I have an 89 dodge ram van with 318. For the past year I've been having problems it won't go any faster than 25 miles per hour if I try to give it more gas it'll gasp and die. I don't even attempt to go uphill any more. Clearly the engine is starving for fuel the question is why?!? I've dropped the gas tank twice and completely cleaned it, it's plastic so there's definitely no rust. I removed the electric fuel pump that was in the tank and added an inline one instead so I wouldn't have to drop the tank every time there was a problem. I've blown out the lines several times and I put a fuel filter before and after the fuel pump in line. It runs for couple of days but then the problems start all over again. I've even tried bypassing the gas tank completely by using a new 5 gallon gas can but that didn't help either. I have also disconnected the fuel line after the fuel pump and just ran the pump. Well, there is plenty of gas coming out the line. So now I'm out of ideas. What is next? Need some help. Thanks a million .