Just wondered what your AFR does whilst driving around on motorway at a constant speed?

Mine does very little until I accelerate then it goes rich, then drops off the scale again. Is this quite normal, or am I driving around underfueled all the time?

thanks,
Mark

 

What AFR gauge are you using? sounds like a Lambdalink.

I know the Autometer ones show closed-loop, so you'll see a knight-rider effect on cruise with those.

 

I have just fitted my Lambdalink and i have also found it to be giving a random display when at 70 on the motorway and at idle.It does give both green leds under high boost(steady display).
Is this the way this meter works??.

 

Yes - the green LEDS should light on WOT indicating a richer AFR but on cruise the ECU will be in 'closed loop' control (hunting for stoich AFR ~14.7) therefore will be random.

Cheers

 

My Lambdalink only displays the far left green whilst driving WOT or not.On idle its quite erratic though flickers between the greens and oranges,ive heard this is perfectly normal but im not so sure

 

mine is the dawes one.

So its when your giving it some welly, thats where the reading counts? If so, then I'm on overfuelling - which is atleast better than under.

Normal cruising shows blips up and down the meter.