help with AFR

[Gav_Kara]

my R seem to be all over with its AFR and on idle running very lean.. if i pull off maf plug and reconect it runs spot on!!
ive done a code check and all it reads is 55 all clear
when on cruise its going lean to rich and back again all the time
when in boost constantly rich

anyone gpt ideas or is it anything to worrie about or could it just be attmosphire change

 

[Fusion Ed]

Thats normal, your (presumably) monitoring the narrowband lambda sensor, and is supposed to do exactly what you just said.