vacumme. vacumme, always leads back to vacumme, least wise for me. I have been running it up and down the street, trying to adjust the boost control. I have been blowing different vacumme lines and piping. I am on the other page ordering stuff from Silicone Intakes to re-do all the lines. Man if that aint it, it don't cost much for a new timing belt and tensioner, just a saturday project.good luck bro!!