I have a caddy that won't keep running. It will start with a shot of starting fluid but quits running when that is used up. I drove it into the garage and turned it off so it was running then. I drove it into the garage because of an exhaust problem. I lost that little tube coming off of the catalytic converter in the snow and ice from our last snow storm (Minnesota). I have a new catalytic converter installed but have not connected that small tube to the air pump. (I think that is where the line is supposed to go.) Is it possible this missing line is preventing the engine from running? I don't think it would cause a vacuum leak but I am not sure. Any ideas? I used my code reader on it and it didn't show any trouble codes. Gas tank is full. I just filled it a couple weeks ago.