Originally Posted by
Ginge !
think its to retro fit, oh and the later 4x4 cars have a cat to help emissions too but thats nothing to do with it
Most chips did'nt use the closed loop function after std due to the extra and time consuming programing hence why most if not all ran around 2.5/3 % co to run right
This is were MSD took the time to do this as 3% on tickover and crusie was a waste of fuel= bore wash, crappy plugs,rough running etc
which makes for a cleaner running engine which will pass MOT's without a hitch
As said this will only work on tickover and cruise so no more overfueling on tickover and puffing black out the rear
Paul