I HAVE JUST GOTTEN STARTED USING MODIS HEAVY DUTY SOFTWARE, AS I HAVE SPENT MOST OF MY CAREER WORKING ON PASSENGER GAS AND LD DEISEL DRIVEABILITY,THIS IS A NEW VENTURE. I HAVE BEEN WORKING ON A 1999 MACK E7-460 WITH A COMPLAINT OF LOW POWER AND NO CODES. WHEN ... Login to read more.