View Single Post
  # 7  
Old 23-06-10, 22:39
dazmatic dazmatic is offline
XT-Moto SuperStar
 
Join Date: Jul 2009
Location: leiston
Posts: 358
dazmatic is on a distinguished road
Quote:
Originally Posted by shards View Post
I bought a Stage 3 filter and PC3 for my 2007 XTR. The O2 sensor had been removed and an eliminator fitted. The dyno shop could not get the PC3 to build a usable map because they said the dyno could not "handle" the fact there was no O2 sensor.
I'm not entirely sure thats true.

I was under the impression that the O2 sensor is there in cases of closed loop operation, in that when the bike is cruising along, and at low RPM, the ECU takes readings from the O2 sensor and leans/richens the fuel ratio regardless making it impossible to build a fuel map.

This is why an O2 eliminator is installed (and the O2 sensor removed) which sends a constant signal to the ECU to keep the bike in open circuit the whole time which can be mapped, to enable the PC3/V to create the fuel map.

So them saying that they can't create a map because theres NO O2 sensor seems contradictory.
__________________
09 XT660X:

CCC Stainless Rounds, Stage 1 DNA, Stage 2 DNA, PCV With Custom Autotune Map, PCV AutoTune, Home made O2 eliminator, Self machined Fork Spacers, DIY Autotune Switch.