p0303

Year/Make/Model: 2009 mazda mazdaspeed3 Mileage: 123800 Location: Norco, CA Concern: Car is running fine but throwing a CEL for a cylinder 3 misfire DTC's: P0303 Modifications: none ECU/Tuning Software: none Tuner: none Is the concern intermittent? No Can you duplicate the concern? Yes (CEL is...

Hello all! I've had my speed3 for some time now but I'm new to this forum specifically because I could use some outside advice. My car has developed a cylinder 3 misfire (p0303) while under boost around 3.5k-4k. The car runs perfectly fine under normal driving circumstances and the idle is...