wiring?

Fri Apr 19, 2013 11:23 pm

Hi,

Anyone know where these two plug connectors plug into?

Fri Apr 19, 2013 11:55 pm

Black one - blue temp sensor
Brown one - brown temp sender sensor

Located just to the right outside this picture between the manifold and rocker cover attached on the thermostat.

At least I'm sure that's what it is

Sat Apr 20, 2013 12:00 am

I concur.

Sat Apr 20, 2013 8:26 am

Green wrote:Black one - blue temp sensor
Brown one - brown temp sender sensor

Located just to the right outside this picture between the manifold and rocker cover attached on the thermostat.

At least I'm sure that's what it is

There is already a blue and brown plug connectors already connected there.

Sat Apr 20, 2013 9:26 am

Best bet is to work through this and cross off the ones that are already plugged in:

http://www.e30zone.net/e30zonewiki/inde ... ngine_Loom

But you shouldn't have any plugs like that on that side of the engine unless you've unplugged some injectors.

Sat Apr 20, 2013 10:10 am

Roll the rubber boots back and tell us the colours of the wires.
Are the wires coming from the engine loom, the body loom, or a separate sub loom?

Sat Apr 20, 2013 10:14 am

Brianmoooore wrote:Roll the rubber boots back and tell us the colours of the wires.
Are the wires coming from the engine loom, the body loom, or a separate sub loom?

They are coming from the fuse box.

The rocker cover and intake manifold were removed and powder-coated now that the body-shop put everything back together the car doesn't fire over. Spark is coming through.

Sat Apr 20, 2013 10:46 am

Brianmoooore wrote:Roll the rubber boots back and tell us the colours of the wires.

Sat Apr 20, 2013 1:35 pm

Brianmoooore wrote:
Brianmoooore wrote:Roll the rubber boots back and tell us the colours of the wires.

Traced the wiring and it is going back to this relay circled below...

Sat Apr 20, 2013 1:48 pm

Thought it might be this! Is/was this a 2 litre? There was a problem with some M20 engines over fuelling at startup, which BMW apparently couldn't eliminate with software changes. Their solution, on cars that were submitted with this problem, was to add this small circuit which uses a relay to connect a resistor in parallel with the coolant temperature sensor when the starter motor is operated. This 'fooled' the engine ECU into thinking the engine was already warm, so it didn't inject excessive fuel.
Every one I've come across, I've binned with no ill effects.

Sat Apr 20, 2013 1:54 pm

lion_yo wrote:
Brianmoooore wrote:Roll the rubber boots back and tell us the colours of the wires.
Are the wires coming from the engine loom, the body loom, or a separate sub loom?
They are coming from the fuse box.

The rocker cover and intake manifold were removed and powder-coated now that the body-shop put everything back together the car doesn't fire over. Spark is coming through.

Assuming you've checked fuel is also coming through, and if it was for any reason removed the lines are on the right way on?

Sat Apr 20, 2013 2:02 pm

Green wrote:
lion_yo wrote:
The rocker cover and intake manifold were removed and powder-coated now that the body-shop put everything back together the car doesn't fire over. Spark is coming through.
Assuming you've checked fuel is also coming through, and if it was for any reason removed the lines are on the right way on?

They will have been disconnected, and it's very likely they are now the wrong way around. Disconnect the lines, give the starter a very short pulse, and see which line petrol comes from.
The OTHER pipe goes to the fuel pressure regulator.

Sat Apr 20, 2013 2:22 pm

Brianmoooore wrote:
Green wrote:
lion_yo wrote:
The rocker cover and intake manifold were removed and powder-coated now that the body-shop put everything back together the car doesn't fire over. Spark is coming through.
Assuming you've checked fuel is also coming through, and if it was for any reason removed the lines are on the right way on?
They will have been disconnected, and it's very likely they are now the wrong way around. Disconnect the lines, give the starter a very short pulse, and see which line petrol comes from.
The OTHER pipe goes to the fuel pressure regulator.

The car is a 325i Sport...Which lines are you referring to?

Also just found this two pin plug below anyone know where this connects to?

Sat Apr 20, 2013 2:25 pm

Is it the Carbon Canister connection?

Sat Apr 20, 2013 7:00 pm

lion_yo wrote:
Brianmoooore wrote:
They will have been disconnected, and it's very likely they are now the wrong way around. Disconnect the lines, give the starter a very short pulse, and see which line petrol comes from.
The OTHER pipe goes to the fuel pressure regulator.
The car is a 325i Sport...Which lines are you referring to?

The fuel feed and return lines. The rubber fuel hoses from low down at the back left of the engine bay to the fuel rail on the inlet manifold. One goes straight to the rail and the other to the pressure regulator.