Sooooooo this week's 240 problem is...

The last week or two my car has been hesitating when going through gears, especially going from first to second. It makes a puttering sound when I accelerate and now it tries to stall when I first start the car. Also sometimes it gives off a burning smell....not sure what of though

Now Ive had alot of ppl say it could be timing and fuel issues but I'm just not sure. I am not a mechanic so I can't be 100% accurate with this. Does anyone have an idea what this could be or can someone take a look at it?

Thanks.