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Rb20det loud tapping noise after changing the cam gears and timing belt, was running 100% fine before replacing the timing belt and can gears Need help asap!

Well when I got the car I noticed that the wide band 02 sensor is all over the place. Say I take off reach 3rd gear cuisin at like 60 70 miles at dead zero boost or vacume. I can feel the car surging go stop go stop like the power is coming and going. Now on WOT it works fine. First off I should mention that I have a power FC in the car and I have looked over the whole power fc FAQ. But the problems are a bit deeper than that. I'm using a greedy y pipe with two new z32 maf meters, cause I was thinking that it could have been the afm after many hours of reading. Now I also changed the fuel pump and went with an in tank Tomie pump, with fuel rail and regulator. Alone with spitfire coils and HKS plugs heat range 7 I'm planning on running only 1.2 bars not alot at all for those AFM's. Ok lets say the car is started witch it does fine after revving it. The idle would drop to the point where it wants to cut off, and it would just go rich before it starts to lean it self out. I mean rich below the 10 mark and if I walk to the back of the car, all I can see is just smoke rich smoke. Some times it cuts off or it will level it self out until I rev it again, don't get m wrong it free revs fine just hard to drive like this and the rich smoke will kill me. I should mention that I set the fuel pressure to 2.5 bars with the hose on and 3 bars with it off. Another major thing I'm thinking of here is. Well there are no filters on the afm's I got them but they just havant arrive as yet. Do you think that no filters in front of the afm,s would cause this problem. I,m also thinking of doing a full reitnialize of the power fc. Is there any thing to help with tuning this in the power fc that I may be over looking. I plan on making a video later on on how the car is running and post it for all to try and help. I'm stumped and just spent g,s on this set up just to fine it won't run even after a simple turbo mod. I'm thinking it's something to do with the y pipe and afm's I even used back the stock ones and the same thing. I notice that one afm v is less than the other by just a little.