I have an 86 F250 with a 302 windsor manual transmission. I'm having the issue where the truck will start up fine after sitting overnight and after about 15 minutes of driving it starts to sputter with throttle but it will idle fine if coast/ stop. The truck has to sit for at least 15-20 minutes before you can drive again. The inline fuel pump works (pulled out and hooked to straight power). The oil cap doesn't have a vacuum line on it because the oem intake was replaced with MDX-1 air filters. The air diverter valve is also not hooked up to anything. If anyone has the slightest clue to help me out it would be greatly appreciated.