I had put a air/fuel monitor in my car. I put the signal cable paralel over the wire that comes from the lambda -> ECU.
But the problem is that when the monitor is connected and measuring the air/fuel is seems that the car holds back a lot, more then usual. And today i cut the wire of and the car still holds back, back much less then with the monitor connected.
That because i'm driving to lean (fuelpump is orderd) and i'm trying to drive as much off-boost if i can.
Can anyone axplain me what couse this and maybe how to good readout and driving without putting a second lambda in the exhaust.