fuel injection beating me down!
Thread Starter
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More Turbo
Joined: Sep 2007
Posts: 552
Likes: 9
fuel injection beating me down!
wow folks
im about to throw in the towel... long story short im not getting fuel to the combustion chamber!
culprit..88 ford e-350 w/460 no start problem.
done so far
1.new dizzy w/module timing perfect
2.replaced computer actually tried 3
3.replaced relays at fender
4.installed new front fuel pump (excellent fuel pressure)
5.replaced fuel pressure regulator
shoot gas down the throttle body will fire right up.
i have power to the injectors. hot on both wires?
why wont this ford start?
I have resolved that i must tow it home after my 3rd trip 80 miles one way. i just dont know what else to try. i did notice a couple relays? mounted on the intake with vacuum lines to them could they be the problem?
now i know why i like carbureted engines so much. if it keeps going im gonna switch her over to an old school intake and carb.
if anyone has a clue i would love to hear it.
im about to throw in the towel... long story short im not getting fuel to the combustion chamber!
culprit..88 ford e-350 w/460 no start problem.
done so far
1.new dizzy w/module timing perfect
2.replaced computer actually tried 3
3.replaced relays at fender
4.installed new front fuel pump (excellent fuel pressure)
5.replaced fuel pressure regulator
shoot gas down the throttle body will fire right up.
i have power to the injectors. hot on both wires?
why wont this ford start?
I have resolved that i must tow it home after my 3rd trip 80 miles one way. i just dont know what else to try. i did notice a couple relays? mounted on the intake with vacuum lines to them could they be the problem?
now i know why i like carbureted engines so much. if it keeps going im gonna switch her over to an old school intake and carb.
if anyone has a clue i would love to hear it.
Senior User
Joined: Mar 2009
Posts: 470
Likes: 0
From: Washington County, Penna
hot on both wires on the injector.. does one or the other flash when you turn the engine over.. easiest way to test is with noid light, but ive used a regular test light to check it before... if it isnt flashing the injectors arent getting the signal to open and close
Thread Starter
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More Turbo
Joined: Sep 2007
Posts: 552
Likes: 9
thanks for the input guys. i didnt have my noid along with to test it for flashing. im ASSUMING that the injectors are not getting the proper signal.
now i can tell you that the vehicle sat for extended periods of time. and was only started every now and then. the man i bought it from claims it always fired right up, then one day.......
which is it fellas should both wires be hot or not?
now i can tell you that the vehicle sat for extended periods of time. and was only started every now and then. the man i bought it from claims it always fired right up, then one day.......
which is it fellas should both wires be hot or not?
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
If the ground path is open (which it will be with the engine off), there will be 12V on both sides of the injector. There won't be a voltage drop across the injector until the ground path is completed and there is a current through the injector coil.
Thread Starter
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More Turbo
Joined: Sep 2007
Posts: 552
Likes: 9
so i guess from what im hearing i need to use the noid on the harness and see if flashes while cranking.
assuming it flashes while cranking...then would the injectors themselves be faulty all 8?
and assuming it doesnt flash where might the problem lie?
apparently this is not too common of a problem. I know in all the years of me having ford trucks ive not run into a dead end like this. thanks all
assuming it flashes while cranking...then would the injectors themselves be faulty all 8?
and assuming it doesnt flash where might the problem lie?
apparently this is not too common of a problem. I know in all the years of me having ford trucks ive not run into a dead end like this. thanks all
That's where I'd look after you verify that the injectors are getting the ground signal from the ecu.
