So I have a 2001 Bravada with a couple issues.

So I have a 2001 bravada with a couple issues when I go to turn it on the first time I'm driving it everything's ok but when I stop at red lights after a couple of mins. It starts to shake and when I do accelerate I get a blinking check engine light. Also if I stop at couple of places it's alot harder to start it I have to hold the accelerater down for it to start once I start going the gauges go crazy back and forth the car accelerates itself and when I do go it starts to jerk like when you run out of gas but my gas is full pretty complicated hopefully somebody can steer me in the right direction to fixing that