after my dumb $hit buddies decided to find some old gas the guy across the street was getting rid of and put half a tank of it in my 96 grand laredo 4.0L
and after putting a rubber hose and takeing out the bleeder valve in the fuel rail and by passing the fuel pump relay and haveing drained all the old ****y fuel it has not ran right since and no matter how much fresh gas i shove in it don't run right btw i have major smoke blow by comming from the valve cover and dip stick tube

 

start by changing the spark plugs, they must be fouled.