tapping noise at idle

Originally Posted by Dreadnaught

When I first got my Z I heard a tapping coming from the rear of the right side head. I thought I had a valve train issue. It turned out to be purge control valve. That's what you may be hearing. I could hear it if I was standing on the left side of my engine bay but it was a little more quiet. You can put your finger on it and feel it pulsating for every tap.



I think if it was an oil pressure issue you would possibly have advance and retard issue for the intake cam since they are driven by oil pressure.



Hope this helps, I can only do so much over the interwebs.