1. My 300D will not shut off. I must manually shut the fuel off under the hood. When the key is shut off, it only partially pulls ther shut off lever down. I'm assuming the soleniod does not have enough power to fully shut off the fuel supply. How hard is it to change the soleniod? It looks like the intake manifold must be removed.

2. My glow plug light will not turn out. Does this mean one or more glow plugs are bad?