It runs fine till it warms up maybe 5 minutes, when it get warm it sometimes shuts down, Then I can only get 25-30 mph. When you press the gas it is sluggish like it is choking out, or starved for gas. You can let of the gas and then press it again, and keep doing it to move. I had the timming chain repaced because I was told it was jumping time, but it is still doing the same thing. I had the fuel pressure tested it is at 40 lbs. I was also told it was in the exhaust, It doesn't have a cadilac converter to plug up , so what else could it be. Also the check engine light stays on. I also put new plugs, wires, distributor cap ,rotor button, water pump, coil, the thing that takes a plug on the distributor, Altinator, and GOD knows what else. PLEASE HELP !