At the latest dyno day Merv noticed that the standard UK 99 cars were "off-the-scale" on the CO emissions.

Apparently 7% is the norm for a scoob (which is known to overfuel as standard)..both the 99's were over 10%.

Since the fuelling is controlled by software I'm under the impression that nowt can be done.

Maybe the addition of a decent filter would lean it off a bit..any ideas ?

Lee,

The 'norm' is around 10% co, and that is very rich.Some Scoobies do fuel at 7>8%, but they seem to be in the minority.

Air filters don't help,as the ecu senses the increased air flow via the airflow meter,and compensates.Been there, done that.

The only options are to,
1)have a remap (add on board).

2)upgrade the ecu to a re mappable one.

3)or the cheaper option,a gizmo that adjusts the voltage from the air flow meter.There are various companies making these,including HKS,Grid,Greddy,etc',etc', all available in the UK.Cost circa £90 > £120.Quite easy to install (if you're practical) but do need to be set up on the rolling road for safety.

I started off with a gizmo,but have now moved on to a re mappable ecu.The gizmo's work very well, if you buy a good quality one,and set it up correctly.

Mark.