like when i wants it to go fast like a normal car would do when you step on the gas peddle heavier and heavier. Mine doesn't do that anymore but it will make a real loud sound in the engine like it can't handle it or something. I talked to some guy today about it and he told me that i need to install the boost gauge and read it to see if there's a too much boost in the turbo and he thinks i might have a vacuum leak or something. My brother in law told me that he thinks I need to buy an Apexi to upgrade the problem computer to tell the Fuel INjectors to get more fuel in. Still don't know what's going on.