Quote:
Originally Posted by Stephen Edwin
That's good advice.
At the moment, I was just asking about the MOT calculated Lambda in general.
I'll be looking in to the lean running idea somewhat later.
Life gets on top of me so I go in small steps.  |
As previously calculated, your air:fuel ratio appears to be 15.288:1 rather than the stochiometric/ideal 14.7:1, if correct then this is a fairly serious condition where the excess/free oxygen in a hot environment can cause localised burning and subsequent damage (exhaust valve seats are a common point of damage in an engine that's running too lean). Apart from MoT concerns, this problem really does need to be addressed for the sake of your engine. A handy confirmation is to look at the sparkplugs tips and assess the colour... a milky coffee colour is ideal, while grey/white would indicate lean running.
Good luck with it.