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1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

fuel issues

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Old Feb 29, 2016 | 05:21 PM
  #21  
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Originally Posted by forci8
Yes I am 100% sure because it starts right up when I spray starting fluid into the throttle body.
Ah yes, I knew that. DUH.

Have you tried doing a scan for codes?

I would check and see if your pipe for your PCV valve is in good condition. Any cracks, etc. can prevent it from firing.

I find it hard to believe that all 8 injectors take a dumb at the same time, but I would check them with a multimeter. They should measure at around 16 ohms.
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Old Feb 29, 2016 | 05:24 PM
  #22  
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One more thing.... do you have another key you could try? I wonder if your chip in your key is possibly fouled up.
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Old Feb 29, 2016 | 07:26 PM
  #23  
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If it's firing when he sprays starting fluid in it, it's not the ignition or the key. It's definitely a fuel issue. I'd almost want to pull the fuel rail up with the injectors still attached & place some cups or something under the injectors while someone else turns the key to the on position for a second. At least then you could tell if any fuel is making it out of the rail.
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Old Feb 29, 2016 | 07:27 PM
  #24  
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But beware, that's a fire hazard. Keep an extenguisher handy. Lol
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Old Feb 29, 2016 | 07:33 PM
  #25  
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Originally Posted by forci8
I put a meter on it today and at the injector itself it is showing 3 ohms and when you crank the motor the harness that connects to the injector is showing 6.6 volts. I'm not sure what the correct volts should be
Don't have wiring diagram to look at nor am I a tech .....

I would check voltage to ground at the injector without cranking the engine. You should have 12V. If you back-probe the connector while it's plugged in you should have 12V to ground on both wires= injector coil not open. The PCM should be pulsing the ground while engine is cranking. I'm not sure but I think the 6.6V reading you got is an average volt reading do to engine cranking.

Last edited by 4Stroke; Feb 29, 2016 at 07:35 PM.
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Old Feb 29, 2016 | 07:51 PM
  #26  
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You guys have all been great and I appreciate the help. I think I am going try and pull the rail up and see if fuel comes out as was previously mentioned. I can crank the engine myself by just using a screwdriver on the starter relay. It wont be dangerous because its not starting anyway lol. I never pulled a fuel rail before but I would imagine its not too difficult.
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Old Mar 1, 2016 | 09:28 AM
  #27  
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Make sure that the key is in the ON position when you crank it over. Otherwise the injectors will not be powered.

The best way to test the injectors is to pull them individually and use the following links method. I got this from @Jbrew a long time ago.

http://oldfuelinjection.packrad.net/page82.html
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Old Mar 1, 2016 | 09:35 AM
  #28  
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And an after thought before you try to turn it over with the fuel rail pulled. The rail bolts in place "clamping" the fuel injectors between the rail & the head. If you apply fuel pressure to them with the rail off, it will probably blow them out of the rail spraying fuel in all directions. Please disregard my suggestion & use the method I sent you in the link to test/clean/rebuild the injectors.
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Old Mar 1, 2016 | 01:29 PM
  #29  
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I decided not to remove the rail and replace the tank and fuel pump. I attached a pic of my gauge and also one of the culprit I am working on. Last week when I checked the pressure it would hold at 40 psi with the key on but now I cant get it to go over 30 psi. My fuel tank leaks when I fill it more than half way anyway so, it definitely needs replacing. Looking briefly online it seems JC Whitney has the best prices so I will probably order it from there. I will update when I receive the pump and tank and install everything. Also, when I remove the gauge it almost seems like the spray that comes out has some water in it. I may be hallucinating at this point but it doesn't look like good gas and its not very old. Thanks again for everyones help.



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Old Mar 1, 2016 | 02:06 PM
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Ethanol is hygroscopic. It absorbs moisture from the air.
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