Matt, The fuel pump and frequency valve should cycle on for 1 second when turning the key from the "accessory" to the "run" position. The timer chip in the RPM relay causes this when it receives power during the intial key-turn. The RPM relay must receive additional pulses from the coil (engine turning over) to keep the contacts closed. Long story short: The freq valve should not be continuously buzzing if the key is in "run" but the engine is off. (The idle regulator will though) Either the wiring was modified by a PO or perhaps your RPM relay is sticking. I wonder if your fuel pump is running too? #3 injector: If ONLY the #3 injector keeps spraying after releasing the air-flow plate, you may have a gummed up injector. If all injectors keep spraying, the metering piston in the fuel distributor may be gummed up and doesn't move freely. Fuel pressure: When the fuel system is pressurized, yes you should feel resistance when pressing on the air-flow plate. When the system is vented, the air-flow plate should be very free..almost bouncing when it pops back up. That's what the Control Pressure Regulator is partly for; it pushes down from the top of the metering plunger in the fuel distributor. Don't think I'm nagging, but you've got to read the workshop manual. I studied the fuel section for 6 months until I totally understood the flow-diagrams and could draw the entire system (color-coded)from memory and I still certainly wouldn't call myself an expert. Hope this help. Happy Holidays, Rich A. #5335 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/