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M y88 ford ran fine then i couldnt get it to start after i put new headers on.then figured out the fuel pump relay wasnt coming on only worked when i pressed the relay down with my hand.and starts fine replaced relay. still does the same thing.please help is dd
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fuel pump relay on ef falcon is located under the header(coolant tank).Fuel pump relay is the green relay,the brown one is the ecu relay.To access these relays,simply undo the 3 bolts holding the header tank in place(no need to undo any coolant hoses),and move header tank out of way,then undo the one screw retaining the relay cover.
is your computer inside the engine compartment? if so i am geussing it got coolant on it also and is keeping the injectors open and running the pump when it should be off.
had a 2000 blazer 4.3 wouldnt start in really cold enviroment..... ended up being the FUEL PUMP RELAY.... it still running good... bout every ther day or so... but it acted like your truck
When U turn the key to the on position (dont start it - but U can't so nvrmnd) and listen to underneath the car about at the drivers door. You should hear a buzzing noise that is the fuel pump operating.
If no noise, check the relay for the fuel pump. Located on the diagram for the fuse box located under the hood of the car.
use the wiper relay (if the wiper work) to test the fuel pump. If the car starts leave the wiper relay installed in teh fuel pump slot and drive to get U a new wiper relay.
If the fuel pump still don't kick on then its either wiring or a bad fuel pump. U can check for voltage at the tank before U buy a new pump. Abt $280 new.
You should try checking the fuel pressure to see if it too low. If the pump sat for a long time like that and then was turned on for awhile it may have bought the farm. It may still be pumping, but just not enough. Try givng it a compression check as well just to see if it has any problems there.
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