Re: ITB Conversion on 16 valve 4AGE On my stock bigport AW11 a leaking exhaust manifold gasket induced the O2 sensor to browse lean and it pumped fuel into your motor. Fuel financial system plummeted till I sorted it out. I don't want to become contacted by Gumtree South Africa https://toyota-4age-engine-for-sa48158.post-blogs.com/55461902/blacktop-4age-things-to-know-before-you-buy