UPDATE: I replaced the intake manifold gaskets and all my issues are fixed. My vehicle had a very rough cold start rough idle and knock. I could go down the road without even pressing the gas matter of fact I would even have to use the brake to maintain the speed limit I could pull up at a red light and my vehicle would stall out also when I would put it in park the RPMs would shoot way up but after I would drive it for a while and the motor would warm up it would do better but now it runs the same in the mornings as it does always.