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914World.com _ 914World Garage _ Oil Pressure Gauge

Posted by: rgolia Apr 15 2019, 02:41 PM

Not sure what happened over the winter, but my oil pressure gauge is now pegged to the right. Worked fine all last driving season. Can a shot sender unit be the cause? Mine is really old.

Posted by: Tom_T Apr 15 2019, 02:45 PM

Try changing to clean oil & cleaning the sender good first, & check the wiring & connectors up to the console gauge. May just be gunked-up.

Tom
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Posted by: SirAndy Apr 15 2019, 02:47 PM

Did you fiddle with the wires? Sounds like you switched the sending unit wire and ground wire on the gauge.

G stands for "Geber" which means sending unit in German, it's *not* ground ...

Posted by: 914Toy Apr 15 2019, 02:47 PM

QUOTE(rgolia @ Apr 15 2019, 01:41 PM)

Not sure what happened over the winter, but my oil pressure gauge is now pegged to the right. Worked fine all last driving season. Can a shot sender unit be the cause? Mine is really old.

My guess, wiring - check connections and then possible grounding.

Posted by: Dave_Darling Apr 15 2019, 03:55 PM

Something electrical--
You unplugged the wire (though I think that would cause a zero reading rather than high)
You smashed the wire somewhere, shorting it to ground
The case of the sender is no longer grounded correctly
You hooked it up wrong

--DD

Posted by: 914Sixer Apr 15 2019, 04:32 PM

Wire touching ground. Sending wire gets brittle from heat, breaks insulation and touches the metal brackets that hold it. Now you have the sender grounded out.

Posted by: bdstone914 Apr 15 2019, 05:36 PM

QUOTE(914Sixer @ Apr 15 2019, 03:32 PM)

Wire touching ground. Sending wire gets brittle from heat, breaks insulation and touches the mental brackets that hold it. Now you have the sender grounded out.

Posted by: bdstone914 Apr 15 2019, 05:39 PM

QUOTE(bdstone914 @ Apr 15 2019, 04:36 PM)

QUOTE(914Sixer @ Apr 15 2019, 03:32 PM)

Wire touching ground. Sending wire gets brittle from heat, breaks insulation and touches the mental brackets that hold it. Now you have the sender grounded out.

Either that or in the sender. Remove the se der wire from the sender. Connect an Ohm meter to the sender terminal G and to ground. If it shows continuity to ground the sender is bad. It should show a low resistance level and change with oil pressure change.

Posted by: rgolia Apr 16 2019, 10:00 AM

Thanks for all the advice. I am going to snoop around and see if anything got messed up. I think I will start by taking the gauge out and wiring it direct to the sender. If it works, that should take a sender issue off the table.

Posted by: Chi-town Apr 16 2019, 10:11 AM

Remove the wire from the sender if the gauge drops it's the sender, if it doesn't the wire is shorted to ground somewhere.