OK... It gets power (+ Positive) From the "main relay"... It gets ground (-) from the ECU...

But the power also goes to Oxygen sensor and "pressure exchange solenoid valve". I think that connects to the MAP sensor.. It's on the same metal bracket as the Boost Solenoid.

So it could be the main relay, OR ECU... Does that sound right?

OK.. The power from the main relay also goes to the Idle Control Valve.. So since it idles OK.. and drives ok..

Is it the ECU then?


Tim.