Ok guys. After a few weeks and finally in front of my car here is the deal.. For some reason I found a hole in the plastic air intake over the engine. Is close to the connection with the air flow sensor. Looks like it was caused by some kind of backfire. I cover the hole because I have a leak of air obvious.. After i fixed that now I have anothe issue. When i press the gas the tach did't went over 2000 RPM's At idle is fine but when you punch the gas, stop at those rpms. Really I don't know how to explain but I don't have any kind of power in my engine...

Please any hint where to begin....

are you talking about the valve cover or the airbox?

I'm talking about the airbox over the engine, not where is the air filter. Is the plastic black part over the engine in between the fuel injectors..

Its plastic 6 humps on it? Black? If so its your UIM Upper Intake Manifold.

From the engine photo (thanks to davmac) is on the left side if the IAC in that black part where the fuel lines run over to the front fuel injectors..

You are right ChrisGT....

The loss of power happened to me when my Cat had decided to commit suicide lol. There are a few possibilities. Blockage of air going into the engine. Blockage of air leaving the engine etc. Did you hear / feel it backfire?

No I didn't hear the backfire, I just smeel the burn plastic coming from my A/C

You need to post a pic. If it's what I'm picturing, you shouldn't be driving the car.

x2

It sounds like your UIM has a hole in it? If so that would cause all of your issues. Post a pic of it so we can see.

Hey Guys.. Thanks again for youe help.. Was great .but to be short after a whole day over it I finally cover the hole with some fiberglass at auto body shop and then check again and turns that when the guy that replace the cat he put it backward. I didn't know that they have flow direction but the magnaflow that they installed on my car it has it. So we fixed the cat ans the spirit on my car came back. It's alive again and I can say with a lot of power that I didn't feel it before... Thanks guys...

I knew it was Cat related I so called it hahaha Glad to see it back and running.

Had the same issue in my 02 gpgt.

Glad to hear you got it fixed...they work much better when they're installed correctly...