Is the fuel mixture running weak
Is the fuel mixture running weak
Recently I have noticed that I am getting about 60 miles more on a tank of petrol, now getting about 385 per tank. Is the fuel mixture running weak. Is a faulty oxygen sensor? Also, I have noticed a slight misfire when holding low revs in a gear. What do you think?
Re: Is the fuel mixture running weak
I forgot to say that I had an MOT a few days ago and the lamba reading was 1.03, which is right on the limit. Am I right in thinking if the number is greater than 1.0 the fuel mixture is a little weak? The CO and HC levels were also the lowest ever tested for the car