Hello,
I bought a 2007 G35x premium automatic sedan with 155kkm last Sept. I cleaned the throttle bodies and suffered the idle hunting for a month but finally resolved it with troubleshooting and access to the FSM (NICO website). I tried the relearn procedure and eventually went to the dealer but they coudn't effect a relearn and quoted $2k for new TBs. I declined and convinced them to update the ECU but it still woudn't relearn. The FSM details acceptable voltages for open and closed throttle positions and I was able to backprobe the TB harnesses to confirm. I then adjusted the external setscrews so that the throttle plates were closed buy not binding. I removed each TB plastic cover and backed off the internal setscrew in an attempt to increase the voltage range ( and avoid any binding). When I started the car the idle settled down immediately, without any pedal dance! It was such a relief! Took many hours of research and troubleshooting but from other stories on this forum, I was convinced a simple TB cleaning did not destroy them.

Steve.

 

Hi Steve and welcome to the forum! You've came to the right place - this site is a great place with tons of useful information and knowledgeable guys. You will find everything needed here!