1989 Ford F-150 fuel problems

Tiny
REDNECK5318
  • MEMBER
  • 1989 FORD F-150
Engine Performance problem
1989 Ford F150 V8 Four Wheel Drive Manual 147k miles

my truck is running funny an my fuel pump is makeing a wierd out of the ordinary sound, I know it has a new fuel pump an front gas tank I dont use the rear.I thought I wran out of gas so I put two gallon in to make it home an it acts like its wants to run but as soon as u give it some gas it bogs out an spudders and dies I thought maybe I had soomething in my air intake tubes an nothing an now thefuel pump makes a loud whine instead of the normal quieter sound im thinking maybe someone put something in my tank but ho do I drain it useing the fuel pump to pump it all out an what doyall think the best plan of action should be?
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Tuesday, July 20th, 2010 AT 9:55 PM

12 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
The only way to properly clean the tank is to remove it. However, before that, I would recommend checking fuel pump pressure. The "new" pump may be bad. If you need directions, let me know.

Joe
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Tuesday, July 20th, 2010 AT 10:03 PM
Tiny
REDNECK5318
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Sure would like the know how an thank ya sir
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Wednesday, July 21st, 2010 AT 2:04 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Here is a how to for checking it. It includes directions and a video showing what you are to do and what to look for. Let me know what you find.

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

Joe
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Wednesday, July 21st, 2010 AT 3:19 PM
Tiny
REDNECK5318
  • MEMBER
Ok so far I pulled the fuel filter replaced it but first I pulled it an darin the line from the fuel rail to the fuel filter an drained the tank replaced the filter an brand new gas but still same problem an unfortunatly I have no fuel pressure gauge. It will start run for like 10-15 seconds then starts sputtering an bogging down an cuts off an the pump is smakeing a real loud whine now so im at a stand still any other plans of attack an thank sofar for ur help
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Friday, July 23rd, 2010 AT 4:27 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
It sounds like a bad fuel pump. Have you checked fuel pump pressure?
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Saturday, July 24th, 2010 AT 1:05 AM
Tiny
REDNECK5318
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No not yet I dont have a gauge yet but thats next what should the gauge read while testing the pressure
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Saturday, July 24th, 2010 AT 3:06 AM
Tiny
82PONTIAC
  • MEMBER
Couldn't it also be the accelerator pump or power pump in the carburetor?
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Saturday, July 24th, 2010 AT 7:00 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
I believe they are fuel injected in 89. If I am correct, there is no accellerator pump or carb. If something has been changed, let me know.
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Saturday, July 24th, 2010 AT 10:21 PM
Tiny
REDNECK5318
  • MEMBER
Ya itfuel inje with a big plenum an that goofy looking throttle body with the huge ugly tubes for air intake its the 5.0
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Sunday, July 25th, 2010 AT 7:30 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
I would recommend checking fuel pump pressure. Have you tried that yet?
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Monday, July 26th, 2010 AT 1:45 AM
Tiny
REDNECK5318
  • MEMBER
Not yet but what should the gauge read when I do check it
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Monday, July 26th, 2010 AT 2:25 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
With the engine running, it should be between 35psi and 45psi.

Here is a how to video for checking it. Let me know what you find.

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

Joe

NOTE: The pressure I listed is for a V8 as you listed. If you have the 4.9, let me know.
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Tuesday, July 27th, 2010 AT 12:15 AM

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