Can Vct Solenoid Cause Idle Hunting?

[RB JET]

Hey Guys,

I have a series 1 r33 gtst. Just recently had power fc installed and tuned, car is great to drive just lately been having an issue with idle hunting. Ive cleaned out my aac valve, adjusted tps and idle screw and still hunts.

On the hand contoller when i do a sensor check it shows the vct turning on and off (clicking sound) at idle, when it turns off the revs drop and when it turns on the revs go up. Is this sensor faulty or is there anything i can do to stop it from turning on and off??

Any help is appriciated!!

Thanks

Gavin

[RB30-POWER]

it should be off at idle and turn on when you open the throttle.

make sure the tps voltage is 0.5v at idle, if not adjust the sensor until it is.

also if you think it is the problem, just disconnect the electrical plug that goes to the solenoid and find out if it still hunts.

my guess would be, either incorrect base idle setting via aac valve screw or vacuum leak somewhere, could be a blown off hose, split hose or even a leaky atmo venting blow off valve.