Hello I'm a new member to this group , I recently blanked my egr with the blank from here and a cheater, I did this as the egr was playing up, all was ok for a week and then today the car started playing up like it was misfire and no power, so I limped home and checked over the blank and cheater and still the same , I have read it maybe the coil pack, what are the symptoms to the coil failing? I need all the help I can get
Thanks