Oil pressure gauge

[joe newsom]

My gage is not working. Is there test that can be done on the gauge and the sending unit on the motor?I am not sure which part is causing the problem.

 

 

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[zKars]

Disconnect the wire from the sender, and ground it to the block. Turn on the ignition (no need to start it) and see if the gauge goes to full pressure. If it does, the gauge is good. 

 

[SteveJ]

The gauge could be tested with the key in the ON position and engine not running. Use a potentiometer in place of the sender. If there is voltage going through the gauge, moving the potentiometer will cause the needle to move.

Was the engine rebuilt? Was the sender removed/replaced? Are you sure all of the connections are correct? Do you have voltage to the gauge? How about voltage to ground at the oil pressure sender? Are the threads clean at the block and sender? 

[joe newsom]

The gauge could be tested with the key in the ON position and engine not running. Use a potentiometer in place of the sender. If there is voltage going through the gauge, moving the potentiometer will cause the needle to move.

Was the engine rebuilt? Was the sender removed/replaced? Are you sure all of the connections are correct? Do you have voltage to the gauge? How about voltage to ground at the oil pressure sender? Are the threads clean at the block and sender? 

The engine was rebuilt. No I did not replace the sender ( in fact I zinc plated it) which left me wondering if that process damaged it. I am pretty sure all connections are correct. I do not know if there about voltage. I need todo some testing and break out the good ole wiring chart.

 

 

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[joe newsom]

Just want to say that this forum has been so awesome!!!


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[hls3073z]

Joe, which Z do you have?  240?

[joe newsom]

240 with a l28


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[zclocks]

Zinc plate process will destroy your unit. 

 

[joe newsom]

Yes I I think you are right


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[joe newsom]

So I put a new oil pressure sensor in and when I turn the key over the sensor slowly pegs out. I have not turned on the motor. Is this normal?


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[siteunseen]

Mine doesn't do that, 240 or the 280.  They stay down like the temp gauge.

[joe newsom]

Hmm


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