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OIL PRESSURE GAUGE
I have an oil pressure guage that stays at about 3 bar at idle. Once moving on up in the R's, it pegs at 5 bar and stays there till idle again. Anybody have thoughts whether It would be the sending unit or the guage?? if sending unit where is it? thanks
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07-07-2000, 11:26 AM
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What year is your car?
It definately sounds wrong...I'm guessing the figures you gave were with a fully warmed engine? If that's what your getting with the engine fully warmed up then the first thing to check is the oil pressure sender. Its located behind the injection system towards the rear of the motor sort of above the transmission if you were looking down. It's kind of hard to get to...some people say you can get to it by removing your CIS boot (if you have CIS) and using an inspection mirror. At least that would be a start...mine went bad and I ended up dropping the motor about 6" (rear engine mounts only) to gain access. Most people will tell you that on a fully warmed engine your oil pressure should be at approx. 1 bar to 1000 RPM (i.e. ~2 bar @ 2000 RPM. Does this make sense? Good luck, ------------------ Leland Pate ___79 SC Targa [This message has been edited by Leland Pate (edited 07-07-2000).] |
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07-07-2000, 11:49 AM
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It sounds like a bad sender. You don't say what year or model engine so I can't say positively, but on most engines, the sender is on the back, right side of the block above the oil cooler, near the flywheel. If you have a multimeter, either analog or digital, measure the resistance of the sender with the engine off ... it should read less than 20 Ohms. If you want to test the gauge and wiring, try grounding the sender lead with the ignition turned on, but engine not running ... the gauge should read zero. If you substitute a variable resistor (pot or potentiometer) of 5-10,000 Ohms for the sender ... with clip leads, one side of the pot grounded and the wiper lead going to the sender lead to the gauge. As you vary the pot from low resistance to high, the gauge should sweep the full range.
------------------ Warren Hall 1973 911S Targa |
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07-07-2000, 11:52 AM
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