I have 1981 Caddy with 1.6l diesel. I have got it to start, I though it was the fuel pump, changed it and same old thing. I can spray starting fluid and it will run until that is gone. I took it to a Volkswagen mechanic and he said that the engine did not have enough compression to pull fuel to the injector pump and run. He said it showed 290 on 3 and 350 on the other one. Is this right???? If so what should I do first?