Disconnected battery ( NEG) , checked fuses , disabled command start. Fuel pump running with key initially turned, but the armed lock is enabled.Hooked battery booster
SOURCE: 1997 GMC K1500 4x4 5.7 ex.cab SFI injection system
Hey there boatright33,
A few things things immediately come to mind.
There may be a problem with the engine controller. You could check the
ODBII onboard diagnostics. Auto part stores will usually do this for
you at no cost.
When you pulled the ones that were/went bad, how did the filters look? Could there be particulate matter still in the tank causing them to fail.
I always put this one off until last. Check the injectors. Are they gummed up?
Let me know what you find out
Mike
SOURCE: shuts off while driving. no fuel pressure. pcm fuse blows/ fuel pump relay inserted.
Sounds like the fuel pump is shorted.
SOURCE: 1999 GMC Jimmy won't start.
firstly where is fuel pump relay as i have never seen a GMC jimmy sorry about that but have you ever seen a foden ?? well the first thing is to check the fuse,if fuse is ok which can be checked by looking at it as its transparent or a piece of wire with a light bulb .across the battery.to find the relay is easy if you dont know where it is,When this piece of americana decides to work just turn ignition on and listen for the click of relay ,then when it doesnt start listen for click again or rather an absence of a click,sounds more like a dodgy pump in the tank or the connections going to it.when it wont start try thumping the fuel tank with the ignition on and if it is a sticky pump you might hear it start then at least you will know where the fault is.Another fault that i have come across with relays is that where the relay is passing a heavy load then its possibe for the contacts to burn inside the relay.When this happens then if it is possible to seperate the relay cover and clean the contacts with a points file (remember them ) or a piece of fine emery paper if the cover breaks taking it apart then use a bit of black insulating tape to repair the cover.Thats assuming the pump is in the tank and not bolted to the chassis near the fuel tank but that design with external pump i havent seen on a europeon car for nearly 20yrs .
SOURCE: Engine cranks, won't start. Three days later, it starts???
probaly a fuel pump its common for vehicles to do that the best thing to do next is a fuel pressure check to verifiy its the pump
SOURCE: 2003 GMC Yukon - fuel pump
Check your ECM fuse. There should be 2 fuses for your ECM. It's the ECM that controls the function of the fuel pump. Good luck friend and it's also common for the wire harness from the frame to the fuel pump to go bad due to corrosion from the bad weather we get in the winter and rainy spring and fall.
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