When my engine is cold, when I first press the gas petal, there is a hesitation before the car speeds up. It actually goes initially, then hesitates, before taking off. I've noticed when the car is warm, it doesn't do it so often. I just replaced spark plugs and ignition coils. The car has 70,000 miles. Could this be a pcv?? I can take the oil cap off no problem while the car is running, no idle change. If I remove the cars oil dips tick, then the cars idle bounces around and I hear a whistling sound from the dips tick tube. Maybe this is a cam position sensor??? Any thoughts?

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