Ok my truck keeps missfireing. I ger P351, P355, 358 ODB codes. At different times. The coils have been replaced on thes Coil 1, 5, 7, and 8 severl times in the last couple months. It keeps missfireing on these coils. The P351 codes say Primary and Secendary Ignition Fault. I'm told this can mean bad coils, PCM, Or Bad ground. I notice when It begins to missfire the Fuel Injectors for these Cylender are not working. Could this be why i'm getting a Missfire. Also It only happens when I'm Running Ac and moving at idle speeds. and it does it randomly. I can park car for 30 mins and get in ad drive and have no problems for day or two. Could my Injectors be going out? or is there another problem.