As you've bttt'd this Stu, I have some technical questions about the closed loop fuelling if i may?

1) What is the highest percentage lambda correction can affect the fuelling? Is it the same in both directions and can this be changed dependant on customer request?

2) What is happening in transient conditions? Is the transition from closed to open loop instant or smooth?

3) Can the PID control parameters (Proportional, Integral, Derivative) be changed on customer request?

4) How do the CO pot and closed loop co-exist? Which is active at idle?

thanks