Idle fluctuations at full stop (600RPM-800RPM) with audible click

[MusserST3]

New to LC as a whole, is this much to worry about? Happens about every 5 seconds or so

Not too sure if this is the right spot to post, sorry if not!

 

[CJF]

Is your A/C on?

 

[suprarx7nut]

Ac clutch will cycle on and off and result in that neighborhood of fluctuation. As will the charcoal canister purge vsv.

Every 5 second sounds unusually often, but in general that fluctuation isn't a problem.

 

[CJF]

Ac clutch will cycle on and off and result in that neighborhood of fluctuation.

I disagree.

If it is the A/C causing it and it really is happening every 5 seconds, that's way too often and indicative of an overcharged system.

 

[suprarx7nut]

I disagree.

If it is the A/C causing it and it really is happening every 5 seconds, that's way too often and indicative of an overcharged system.

Agreed. My post was intended to convey 600-800 rpm is normal fluctuation as ac or charcoal cycle on and off. However, every 5 seconds is atypical.

The rpm change is normal. The frequency is not.

 

[nissanh]

Could be a faulty throttle position sensor. Happened to my 92 corolla RPM fluctuates when idle, once I replaced it with an OEM TPS, everything went back to normal.