on my friends untuned 92 turbo hatch, we were connecting all of the sensors up to the engine and found that the green and white wire from the map sensor some how got cut.. we were told that he could tap into another green and white wire and it would still work because the wires were the same color.. we ended up tapping into another wire of the same color and started it up and test drove it.. turns out it wont rev past 5 grand and when crusing at 40 it will start cutting out and back firing...could all of this be because of the wiring or because of it not being tuned or both??
