Hi JC, first time poster in these here VE forums, just got my first VE. VE S1 Omega with high Ks (300+) and it guzzles fuel (13L/100 is the lowest I can get it, 14.5 minimum normal) and logs o2 codes. First up did the timing chain because it doesn't have a service history, so at least we can rule that out lol I've heard some conflicting things, so here are my questions to try and be sure it's o2 sensors before I drop a couple hundred $: There's what sounds like LOUD injector tick at idle. Coils not visibly arcing - how to test? Worth checking & cleaning MAF thoroughly? Have heard to check air temp sensor - where? Going to try smoke test for vac leaks. Anything specific to VE V6s I should check? Can codes/eng light be reset without a proper scan tool? If there's anything you know related to this or can contribute pls hit up that reply button BONUS: Interested in what a V8 swap on the cheap, all work done by me would end up running me.