Trust me guys, the VEC-2/3 operates in open AND closed loop, the only question is, if it is capable of doing anything in closed loop. Fuel wise, it is not, the PCM will adapt around it. for IAT and timing, it most certainly is, those are not an adaptable parameter in the PCM.
The VEC's have no idea whether the PCM is in open or closed loop.
The VEC's have no idea whether the PCM is in open or closed loop.