It is a 2.5 and I installed motorcraft double platinums gapped to .56. I also used fms wires. The CEL is not flashing anymore it is solid, and the car is running great. Before I changed the plugs I had a solid cel with a 300 code and the car ran like crap. All the plugs are in fine and wires are correctly connected, I checked 3 times. I'm going to go to Autozone to get the code pulled again. Also I live in AZ, and it has been 110 the last couple days, so they may account for a little extra heat. I'll repost when I get the code.