My car sat most of the week, until saturday. When I got in, and start it up some strange things happend.....

on my first turn of the key, it turned over about 5 times and didn't start. I turned the car off, then on again, tryin to hear the fuel pump. Nothing. turned it over, and it started up like normal. BUT then I hear this fluid wooooshing sound. I was unable to pinpoint it, but it was pretty loud.
I turned it off, and started it up again. The sound didn't happen.


After the car sat again for a few hours, I tried again. It happened just like above. I couldn't make it happen on sunday or this morning.


any ideas?

 

TTT please help.

I've check the coolant levels... any other ideas?