Most turbo manuals and N/As have the 3wire one, actually it's not a tps, just a 2 position switch, idle and full open. Autos have always the 4wire tps, full variable resistance one. I thought that 20v 4age had 4wire ones.... Also, the 3wire is operating on a D shaped throttle axle, but 4wire one operate on a double latch type axle. When changing to 4wire for a standalone should need the tb also. Else a common colvern type tps will work on the place of 3wire sensor