Oil pressure buzzer

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F41XTH
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Oil pressure buzzer

Post by F41XTH »

I took both the rocket covers off to try and diagnose why they were both leaking, I've got new gaskets to put on but took it for a quick errand drive first and now the oil pressure buzzer is sounding 😩 I topped the oil up as it was a little low but still the same. I'm going to replace the gaskets once the weather breaks but it was either unfortunate timing or I've created a new problem!

Any advice please? I've searched here and others have similar issues and there's a lot of suggestions from disconnecting the buzzer to engine swap. The latter is not in the budget right now!
'88 1.9 Petrol WBX

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T3luestar
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Re: Oil pressure buzzer

Post by T3luestar »

You've probably just knocked the cable off going to the pressure sensor between the pushrods. Check everything is still connected.

F41XTH
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Re: Oil pressure buzzer

Post by F41XTH »

Forgive me but I am on a steep learning curve. Is it down there? It feels like what I've seen listed as an oil pressure switch. It has a single yellow cable to it

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'88 1.9 Petrol WBX

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maxstu
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Re: Oil pressure buzzer

Post by maxstu »

I thought the DOP buzzer comes from the oil switch behind waterpump?
MaxStu
1987 2.1 Automatic Carb/LPG Autosleeper.
"Blissfully happy in your presence".

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Robsey
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Re: Oil pressure buzzer

Post by Robsey »

The correct wire for the Dynamic Oil Pressure is indeed the yellow from the sensor behind the water pump pulley.

However both sensors are connected to the buzzer of doom pcb behind the speedometer head.

Pin-out is as follows -
DOP pin 1 = blue wire from alternator D+ terminal

DOP pin 2 = yellow from sensor behind the oil pump (0.9 to 1.8bar)

DOP pin 4 = green from ignition coil #1 terminal

DOP pin 5 = brown to chassis ground.

DOP pin 6 = blue/black to dash LED,and to sensor above left push-rod tubes (0.3 bar)

DOP pin 8 = black ignition live from coil terminal #15.

I hope that helps.
1983 Tin Top with a poorly DF and 4 speed DT box.
1987 Electrics and a DJ engine.
Maybe one day I might get it finished

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