I have looked through the questions to find an answer to my question and none of the questions seem to similar enough to this.
I have recently purchased a 2002 Subaru Impreza Rs and the car is doing something strange; while driving it will randomly, but consistently, "lose power" for a split second while driving. This can be in any gear, at a constant speed or while accelerating. I first started to notice this when I was driving with the music off. Every once in a while I would hear this faint "air release" noise and power would seem to "lag" for the smallest amount of time.
The only time this occurs is when the AC is on. This would lead me to believe that it would be an AC component. update below
The compressor seems to be working fine. The ac blows super cold, strong air and the ac works at idle and works on every setting.
I don't know much about the AC system and all its components so I don't really know where to go next. Could it be a leak somewhere that releases air when enough pressure is built up? Could some internal component of the compressor be slipping or seizing up? I asked a shop and they want to charge a few hundred bucks to put die in the system and check for leaks.
Any in site or direction would be much appreciated. Thank you for your time.
So as i have driven this car more I've been noticing a squeaky belt noise when I start the car for the first time after it sitting for a while. (mornings before work and after work to drive home) It usually lasts for about 15 or 20 seconds and is gone. This could be unrelated but i figured I'd through it in just in case.
The other thing I've noticed is that the issue explained above doesn't only happen when the AC is on. I've been driving with a bit more heat now that the weather is getting colder and it still does it when the fan is on. (When the fan is off I'm yet to notice it doing it)
I'm familiar with the load the AC system puts on the engine and it doesn't feel like that at all. The RPM's don't go down or anything when the problem occurs. It's just a little chirping noise.
My best idea still seems to be that the AC compressor has little mini-seizes every now and then. (That would definitely cause a load on the engine) However, if that were true I don't understand why this would happen with the fan on.