Zack--

Well, shucks! But,maybe all is not lost. Lost of engine clatter would usually indicate insufficient timing advance. This, in turn, can be caused by a plugged up fuel filter. This is explained as follows: The lift pump inside the injection pump discharges in a pressure range of about 15 psi to 100 psi, depending on engine speed. This range of pressure is used to position an advance piston against a spring force. If the inlet to the lift pump is restricted it cannot generate enough pressure to advance. This will diminish clatter and cause black smoke at higher throttle settings. Probably will also notice a loss of power.

Only problem with my theory here is that I cannot figure how the idle speed would increase. Is your throttle shaft coming back to the idle stop? If so, then I think that maybe something is gummed up in your pump, not allowing the control sleeve to spill fuel as soon as it should.

If gumming is a problem, it might also have jammed up the timing piston, causing all of your problems above. And you could, then, ignore my entire first paragragh.

It is possible to remove the top of the pump with it in the vehicle so as to inspect the interior for gum or sludge or rust. Or, better yet remove the pump and open it up or take it to your nearest friendly fuel injection shop.

Or, if you find that it is terminal or too expensive, you can try finding another pump.

Hang in there--

Paul