GOLFII is down.

[static1800]

The blue sensor tells the ecu what temp the car is, it needs to be plugged in. You only have it not plugged in for changing the timing.

Having water shot at them could have shagged them, it sounds like an electrical issue. Like aussieg60 test all the sensors for resistance to see if they are working correctly.

[Spyda]

The blue sensor tells the ecu what temp the car is, it needs to be plugged in. You only have it not plugged in for changing the timing.

Having water shot at them could have shagged them, it sounds like an electrical issue. Like aussieg60 test all the sensors for resistance to see if they are working correctly.

The ONE sensor plug wasnt working before i washed the engine. I replaced both sensors and it didnt change anything. I think its due to only having one plug.

Here are some pics:
The one plug and two sensors.


The engine (dont worry thats not how the plug sits when the car is running)


The only two other wires that come out of hte same sleeve as the plug wires, connected to the top of the oil filter.


Whats the risks of driving it without the blue one pluged in?

[aussieg60]

Looks like your missing the temp sender loom wires going to the ECU as the oil temp sender wires and black temp sender are in the same loom.

You need the blue sender plug loom really for the engine to run proper.

[Spyda]

Looks like your missing the temp sender loom wires going to the ECU as the oil temp sender wires and black temp sender are in the same loom.

You need the blue sender plug loom really for the engine to run proper.

Is it damaging to drive the car without the blue sender pluged in?

How do I conferm that the loom is missing?

How do I fix it?

*EDIT*
Just had a thought. Why would the car not run if I pluged in the plug to the blue one and it send the info to the dash? Wouldnt the car not run properly if bad info was being sent to the ecu?

[aussieg60]

Have you got any wires cut somewhere ? Follow the loom back to the back of the firewall.

The colors would be Brown/White and Brown/Green for the Blue temp sender that goes to the ECU.

Not sure what long term effect it would have on the motor. Just get it fixed.

The wires come out from the ECU main plug at pins 6(brown/white) & 10(brown/green)

[Spyda]

Have you got any wires cut somewhere ? Follow the loom back to the back of the firewall.

The colors would be Brown/White and Brown/Green for the Blue temp sender that goes to the ECU.

Not sure what long term effect it would have on the motor. Just get it fixed.

The wires come out from the ECU main plug at pins 6(brown/white) & 10(brown/green)

Thanks mate, ill have a look when it stop raining. If i cant get it worked out ill take it to volkswerks or some place.

[Spyda]

Looked at the wires coming from the plug and they are brown with green and brown with white. So that means they are for the blue sensor. I pluged it in and everything was fine till the earth cable for the ignition coil came loose (it keeps coming loose while driving).

When this happens does something reset? Because the car wont run properly untill i diconect the blue sensor cable. Then when i plug it in later it is fine.

I dont get it.

And now what about the other white sensor?

[aussieg60]

How is your water temp gauge working then ?
It should be connected to your other sensor (white for you, mines black)
Wire colors should be Red/Yellow and Brown.

[Spyda]

How is your water temp gauge working then ?
It should be connected to your other sensor (white for you, mines black)
Wire colors should be Red/Yellow and Brown.

I have no idea. But it does work.

When i plug in the blue sensor the car doesnt work properly, the idel drops to 750 and if you step on the throttle it coughs and strugles and then turns off. If i unplug it the car will go but no matter how much throttle you give it below 3k rpm it feels like it has lost half its power then comes back like a turbo after 3k rpm.
Funny thing is that it didnt work when i got the car, then it did work after i got the shoks and stuff fited and then when i washed the car it didnt work.

I cant find the other sensor wires or plug anywhere.

Any idea on how to fix the blue sensor problem?

*EDIT*
Ok, had a good look. Found a yellow wire with red stripe and brown wire they are pluged in under, as shown below. Another thing i have to corect is that the wires that are atached to the top of the oil filter dont run in to the same sleeve as the brown/White and Brown/Green for the Blue temp sender. They are two different sleaves cable tied together. One sleave contains the brown/White and Brown/Green for the Blue temp sender and the other contains the wires that are attached to the top of the oil filter and the yellow/red and brown wire.

This is where the yellow/red and brown wire are pluged in to. Any ideas why it is here? Is this normal? how do i fix the blue temp sender problem? are these sensors related?

[aussieg60]

That picture makes a bit more sense now.

What you have is the new OEM flange where the bottom is usually blanked off and the top 2 are usually used for the temp senders on a MK2. Someones, stuck the temp sensor down the bottom, hence you got an extra sender on top (white). I suppose you got a spare or bakup. The bottom connector is your temp sender for your gauge by looking at the color of the wires and that seems to work ok as you say.

Did the car run better with it plugged in the white sensor ? Maybe the blue sensor is faulty ?