Neglected truck
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2nd Gear
Joined: Aug 2022
Posts: 2
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Neglected truck
1997 Ford F150 with 4.6L has sat for about 3 years. I put some new gas and a new battery in it and tried starting it without any expectations and it won't start.
I figure the injectors are plugged up from bad gas.
Am I going to have other problems?
I know it ran good, without any problems before the owner parked it.
I'm an old school mechanic and never worked on fuel injection before.
I miss carbs right now.
I figure the injectors are plugged up from bad gas.
Am I going to have other problems?
I know it ran good, without any problems before the owner parked it.
I'm an old school mechanic and never worked on fuel injection before.
I miss carbs right now.
Last edited by Tclint; Aug 26, 2022 at 02:07 PM. Reason: more info
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2nd Gear
Joined: Aug 2022
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I determined I wasn't getting any fuel to the fuel rails. I checked the fuel filter and it seems to be ok.
With the fuel line off the fuel filter, should I see fuel running out when I turn on the ignition?
With the fuel line off the fuel filter, should I see fuel running out when I turn on the ignition?
Cargo Master
Joined: Dec 2015
Posts: 2,920
Likes: 515
Can't blame the pump for not running if it's not being told to run.
I don't recall if the bubble bodies have a dedicated fp relay or is it integrated into something bigger? If a standalone relay, bypass relays are great for troubleshooting but a jumper wire can achieve the same result with slightly less elegance.
Cargo Master
Joined: Jan 2016
Posts: 2,675
Likes: 377
So much this. But don't jump straight to fuel pump replacement as so many do. First check relays and fuses. AFTER all that then lower tank enough to get at electrical connector for pump and see if power (and ground) is getting that far.
Can't blame the pump for not running if it's not being told to run.
I don't recall if the bubble bodies have a dedicated fp relay or is it integrated into something bigger? If a standalone relay, bypass relays are great for troubleshooting but a jumper wire can achieve the same result with slightly less elegance.
Can't blame the pump for not running if it's not being told to run.
I don't recall if the bubble bodies have a dedicated fp relay or is it integrated into something bigger? If a standalone relay, bypass relays are great for troubleshooting but a jumper wire can achieve the same result with slightly less elegance.
- to trace and correct faults in a mechanical or electronic system.
No one said to jump straight to replacing the fuel pump. Listening to fuel pump lets you know if you need to diagnose (i.e trouble shoot) the fuel pump system or look for a clogged line.
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Mountain Pass
Joined: Mar 2021
Posts: 227
Likes: 47
From: Near Bragg Classified
The fuse for the fuel pump relay is # 19 (20a) under the dash by drivers left foot. The relay is under the hood driver side in the power distribution box. You also have a inertia fuel pump shut off behind front passenger kick panel. Fuel pump and pump module are at the tank.
Hope this helps.
Airborne 82.
Hope this helps.
Airborne 82.
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Hotshot
Joined: Jul 2020
Posts: 10,569
Likes: 2,677
From: Near Salt Lake City
The electrical systems are so robust and fail safe
I jump right on replacing the fuel pump, most of the time, if no pressure is present
The ones that have a fuel pump driver module, I inspect that first
Tclint has no FDM
I would have replaced the fuel pump already
If you are in doubt, just check the feed voltage to the pump, after you get the tank down far enough to access the wiring connector
I jump right on replacing the fuel pump, most of the time, if no pressure is present
The ones that have a fuel pump driver module, I inspect that first
Tclint has no FDM
I would have replaced the fuel pump already
If you are in doubt, just check the feed voltage to the pump, after you get the tank down far enough to access the wiring connector
Mountain Pass
Joined: Mar 2021
Posts: 227
Likes: 47
From: Near Bragg Classified
The electrical systems are so robust and fail safe
I jump right on replacing the fuel pump, most of the time, if no pressure is present
The ones that have a fuel pump driver module, I inspect that first
Tclint has no FDM
I would have replaced the fuel pump already
If you are in doubt, just check the feed voltage to the pump, after you get the tank down far enough to access the wiring connector
I jump right on replacing the fuel pump, most of the time, if no pressure is present
The ones that have a fuel pump driver module, I inspect that first
Tclint has no FDM
I would have replaced the fuel pump already
If you are in doubt, just check the feed voltage to the pump, after you get the tank down far enough to access the wiring connector
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