Erratic oil pressure gauge......
Discussion
Hello chaps,
Just a quickie, on the way back from Le Mans I had a couple of instances when the oil presuure reading would fluctuate between 50psi and 25psi. There seemed to be no particular circumstance to trigger it. I was at high autoroute speeds typically and terrain varied between gentle gradiants or totally flat.
When I dipped the clutch, the oil pressure at idle read 25psi so I knew the engine had oil. I also checked the dipstick and found the oil to be well up the stick.
I am guessing that the sender unit may be going intermittant or there is a cabling issue somewhere. Any ideas how I can check? Last thing I want to do is make any assumptions and find out too late it may be a problem elsewhere.....
Other than this little glitch, the car ran like a dream........
Thanks in advance,
IanM
Just a quickie, on the way back from Le Mans I had a couple of instances when the oil presuure reading would fluctuate between 50psi and 25psi. There seemed to be no particular circumstance to trigger it. I was at high autoroute speeds typically and terrain varied between gentle gradiants or totally flat.
When I dipped the clutch, the oil pressure at idle read 25psi so I knew the engine had oil. I also checked the dipstick and found the oil to be well up the stick.
I am guessing that the sender unit may be going intermittant or there is a cabling issue somewhere. Any ideas how I can check? Last thing I want to do is make any assumptions and find out too late it may be a problem elsewhere.....
Other than this little glitch, the car ran like a dream........
Thanks in advance,
IanM
ianm67 said:
I am guessing that the sender unit may be going intermittant or there is a cabling issue somewhere.
Equally likely.
Connect a voltmeter to sender terminal and see if you can make it vary by moving the wiring/connectors etc. If yes, disconnect the sender wire and repeat by measuring the sender resistance (0-1kohm range).
Did any other instrument move (temperature gauge is the most sensitive to voltage variations - ign switch wiring etc....)
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