Just recently ran into a problem with my 99 civic si (I,H,E). When im idling the car starts to misfire and the car sometimes almost dies. In the past week ive changed the coil, cap, rotor, plugs, and wires. None of these have made any difference for the problem. The misfire doesnt happen while driving at all. Only time its noticable is at idle. Also, there are no codes present. Any ideas what else could cause this problem?

 

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