Really? That sucks so I will always have that sound?

 

The long tubes and h-pipe I have on both have the O2 sensor slots and I have O2 extensions so my front and sensors are plugged in but I guessing that's why it is messing up like ZombieHuntr stated.

 

Are you not able to locate the 4 digit ECU sticker? The ECU number is needed in order to lock the tuner to your car.
You can can and ask American Muscle. I am sure they will be able to assist!

 

I found it, it wasnt on top of the ECU it was on the side but the bad thing is the first 2 digits i can hardly tell what they are but the last 2 were clear.

 

I'm surprised as chit that the OP isn't throwing a code with the LT's and no tune.

Definitely get that TB spacer off. Those things ALWAYS seem to f*** things up.

 

Man, that sucks! I am wondering if the ECU code is listed somewhere on the white sticker on the passenger side door jam. It's worth a look!

 

Is the TB spacer really that bad for the engine? and yeah ive had a check engine light from the beginning with the LT's

 

I actually checked the passanger side kick panel just to be sure and it wasnt there. but i read online if i remove the ECU it should be imprinted on it some where, but i dont trust myself taking it off.

 

I am not sure how difficult it would be to remove the ECU cover, I never had to do it.
Wish i could help ya out more..... :-/
Are you planning on purchasing the tuner from American Muscle?
If so, give them a shout and ask for their suggestions. Their customer service is outstanding.
Good luck!

 

Let's just say that the TB spacer doesn't help and it's been a known cause of quite a few issues. But even the aftermarket TB's have been problematic, too; as much if not more than the TB spacer. IMO, I'd put the stock TB back on before loading any tunes just to be sure you have the best baseline to start from.