MX-3.com

I have power windows and just recently I noticed that when I press the button to get the windows up and I am not driving (just parked in neutral and car is running) the engine begins to make a low growl like sound that it usually makes when on the verge of stalling. I even tried testing this out with the windows closed and pressing the up button but it still made the same sound. I am a little worried.


Please tell me what this is!

Your alternator or IAC (Idle air control) could be bad. Do you get a check engine or low battery light when it happens?

I do not get an engine check light, And I recently got my alternator replaced with a new regular duty one, and all my air sensors and such have been checked and fixed this summer due to a previous different problem.
I am getting worried that this could be a problem as I am getting subs put in this weekend and I am afraid the battery will die very quick.

It's not an air sensor or anything, it's a little valve in the TB that controls the idle speed.

Oh, okay thanks, and how much would this approximately cost to fix?

And also, its funny that you mention idle speed because since the first day i bought the mx3 the rpm's in idle when starting the car would be from 1500-2000 then would go down to 1000 after a couple of mins. I dont know if this is relevant or not.

That's normal, it idles high when it's cold. But I don't know how much one costs.