Technical Punto mk2 1.2 16v 2000 reg non start

[mikesworkshop]

Hi,can anybody help.I have aquired a punto that wont start and on checking through the wiring i think i have found a live wire which is connected to the ecu caseing.It is not earthing out as the caseing is bolted to the throttle body which in turn is bolted to a plastic inlet manifold.
The wire is black in colour with a ring terminal and comes out by the ecu multi plugs,im sure it shouldnt be connected to the ecu casing....
Anybody any ideas or help me out with this ?.
I have been told that the car hasnt run since a used engine was fitted and there are definite signs of the engine replacement.

 

[bredsticz]

I think that's the earth wire for the ecu isnt it?

 

[Xen]

yeh its the ECU earth... it should be connected to the throttle body just below the butterfly valve with a hex-head screw.

 

[bredsticz]

you getting no life at all?
Try putting a jump lead from the negative battery terminal to the engine block.