 11:54pm)

Title: fuel tank sender
Post by rob_reznik on May 13^th, 2014, 11:54pm

Have a dodgy fuel guage that drops very quickly and is on empty when there should still be about 35ltrs left - I'm assuming its the sender unit - can they just be bent back to correct this or will it require a new one? - anything else to look out for?

Title: Re: fuel tank sender
Post by TiberiuS on May 14^th, 2014, 10:51am

Rob,

I gotta be honest that I've not done a Scorpio, but on most other similar era Ford products the sender unit is a conductive carbon track with a metal wiper (a bit like a variable resistor) and if you can test the sender, its resistance should be quite linear along its travel.

Yes, it could possibly be suffering from dirty connections on the resistor wafer, most of them are open so you may be able to clean it and possibly bend the wiper contact a bit so it makes good contact.

I'm not 100% sure whether zero resistance means full tank but I remember that it did, so in that case a bad or open circuit at the sender could make the fuel gauge think the tank's empty.

Maybe a new one would be a better plan (I don't know how much Ford charge but I'm guessing it's a King's ransom ;)) so before going that route I'd check it's not a wiring problem elsewhere in the sender circuit.

Hope this helps.

Title: Re: fuel tank sender
Post by Scorpio_Mike on May 14^th, 2014, 12:38pm

Is the sender unit part of the pump assembly ???
Got one somewhere I'm sure...no shed comments please Simmo & GOZZ ;D

Title: Re: fuel tank sender
Post by Simmo on May 14^th, 2014, 3:05pm

As if we would ??? :o :o :o :o ;D

Title: Re: fuel tank sender
Post by gozz on May 14^th, 2014, 8:39pm

on 05/14/14 at 12:38:44, Scorpio_Mike wrote:

Is the sender unit part of the pump assembly ???
Got one somewhere I'm sure...no shed comments please Simmo & GOZZ ;D

Yes Mike it,s all in one expensive lump,and unlike other makes there is no access cover in the boot floor necessitating tank removal.
I will refrain from a shed comment on this occasion ;D

Title: Re: fuel tank sender
Post by rob_reznik on May 14^th, 2014, 10:19pm

Ok thanks - looks like the tanks coming out then!!

Title: Re: fuel tank sender
Post by Scorpio_Mike on May 19^th, 2014, 12:27pm

I have located a spare fuel pump assembly from my 'Storage Facility' ;D

Title: Re: fuel tank sender
Post by Simmo on May 19^th, 2014, 1:36pm

For those unfamiliar with the set up so often commented on by Gozz and Myself it is worthy of note that the search appears to have taken 5 days!! ;D :D

Title: Re: fuel tank sender
Post by Andycan on May 19^th, 2014, 3:14pm

Well it is probably a big shed with parts stacked up from floor to ceiling and right up to the door lol.

Title: Re: fuel tank sender
Post by Scorpio_Mike on May 19^th, 2014, 3:28pm

on 05/19/14 at 15:14:10, Andycan wrote:

Well it is probably a big shed with parts stacked up from floor to ceiling and right up to the door lol.

Correct on all counts !