my cossie went for its mot the day and failed on emissions
CO 9.289
HC 2294
the garage has turned it down by the ecu screw since then it is firing out smoke on boost or reeking of petrol on idle the down side tho it seems to stuter if you lift off then put your foot down or if your pulling away from the lights. the car running greys. has anyone had same problem. and what co and hc do you run???? thanks

 

sounds like it's time for a call to a tuner mate

 

it ran fine no stuttering before they adjusted the emissions apart from smell of fuel etc

 

adjusting that screw should be left to people who know what they are doing as it is a global modifier and can affect the fuel in the whole map to some extent, sounds like it needs setting up
my co was that high a few months back it was due to a faulty map sensor that was found and replaced during my set up

my co is now around 0.9% iirc

 

oh and with it now stuttering i would not be ragging it as you will probably melt a piston, plus with that co you will be borewashing and risk damage the engine bearings

 

yep as i said set up time buddy

 

better get rolling road time booked

 

If it's on greys it may now be mapped properly as some of people cannot do so.

Otherwise if it was ok then something has changed, and adjusting the CO is not the answer!

Check the CTS as they can go out of scope and give an incorrect reading, i.e. the signal is telling the ECU it's colder than it is and hence it's fueling for it.

Best thing is a setup as said.

Martin