Fuel Issue

[5150coupe]

replaced two of the fuel filters, the one in the tank, and outside. replaced the fuel filter itself. replaced the fuel lines running from the tank to the outside fuel filter. timing is right on 14 degrees, have a perminent mark to show the correct position. tried using a new mass air meter. still no luck. not sure about the tps voltage yet. i think if the tps sensor was an issue i would have a problem all the time at certain rpms? will check though when i can get a tester. spark plugs are new and starting, idling, and 99% of the time everything seems fine. i think the issue would occur all of the time if the spark plugs were and issue, but i will check for moisture when i get a chance. question, i though at first the issue was heat related, but in the morning the engine is still cold when i have problems. it almost seems more like the amount of time from starting the car to getting a few minutes down the road, so the question is how could time be related. just don't know at this point.: