Ok here's the scenario: Everything was fine with the car (90 240) running strong no problems. Got the oils changed and was told my belts were a bit worn. I figured better get them done sooner that later. After belts were changed start to hear squeaking/whining sound normally when the heat was on. I figured it was the blower motor.
Now (within last 3 days), has occasion when car wont start. All lights come on (check engine, brake failure, etc). The first time it happened I cranked it again and was off. Yesterday, it took a bit of effort to get it on. Seemed to want to cut off when shifting. I upped the idle a little and seemed fine. This morning started fine, seemed as if trying to cut off but kept going. I tried to head to work but as much as I gassed the car it was going it's own speed.

Need some advice on what it could be.