I have an '82 300SD that will not stop even after pushing the stop lever under the hood. I'm sorry if this has been posted before. I read the postings on here about the vacuum shut-off valve. My other 300SD has this problem, but pushing the stop lever stops it, so I don't think my '82 has a vacuum problem. Could the shut-off valve become so shot that after manually closing it, it still leaks? Could there be another part of the fuel system that could be the problem?
Thanks,
Joshua