worrying fuel consumtion

[BlitzBoy]

Lambda sensor as Kev says, I mean even I get 340KMs a tank and thats with going up the strip a few times and I still an 8th of a tank left

[trotter]

With average driving (not particularly trying) and the odd blast to get rid of Porkers, Mercs and the like, i\'m averaging about 16mpg - can get that to around 23-24 on the motorway if I stick to the inside lane!!

As far as the lambda sensor goes, I don\'t have one!!! Failed my MOT for it too!

However, I spoke to Pip about it and he says the difference it makes to fuel consumption is marginal.... Am I right in saying that it tells the ECU how much fuel (or air) is in the exhaust and thus if you\'re running rich or lean??

[BlitzBoy]

yes dont make much difference on a Apexi as you can switch Lamda control off, but if you have a faulty one on a standard ECU giving the signal that its rich all the time then Im quite sure you cruise MPG goes down the toilet