I just spend 2.00 for a new jet.

 

The stock EFI compensates for atmospheric conditions with the MAP, engine-temp, and intake-air-temp sensors. These operate independent of closed-loop mode, which only works in a small range of operation, mostly idle through the cruise range (below ~50% TP). Once out of that area of the map the EFI is in open-loop mode anyway.

All the PCIII does is intercept the signal and add or subtract fuel to the A/F or advance or retard the ignition timing. The sensors are still functional, so I can't see any validity in those claims.

 

on 07 and 08 pc111 blocks os sensors and keeps u open loop mode

 

So, the question is really, with the O2 sensors disconnected, does the bike still have the other sensors as in earlier, open loop bikes. IF NOT, they may be onto something. Earlier bikes should not be effected.

EZ

 

That doesn't matter. The point I was making is that the PCIII simply adds or subtracts fuel in the A/F tables and advance or retards timing in the ignition tables. The operation of sensors already in place (MAP, engine temp, and intake-air temp) are in no way changed.

 

The sensors used by the ECM in stock mode or with SERT is the same as when a PCIII installed. The only difference is that SERT imparts its changes inside the ECM while the PCIII does it after the fact, but the effect is the same. If you change A/F with SERT or PCIII, the bike will run equally with either when in high altitude or at sea level.