my 2004 runs very acceptable , but it make a weird noise from exhaust or turbo area only at low temperature. It make something like chuf chuf , like steam locomotive ,when i release the accelerator pedal . otherwise it runs nice .
thanks for help

 

That's called "turbo fart" and it is normal. I'm not sure why it is more audible when the engine is cold, but it is and that's the only time I ever hear it.

It is just excess boost blowing back, because it has nowhere else to go.

 

thanks !!!!