Just installed the Terminator X and have been driving it for about a week getting the tune dialed in. Was out in the car today and it was running fine. I shut the car off and when I fired it back up, it now has a misfire. Coils for cylinders #4, #7, #8 aren't firing. I checked my coil grounds and both of them are tight. I didn't change anything in the tune and not sure where or what I should check next. Thanks for any help.