1991 B2600I wont start
 

I stupidly pressure washed my engine. It ran rough afterwards but was running for around 10 minutes. Then I tried to back it out of the driveway and it died and wont start.I dried out the distributor, The fuel pump relay doesn't turn on the fuel pump unless I manually close the relay. The injectors are making a humming sound, the spark plugs are bone dry. Any help would be appreciated

Upon further inspection it seems to be the throttle body that is humming

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