P0507 NISSAN - after following all above procedures idle still fluctuates

Question

Throttle body has been replaced, new PVC valve has been installed, relearn procedures have been done by computer and relearn techniques. Idle is still surging. Engine has been sprayed with brake cleaner and no leaks have been detected. Any thoughts as to what else to try?

Answer 1

If the RPM is too high sometimes it wont reset, but you can lower it by tricking the ECU that the rpm is not so high. You will need to disconnect or remove one of the coils and do the idle air relearn (with computer its easier) and if any misfire codes come up erase the codes, connect the coil and do the idle reset do the idle air relearn again.