I have a 2002 Mazda Tribute V6 with 151K. My check engine light has come off and on for quite a while now, mostly it would come on when it rained and then go off when the weather cleared. When it was on, the engine would sputter or misfire. I first had Auto Zone hook it up and they said it needed its plugs and wires changed. No problem. I took it in to a repair place and was informed that I don't have plugs and wires, but something with coils and that since it was impossible to determine which coil was bad, all would have to be replaced at a cost of $1500. I then took it to another repair place and they said the same thing. Now I have seen some discussions regarding this same thing and apparently some people have been able to identify a specific coil. At this point my check engine light is now on all the time and I'm really worried about doing terrible damage but I honestly can't afford $1500! I would appreciate any suggestions!