I guess it's a miss I'm having, it sounds like small amounts of muffled air popping. Everytime it happens my rpm needle jumps up 300rpm but the engine doesn't rev any higher. You can tell when it revs higher from the higher tone but this is just a needle jump with the pop. What gives?
The plugs are Autolites. Those I'll change. 
now who owns the the 3cy geo! 
