1991 Ford F-150

Tiny
SCB0317
  • MEMBER
  • 1991 FORD F-150
1991 Ford F150 6 cyl Two Wheel Drive Manual

the fuel pumps keep running and engine will not turn over
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Sunday, November 15th, 2009 AT 3:18 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
What I need you to do is check the fuel pump pressure to the fuel rail. If the pump keeps running, chances are something has come apart on the tank. Here is a how to for checking the pressure.

http://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

Let me know what you find.

Joe
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Monday, November 16th, 2009 AT 10:05 PM
Tiny
SCB0317
  • MEMBER
Tried the fuel pressure test it was 55 have replaced fuel filter, relay, and regulator please help
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Wednesday, November 18th, 2009 AT 3:09 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Okay, I'll do my best to help you get it running. Just bear with me asking questions because I'm not there to check things myself. Will the vehicle start with starting fluid? When you say, "It won't turn over, " do you mean the starter isn't working or it does but the engine won't start? I have to ask because everyone has a different way of saying the starter doesn't work or it cranks but won't start.

Let me know.

Joe

PS: It's 10:27PM eastern time. I'll be check my email within the next hour. I look forward to your reply if you are on line.
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Wednesday, November 18th, 2009 AT 9:24 PM
Tiny
SCB0317
  • MEMBER
Yes the truck will start with starting fluid but the pumps keep running and if you give it gas it chokes out thank you so much
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Thursday, November 19th, 2009 AT 4:03 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
You have good fuel pressre and it starts with starting fluid, so that tells me you are getting spark which is good. The fuel pressure is good, so the only thing left is the fuel injector. You need to check to see if the fuel injector is getting power. Something tells me that is where the problem is. THree of the injectors will have a tan wire and three will have a white wire on the supply side. On the other end of the injector will be a red wire at all 6 cylenders. WHat I need you to do is using a noid light (ask to borrow at a parts store) check for power to all of the wires I described. You will not get a solid light indicating constant power, but rather you should see a pulsing light each time the injector is told to inject fuel to the cylender. A noid light is simply a small incandescent bulb in a socket with pins that plug directly into the wiring harness leading to your fuel injectors. Crank the engine over. If the noid light flashes, the computer is operational enough to send voltage to the injector.

Here is a picture of one connected to an injector plug:


http://www.2carpros.com/forum/automotive_pictures/249084_noid_1.jpg



This sounds harder to do than it is. If you got through checking fuel pressure, you shouldn't have any trouble with this. Something tells me that the light won't light up for you. If you can't get your hands on a noid light, you could use a test light or volt meter, but it is going to be a lot harder.

Let me know what you find. If there is no pulse to the injectors, then we have to start working backwards to problem solve. It can take some time, but eventually, we'll get it. If you knew me, you now understand why I'm starting to loose my hair (LOL).

Joe
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Thursday, November 19th, 2009 AT 10:03 PM

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