If you have a 94, it does not have the VP44, computer controlled injector pump, but a manual. Depending on the actual rear of the engine, you could have a lift pump, or a manual pump run of the engine. There are several things you could do to get it running, but if you are not diesel savvy, you should get the engine size, year and chassis information, a go to a truck service center and ask to talk to a tech about your problem. They may give you enough information to get it running. That is how we learn. Best of luck.