[shorod]

I wouldn't expect the belt to be making the noise if the engine is stopped, which I think is what Londat was claiming when he mentioned, "Turned car off...." Maybe the cooling fan was still running and causing the squeaking, or maybe you caught a mouse. I suppose it could be the Idle Air Control servo, but if the key is off, which it sounds like it was, that shouldn't be moving either.

Was it a pretty rhythmic squeaking?

Unfortunately, a squeaky cooling fan wouldn't help you out with the other issues you are experiencing.

-Rod