very hard to determine your fault with very little to go on but try giving it a service if it hasn`t been done for a while,check for split air intake/intercooler hoses and see if you can get it onto a code reader to see if there are any faults stored
cdc
February 2012
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.