So I have been trying to get my car smoged for sometime now but the dang check engine light keeps coming on. For the being too high.. SO I went ahead and I put my exhaust system back to stock. The only mod I really have is a cold air intake. I reset the check engine light all the monitors succeed but then when the catalyst system finally clears bamb check engine light. My Car is idling around 800-950 warm. I did change one of the PCV hoses to a longer one. So it is not the factory Pipe

Pipe 11823+B is the pipe I am talking about in the photo

 

Anyone?

 

https://my350z.com/forum/maintenance...y-problem.html

Try this thread, Id check the hoses are tight and clear the ecu memory by discounting the Battery overnight. Do the throttle relearn steps and see what happens.