I have a 1986 Diesel NPR truck that runs great, but a mouse got in and chewed up the vacuum lines. I replaced them, but now when I start the truck, it will not shut off unless I pop the cab and manually pull the fuel kill lever. It also will not shift into overdrive any more. And it stays in fast idle, unless I turn the key to "off." When I do that, it continues to run, but with no fast idle. Before the mouse got in, the truck ran beautifully with no problems.
Any Ideas what is wrong?