Hi group,
My Rover 416i (1996 P-reg) just failed its MOT due to high CO during the emissions test. When I had it serviced a couple of months ago, the mechanic did tell me that because I mostly use the car for short trips around town and to/from work (only a 15 min trip) that was the reason for the high CO output. I did try taking the car for a run on a 60mph road for about 10-20 mins before the test but obviously that didn't help. So, my question is, should I take it out on a longer run before it's re-test or should I get it checked for a possible problem? The car's not showing any problem signs and did pass all the other MOT check items. For reference here are the figures from the emission tests:
Natural idle: Engine speed: 877 rpm (pass) CO level: 0.27% (pass)
Fast idle: Engine speed: 2700 rpm (pass) CO level: 0.63% (fail - max allowed 0.3 %) HC level: 53 ppm (pass - well below max of 200 ppm) Lambda: 1.01 (pass - almost perfect, should be between 0.95 -
1.09)Second fast idle: Engine speed: 2777 rpm (pass) CO level: 0.68% (fail) HC level: 85 ppm (pass) Lambda: 0.99 (pass - again almost perfect)
I look forward to hearing your views/opinions and thanks in advance for any info you can provide.
Cheers, Salim.