3sgte idle rough somtimes performance keeps changing Options

[mk7celica]

I have a 2nd gen in my celica and I have a few questions. 1st let me tell you the symptoms. Car seems like it has great performance like throw you in the seat kind When I got it and changed to a fmic and it seems slower. Then I found boost leaks so I fixed them, car Ran strong. Then Had a elbow on my piping blow so I replaced it and added a ko racing tb inlet pipe. Car did not seem as fast as stock intercooler, but ran a 14.3 at track. But since I have added and changed the intercooler pipes a few times finally got a exhaust shop to bend me 2 solid pipes but there not mandrel and the cars dont seem as fast as it did. Well things I noticed that are different since I first got the car from swap: the turbo seems louder alot more lately. I dont have a bov on the car and it sounds like I do when I let of gas or shift. The fuel pump is walbro and its gotten loud as hell was not like that before. Boost reads on gauge 12/13lbs like it should and it holds it. So I decide to change my spark plugs and they was out of the copper ngk plugs so I got irodium costed 2 times as much installed them and power is not there. The power seemd to fade as the rpm raises. Clutch is strong. Idles weird somtimes. One more thing the plug wires that is on the car that came from southern car customs with the swap completion dont look like everyone elses, They stick up 2inches above the valve cover they are not flush with the valve cover any one seen these plugs I think its the wrong kind.