PCV valves helped idle - ZR-1 Net Registry Forums

Aurora40 · 10-26-2005

I replaced the two PCV valves today. For some reason someone before me zip-tied the PCV valve assembly together. Maybe the hose was blowing off. Both valves seemed original, as they had "AC Spark Plug" stamped on them, not AC Delco.

I started the car up afterwards (I changed the fuel filter about two days ago too) and it idles very very smooth now. Just a hint of vibration to it, you can see it in the plug wires shaking barely, or if you put your hand on it, but it's much better. Plus, this was a cold idle with the AIR pump chuffing air into the exhaust.

The old PCV valves rattled, but a sort of gummy mushy rattle. If yours are old, you might consider changing them.

10-26-2005	#1
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,704	PCV valves helped idle I replaced the two PCV valves today. For some reason someone before me zip-tied the PCV valve assembly together. Maybe the hose was blowing off. Both valves seemed original, as they had "AC Spark Plug" stamped on them, not AC Delco. I started the car up afterwards (I changed the fuel filter about two days ago too) and it idles very very smooth now. Just a hint of vibration to it, you can see it in the plug wires shaking barely, or if you put your hand on it, but it's much better. Plus, this was a cold idle with the AIR pump chuffing air into the exhaust. The old PCV valves rattled, but a sort of gummy mushy rattle. If yours are old, you might consider changing them.