There is an Earth point on the Map Sensor on one of the 3 mounting holes.

Where does this earth come from?

Is it from the loom? if so, where exactly? in the same part of loom that connects to the map sensor near to the map sensor connector?

 

the map sensor has an earth connection that comes from the ecu loom. that loom earths onto the main loom, and also onto the engine at the throttle cable bracket.

hth?

 

So where the the loom wires go to the map sensor connector, is there a seperate Earth wire that comes out of the loom next to this connector?

Ive got the Earth wire connection on the throttle from the loom, but the Map sensor has an Earth point on it, so im wondering what goes onto it?

 

It's earthed at that point through the MAP sensor bracket.

 

Oh i see, so the bolt holding the map sensor onto the bracket is what earths the map sensor itself?

 

Yep, there's no seperate earth strap needed there, just the bolt.