The electric sending unit on Smith/Jaeger oil pressure gauges is notoriously
bad. Every car I've had with one in the past ( 2 Jags, Land Rover, my 83 Range
Rover, etc.), theyve proven unreliable and inaccurate. On my 69 rdstr. I found
a mechanical oil pressure gauge ($15 used) and I am using the copper line I
had stashed away to replace the original elec. sending unit and elec. gauge.
Like the vertical oil filter arrangement of the 69-70 cars, this electric
gauge was replaced by the factory with something better - a mechanical gauge.
As a test try putting a mech. gauge of any type on the end of the flex line
and see what kind of readings you get. Hope this helps. Cheers, Andy Blackley
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