Does your ISC ever make a noise? I was told this is a fairly common thing, and not to be worried about it, and that the PFC does not control it perfectly.

Mine specs out OK, but it sometimes makes a noise like it is cycling back and forth to me when the car is not running and the ignition is on.

I want to try and keep it, just looking to see if what I was told is true, and if so how many people it affects.

 

Mine never made noise,

 

mine didnt make noise either.

 

I have had an ISC buzz before with the ignition on. Cleaning the inside with a solvent (MMO, carb cleaner, etc) can remove deposits and restore it in most cases. I think the PFC controls the ISC fine if the ISC duty cycle is not too high or low at idle. The air/throttle adjustments may need to be changed on modded cars to put the ISC duty cycle back to the middle.

 

I had that problem when I first installed the pfc but after i did the learing process, I haven't heard it again

 

mine did when i blew my motor