Im new so I dont exactly know if im putting this in the right spot. But I have a 91 f250 with a 351w in it. I was leaking coolant everytime I drove. So I used bars leak and followed the instructions as it said. It ran for a little bit. Later that night after making many trips. It started sputtering and blowing a little black smoke. It did that on and off traveling between lakes. Then I parked it for about thirty minutes. Anf now the fuel pump wont stop priming an dc it wont start. I disconnected the battery to charge it.and found that disconnecting the battery temporarily made the fuel pump work right. But it still hasnt started up since that night. I need help.