i have an 03 wrx, i have done the following recently;
evo III 16g turbo,
aem short ram,
hks catless uppipe,
hks catless downpipe,
hks ssqv bov,
fuel pressure regualtor,
greddy boost controller.
now my check engine light is on for catalic converter which is fine, but also on for running lean?
im getting a tune real soon but im wondering if a tune will fix that or if i need injectors and a walbro?
and what else might i need?
sorry for making posting soo long im new to clubwrx, give me a brake(: haha.