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Disconnect both the electrical connectors to the distributer. Replace the fuse and see how it goes. You will find that the condenser/capacitor in the distributer is shorted to ground. You need to replace it or clip the wire from the coil. The condesor can be purchased from the dealer for about $10.
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Click the link below for the power flow circuit. On page 2 is the circuits that are feed by the AM2 30 amp fuse. The next most common problem would be the injectors or the wiring. Did someone pinch the wires to the injectors under the valve cover? Start disconnecting the items in the list of supplied items to isolate the short.