How you guys know, if you lost one of your ignition coils. I'm running a Greddy blue on my Z and lately I notice that my car is lacking in performance.
What kind of symptoms are typical, whe you have this problem. Any help is greatly appreciated.

 

Bump

 

Do you have a slight missfire at idle? If you are running on five cylinders it can be hard to tell with the torqey VQ35.

If you are down a coil it is common to have a check engine light.

You could also pull the plugs (see if one looks wet - this would be unburnt fuel) and/or shut down individual cylinders with the Cipher software (if you have this) and listen for the change in rpm when you turn off different cylinders.

Hope this helps,

 

I'm not experiencing any mis-fire at low speed. About the check engine light, if the change on the car is going to be detected by the oxygen sensor, then I don't think my car is going to be able to detect changes since I'm running TP with Non-foulers.

 

Okay I see what you mean. The change I was writing of is a change in the rpm's of the vehicle and the sound of the engine. This would be when you deactivate a cylinder with the Cipher software to diagnose your problem.

That process is independant of the oxygen sensors.