can a bad pcv valve make the car run rough
3 Answers
That's the weird thing no engine check light has come on you would think their would be
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Check engine lights and the OBD system are geared towards emissions related problems, and not for all engine/trans problems. There are a host of mechanical problems that will never show up as a DTC. I'd get it to a mechanic and see what is ticking. As to your question, yes a bad PCV or elbow can cause rough running/idle.
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