Thanks for the input...well, its happening again tonight...the idle went up and down...again..I pushed the pedal anyway.. I could hear form the exhaust, the sound of the car went very deep and repeating ...(sorry guys I don't how to say it ....)...then I stop the car wait for a while and back to normal again...Now I;m thinking maybe the air filter is dirty.....I have the air cold intake....guys, do you know when do we have to clean the air filter or may ber replace it.....and how?

Thanks...

Reds