Fuel issue?
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Freshman User
Joined: Jan 2013
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From: Wichita Falls, TX
Fuel issue?
My 89 F250 7.5L acts like it is running out of fuel. I drove to my farm (20 minutes) and the truck ran great. Got down a bumpy road and the truck acted like it was running out of gas. I pressed the gas pedal, and it tried to catch, but eventually died. Tried to start it, and nothing. Sat for 3-5 minutes, and then it started, but still hesitated like it was short on fuel.
I got to my farm house and put in 10 gallons of gas (thought it was out). Started up and drove out of the property to the main road (3 miles or so). All of the sudded, it died again. Sat for 5 minutes or so (messed with the tank selector switch), and the truck fired up again. Another 3 miles, the truck died again. Sat 5 minutes again (rocked the tank selector switch a few times) and the thing fired up and got me ten miles home.
I have replaced the Ignition Control Mod, temp sensor, distributor. I just replaced fuel filters after all of this, but have not driven it. Is it a fuel pump? Help
I got to my farm house and put in 10 gallons of gas (thought it was out). Started up and drove out of the property to the main road (3 miles or so). All of the sudded, it died again. Sat for 5 minutes or so (messed with the tank selector switch), and the truck fired up again. Another 3 miles, the truck died again. Sat 5 minutes again (rocked the tank selector switch a few times) and the thing fired up and got me ten miles home.
I have replaced the Ignition Control Mod, temp sensor, distributor. I just replaced fuel filters after all of this, but have not driven it. Is it a fuel pump? Help
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From: Edmonton, Alberta
When the key cycles, you should hear it prime for about 2 seconds. Then when running you can hear them running if your next to the tank. When was the last time the fuel filter was changed?
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Freshman User
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From: Wichita Falls, TX
I just replaced them. There were two on there and they are different. The 3/8 filter allows flow toward the engine and the 5/16 filter was installed flowing toward the tank. Only the front tank works. Not sure if this is a stock set-up or not.
Senior User
Joined: Aug 2001
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From: Lexington Park, MD
(not positive).
It just seems if the fuel pump is working, then it is working. Does it work, then slack off? Not that familiar with electric fuel pumps
Try pulling the codes from the computer. They might tell you a great deal. Here's a link to the procedure:Fuel Injection Technical Library » How To Run a Self-Test
Hope this helps!
Chris
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From: Wichita Falls, TX
They are on two separate lines. Looks very strange to me as well. I will do some more probing when I get back home. Thanks for all the help
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Joined: Aug 2001
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From: Lexington Park, MD
I'm glad I'm able to help! Im gonna give you two pictures which may be an aid to you:
This picture shows the large test connector that is used to pull codes. It points out the fuel pump terminal on it. If you ground that terminal like the book says, and turn the truck to RUN, the fuel pump will run continuously. This will allow you to check the pressure better. Just use the selector switch to select the pump.
This next picture is of the fuel system plumbing. AS LONG AS your 89 is like the 91, it should look something like this.
It sounds like someone mounted a filter to your truck's return fuel line, since you said it goes the other direction. Possibly, anyway.
Hope this helps!
Chris
This picture shows the large test connector that is used to pull codes. It points out the fuel pump terminal on it. If you ground that terminal like the book says, and turn the truck to RUN, the fuel pump will run continuously. This will allow you to check the pressure better. Just use the selector switch to select the pump.
This next picture is of the fuel system plumbing. AS LONG AS your 89 is like the 91, it should look something like this.
It sounds like someone mounted a filter to your truck's return fuel line, since you said it goes the other direction. Possibly, anyway.
Hope this helps!
Chris
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Freshman User
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From: Wichita Falls, TX
That's what I was thinking. I don't think the truck was maintained very well. I went ahead and ordered two fuel pumps and a fuel pressure regulator. Insurance if nothing else
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