hey ddgonzal,
So it sounds like this valve is normally closed (when up-powered). From the diagram it looks like a simple piston that stops a gas line I suppose. If I'm not able to get power to it, would it be a problem if I just took the solenoid out, cut off the piston with a hack-saw and put it back in? Is post-engine-shut-off dieseling really a problem?

That would be a last resort. I'm trying to figure out from the wiring diagram what voltage the solenoid needs (ie regulated or unregulated battery voltage). Here's a pic of the diagram below (or go here for a higher res version 248kb large diagram I've looked over it quite a bit and the only solenoids I see are on this page and are called the "Throttle Opener Solenoid", "Fuel Cut Solenoid" and the "Vacuum Cut Solenoid". I'm guessing it's one of the first two. Any idea which it would be? The wires colors I guess are L and YR - not sure what this means but the wire on my car was either red or green, I can't remember. Thanks,
Michael