Hi. I broke down a while ago. Van just died. Managed to get in a slip road. When I started the van , it went straight to max engine speed.turned off. Tried again , same thing.got recovered. Not sure if it a pump issue. As accelerator cable is disconnected. And still does the same. I have another pump,but it is different. It has a black plastic box on it. And wiring is different. Any ideas?