My R33 using SRtalk reported my TPS at 8% when idle. It seems to measure voltage like an 02 sensor would. With Conzult-free, it measured 0.42v or something.
So I dunno about these discrepencies...
Those two programs are the easiest to setup and start using right away, OBD and TECU were fussy for me, and TECU didn't support a COM port above 4, so it didn't want to look at my USB consult cable. =-/
Calumsult I never got working.... full package or not.
I'm currently looking into getting the full (Conzult-sx)Conzult program, but at $75 Euro's, it's pretty pricey. =-[ The free version does a lot of monitoring, but I wanted the ECU-learning reset feature and all the other tests such as the HICAS, A/C etc...