emissions (M.O.T)

[KINGPRAWN]

recently did the 10 deg timing thing to run 98ron on my 2.1dj...just had the MOT...emmisions are#
CO..........MAX LIMIT 3.5%..............actual 1.41%
HC..........MAX LIMIT 1200ppm..........actual 166ppm

is this good or too good or could i do with a bit more fuel going in???? seems all very low

[..lee..]

@ idle those figures are fine. more importantly is the AFR ratio or lambda as some say. lambda 1 or AFR 14.7 / 1 is ideal @ idle. the hc is just wasted fuel and in your case it is low. which is good shows the burn is pretty good.

[KINGPRAWN]

@ idle those figures are fine. more importantly is the AFR ratio or lambda as some say. lambda 1 or AFR 14.7 / 1 is ideal @ idle. the hc is just wasted fuel and in your case it is low. which is good shows the burn is pretty good.

thanks......

[toomanytoys]

personally, I'd leave it where it is.. unless it spends most of its time at idle.....

After a good run whip a plug out, see what colour it is.. a nice tan brown colour and its fine...