My 1982 300 SD w 126, will crank, but not start. The fuel system draws a vacuum that is sufficient to hold the fuel cap in place. I've released the vacuum and pumped more fuel via the small (leaky) hand pump near the IP. My car stranded my wife and I last night (in formal wear) at a fundraiser. I am unsure of my next steps? Any help / idea? Hunter what do you think? I've checked the bell shaped device on the third fuel line, and while I cannot confirm if the bivalve is working, I noticed that the line itself has a small tear at the final90 degree beng.