ok so i get in my car start it up runs normal go drive down the road and then starts sounding like it has an 800 lift cam in it and feels like its running on 4 cylinders. however still will hold an 800 rpm idle just chugin and have to throttle it a bit due to its poring fuel out. at idle its only pullin between 5-15 lbs(not sure what the correct measurement is) of Vacuum. and normally according to my piller gauge if the car drops bellow 15 at idle on the vac gauge it cuts off. i pulled the cap and rotor of any they were F***ed replaced. no change. pulled the plugs they were better the expected. wires arent burnt up i check for vacuum leaks didnt come across any. and in my experience hasnt made the car sputter just made it shut off. going to change the plugs anyway.. but is it possible maybe the coil or ignition module went bad?? car is modded dose have tune 6-speed and is speed density. car also maintains 50 psi of fuel pressure.

any help on what to check next would be great!!!