Yes I did days of search and I am still trying to pinpoint the problem. Here it is. I have a Powerlab kit tuned with a UTEC. I have been driving the car for a couple of years now with some track time and no issues till now. The motor feel like its knocking and its running lean. When I pulled the plugs they were white as new. My AFR's run wild from 14.0 to 17+ on my AEM wideband during normal driving. I dont feel the noise and runs much better in the early mornings, but after it reaches temperature it begins to run like crap and sounds as if the motor is going to give out. I do have a code for the O2's rear and cam positioning sensor that I had replaced not to long ago and multiple misfire. I heard of the fuel dampers having some issues causing this type of issues so Im going to replace those soon. My fuel pump is a walbro and still has the same wine it always had. any input is greatly appreciated.

 

well looks like the fuel dampers were the issue. I replaced them and the car just makes power as it was before. Just need to verify with the plugs. The A/F is back in the 11-12's under boost...

 

with all you described that in no way would relate to fuel dampers. Fuel dampers will not change the tune. it only removes resonances in the fuel system.

They will not cause misfires or the other codes you are getting as well. Many people run without fuel dampers and it doesn't do anything with the tune (make it run lean or whatever). The fuel dampers smooth out fuel pressure spikes under vacuum. It won't affect your WOT like you said it cleared up. You have something else going on that you must have fixed when you replaced the fuel dampers (like a missed connector or loose wiring).