w201 high oil pressure
Can anyone help me diagnose high oil pressure? As soon as I turn the key on, engine off, the oil pressure needle shoots up to 3 bars. I have another sending unit that I swapped in and it is the same problem. When I check the resistance between the sending unit post and ground on one, I get .45 resistance. On the other there is no continuity. So ruling out the sending unit I checked the wiring and I can find no faulty lines.
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Hmmm... My 87 W201 does the same thing. I haven't gotten around to sorting it out yet.
I did replace the instrument panel with a nicer looking one and the oil pressure gauge still does the same thing. I reckon, at least in my case, it's not the instrument panel causing the gauge to malfunction. |
Makes me a little nervous. Just the same as having no oil pressure in my opinion. Makes me think that something is clogged up and oil isn't getting circulated.
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If you take apart the dash pod, observe the coil that is adjacent to the gauge. This is a choke which damps the movement. It's wound on a plastic spool, and the spools become brittle and crack, allowing the coil to short to the case. The easiest solution is to insulate the coil with a bit of tape or shrink wrap.
https://www.peachparts.com/shopforum...s-img_4597.jpg |
My gauge has always run at full max pressure except when at idle. I thought it was good sign and never worried about it. I replaced the sender once and same thing. Full max pressure.
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The gauge is at max with the engine off
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Have you checked for continuity between the brown and white wire from the sender to the cluster?
I am not sure what .45 resistance means, .45 ohms? .45 milliohms? .45 mega ohms? If you are not sure, you could take a 10 ohm resistor, connect it to the brown white wire and the other end to ground, this should pull the gauge to 0 considering the wire is intact. |
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