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The mkiv Supra Owners Club

whats wrong with my oil pressure gauge?


p3te

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Could be a bad wiring job, a bad sender or a bad gauge, as I often say, you can't beat a good quality mechanical bourdon tube gauge for reliability, simplicity and price. The number of shocking electriocal gauges I see, where the face falls in your lap over a bump, or nothing happens to show start up oil pressure until it's played the Anvil Chorus and swept up and down, bleeped and blinked at you for 10 seconds, is alarming. Gimmicks, sorry, but just gimmicks.

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check the voltage on the output wire going to sensor. this will be a constant value, but will need to be open circuit (not connected) to check, as readings from sensor will adjust voltage due to resistanec.

 

check the linking wire between gauge and sensor, and check the earth for the sensor.

Edited by Noz (see edit history)
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ive got the same gauge mate,

 

i had a problem with mine a few weeks ago, the red light was flashing, and the gage was right the way down asif i had terminal oil pressure. (this was an intermitant occurance)

 

 

it was the wiring to the grey box, take the conenctors out of there, and fiddle them around so they are not twisted.

 

i have my gauges in same location as yours, and there isnt a great amount of room behind there.

 

apart from that, check the wiring to the sensor, and that you havent wired any of the other wires from the grey box to the wrong places

 

 

 

PS the fact that the gauge hasnt been used in a while wont matter, i used the same gauge from my 300zx which was off the road for a good while.

 

 

the gauge should be reading about on number 4kgcm2 when its cold, then when warms up, should be on 1kgcm2, then increase as the revs increase

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