What are the most common misfire causes on the 302 cars? I have a 94 GT and its got a bit of a stumble at idle. I talked to my long term mechanic friend, and he said that 99% of the time, its the same problems coming in on the same cars. He said they'll get some odd stuff in every once in awhile, but once you've fixed a few, you begin to notice a pattern. He said nowadays, he can pretty much go right to the problem a given vehicle is having, just because he's fixed that same problem on so many others already. And that its a recurring theme with most vehicles. Given his response, I wanted to ask this question. So what is the common misfire that most of these 94-95 5.0's get? My other one also had it. My buddies cars have had it, before they sold them. I'd be willing to bet its something that most, if not all of them suffer from until its corrected. Anyone have any idea? I've given it a full tune up, dizzy cap, rotor, plugs, wires, O2 sensors, air filter, fuel filter. It has maybe 5k miles on that tuneup. So what else? What are some areas I could check?