Hi all

just had new denso spark plugs as it was time for new plugs. Also had new lambda sensor recently too.

My car for past few months has been running rich and yat the plugs, coils, lambda are all tested and a.o.k.
Could my maf sensor be on its last legs?
I have a 93 wrx with scooby 15.5psi chip, hks induction and full decat.

Anyone shed any light on this before it ruins another set of plugs.

Thanks all

Tim