Some "minor" issues with the Z

[KeVoH]

Performance Mods :

Stillen CAI and Berks CBE.

Issues:

• "Pinging" at low RPM's. (No ECU code has come off)
• Whenever I stop, let's say.. at a red light, sometimes the RPMs drops to 500 and the Z shakes as if it was going to stall then it goes up to normal 700-800.

Any ideas on this? I searched around the forum and couldn't find the issue with a fix.

I tried different Gas Stations (Shell 91 is the highest octane gas around).

Is there any possibility that the CAI tubes vibrating could sound like pinging?

Thanks!