Fuel gauge resistance

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Keefyboy
Posts: 36
Joined: Tue Jan 05, 2016 9:44 pm
Location: Derbyshire

Fuel gauge resistance

Post by Keefyboy » Wed Nov 23, 2016 11:13 am

Hi I have an aftermarket fuel tank and it uses a VDO type sender, my question is would anyone know the specs on resistance in ohms that the original sender would put out? Any info would be much appreciated, many thanks in advance
Keith

DB RX63
Posts: 682
Joined: Mon Apr 02, 2012 10:52 pm
Location: South East UK

Re: Fuel gauge resistance

Post by DB RX63 » Thu Nov 24, 2016 9:12 pm

I struggled to find the answer to this one, but Car Builder Solutions do a converter that might help:

http://www.carbuildersolutions.com/uk/m ... ge-matcher
Met Blue Series 2 Elford Turbo
S3 Rally Car (under Construction - Still !)

codge
Posts: 2554
Joined: Fri Apr 01, 2011 11:41 am
Location: South Yorks.

Re: Fuel gauge resistance

Post by codge » Thu Nov 24, 2016 10:56 pm

Keefyboy wrote:Hi I have an aftermarket fuel tank and it uses a VDO type sender, my question is would anyone know the specs on resistance in ohms that the original sender would put out? Any info would be much appreciated, many thanks in advance
Keith
Combining data & tolerance from Works Manual for Series 1 and Haynes Manual for Series 2 both say the same:....
Resistance at 'Full' 3 ohms (tolerance +2 -3 ohms)
Resistance at 'Empty' 110 ohms (tolerance +11 -7 ohms)

That explains why gauges fail to 'Empty'......somethings gone open circuit.
Hope that helps.

Keefyboy
Posts: 36
Joined: Tue Jan 05, 2016 9:44 pm
Location: Derbyshire

Re: Fuel gauge resistance

Post by Keefyboy » Thu Nov 24, 2016 11:21 pm

codge wrote:
Keefyboy wrote:Hi I have an aftermarket fuel tank and it uses a VDO type sender, my question is would anyone know the specs on resistance in ohms that the original sender would put out? Any info would be much appreciated, many thanks in advance
Keith
Combining data & tolerance from Works Manual for Series 1 and Haynes Manual for Series 2 both say the same:....
Resistance at 'Full' 3 ohms (tolerance +2 -3 ohms)
Resistance at 'Empty' 110 ohms (tolerance +11 -7 ohms)

That explains why gauges fail to 'Empty'......somethings gone open circuit.
Hope that helps.

That really does help mate, thank you very much, I appreciate you taking the time to look into this, cheers codge

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