Gauges show wrong readings sometimes

Technical advice Q&A

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rojakilian
Posts: 15
Joined: Wed Mar 02, 2016 4:39 pm
Location: Frankfurt Germany
Germany

#1 Gauges show wrong readings sometimes

Post by rojakilian » Sun May 19, 2019 8:08 pm

Hello Jaguar Gearheads,

i got a 64 3.8 coupe. During the last drives the indications of fuel, water temperature and oil pressure gauges go down and then up again to normal readings simultaniously.
What could be wrong?

Thanks for your help.

Best regards

Robert
:wavegreatbritain:

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cactusman
Posts: 2053
Joined: Wed Nov 14, 2012 11:09 pm
Location: Hertfordshire
Great Britain

#2 Re: Gauges show wrong readings sometimes

Post by cactusman » Sun May 19, 2019 8:52 pm

They are all fed from the same fuse so maybe it is loose?
Julian the E-type man
1962 FHC
1966 MGB....fab little car too

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MSM
Posts: 80
Joined: Wed Jun 22, 2016 8:46 pm
Location: South Bucks, UK
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#3 Re: Gauges show wrong readings sometimes

Post by MSM » Mon May 20, 2019 1:32 pm

Much more likely to be the instrument voltage regulator mounted behind the rev counter. Solid state ones are now available to replace the mechanical version.
Mike

S2 FHC

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