No power to fuel pump
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Junior Member
Joined: Mar 2001
Posts: 4
Likes: 0
From: Camdenton, Missouri, USA
No power to fuel pump
Okay guys I changed the fuel filter, fuel pump, the high pressure pump still she won't start. I can not smell gas, so I decided for some reason I'm getting no charge to the pump, test every thing I could think of. There is no power to the fuel shut-off switch, fuel pumps, no fuel pressure at pressure outlet no air no nothing. There must be kind of relay or something I'm missing. Please help. I'm more than stumped. 1986 ford f150 4x4 - 302
Senior Member
Joined: Oct 2000
Posts: 199
Likes: 0
From: Austin, TX, USA
Check the fuel pump relay. It should be a big relay in the main fuse block. If you pop the top, there should be a diagram that says which one is which. Just pull the fuel pump relay, take it with you to your local O'Rielly or Autozone, or whatever. They should be around $15-$20 or so. Plus you might be able to return it if that's not the problem.
You might also check to see if the spark plug wires are connected correctly. That info should be in your owners manual. Also inspect the distributer. If it is dirty inside or anything looks wierd.
Other than that, I'm at a lose. I read your previous post also, but I can't think of anything else that it might be. Hope this helps.
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2000 Silver F-150 XL Sport
Reg. Cab, Reg. Bed, 4.2L V6, 5-speed, 4x2
mods:
Tailgate lock, Generic bedliner
285/75r16 BFG AT ko (33.1x11.4)
Sony CD player, Blaunpunkt 5.25" speakers
Crimeguard alarm, Power locks
---------------------
Never let your schooling interfere with your education --Mark Twain
You might also check to see if the spark plug wires are connected correctly. That info should be in your owners manual. Also inspect the distributer. If it is dirty inside or anything looks wierd.
Other than that, I'm at a lose. I read your previous post also, but I can't think of anything else that it might be. Hope this helps.
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2000 Silver F-150 XL Sport
Reg. Cab, Reg. Bed, 4.2L V6, 5-speed, 4x2
mods:
Tailgate lock, Generic bedliner
285/75r16 BFG AT ko (33.1x11.4)
Sony CD player, Blaunpunkt 5.25" speakers
Crimeguard alarm, Power locks
---------------------
Never let your schooling interfere with your education --Mark Twain
Senior Member
Joined: Sep 2000
Posts: 552
Likes: 0
I know on ford cars, there is a fuel pump bump switch in the trunk. If the vehicle has been bumped, hard, the pump shuts down until the switch is reset. I don't know if it is in trucks or not, but it might be worth asking about.
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2001 Lariat SCrew Oxford White / House of Kolor Sunset Orange Pearl 2Tone.
TruckMaster Designs FD630-S AirDam,AirAid,Gibson9504/Split Rear Exhaust,Fac Moon Roof,3:55LS,6CD,Gen III/Beige,Steps,Slider,Tow,Capt's,Bed Extd, Bell Tech 2" Shackles
Check out my Photo's at
http://photos.yahoo.com/bc/jeff_east
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2001 Lariat SCrew Oxford White / House of Kolor Sunset Orange Pearl 2Tone.
TruckMaster Designs FD630-S AirDam,AirAid,Gibson9504/Split Rear Exhaust,Fac Moon Roof,3:55LS,6CD,Gen III/Beige,Steps,Slider,Tow,Capt's,Bed Extd, Bell Tech 2" Shackles
Check out my Photo's at
http://photos.yahoo.com/bc/jeff_east
Member
Joined: Mar 2001
Posts: 32
Likes: 0
From: Salt Lake City, UT
Hey Jen,
When you are first trying to start your vehicle and you only turn the key on but don't turn the engine over can you hear the fuel pump start pumping fuel to the engine? It should turn on momentarily to build the pressure in the fuel lines before you try to turn the engine over.
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90'F150 W/5.0L 302
K&N Generation II Filter
PowerAid Throttle Body Spacer,Rhino Bed Lining and hopefully to come a set of Tri-Y Thorley Headers
When you are first trying to start your vehicle and you only turn the key on but don't turn the engine over can you hear the fuel pump start pumping fuel to the engine? It should turn on momentarily to build the pressure in the fuel lines before you try to turn the engine over.
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90'F150 W/5.0L 302
K&N Generation II Filter
PowerAid Throttle Body Spacer,Rhino Bed Lining and hopefully to come a set of Tri-Y Thorley Headers
Thread Starter
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Junior Member
Joined: Mar 2001
Posts: 4
Likes: 0
From: Camdenton, Missouri, USA
<font face="Verdana, Arial" size="2">Originally posted by badhabit:
Hey Jen,
When you are first trying to start your vehicle and you only turn the key on but don't turn the engine over can you hear the fuel pump start pumping fuel to the engine? It should turn on momentarily to build the pressure in the fuel lines before you try to turn the engine over.
</font>
Hey Jen,
When you are first trying to start your vehicle and you only turn the key on but don't turn the engine over can you hear the fuel pump start pumping fuel to the engine? It should turn on momentarily to build the pressure in the fuel lines before you try to turn the engine over.
</font>
I don't have anything I tryed this because it said that was the way to prime it. but nothing.
Senior Member
Joined: Dec 1969
Posts: 996
Likes: 1
From: TUCSON,AZ,USA
The so called fule pump bump switch is up near the computer. You could have upset that switch when changing filter and or pump. Reset the switch before you spend too much money.
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97 F-150, 2WD, Reg Cab,Flareside,Dk Toreador Red, Windsor 4.6, Magnecor 8.5mm wires, Bosch Plat +4s, 3.55 LS, EGR Bug Deflector, ******* Bed Cover, Bed Liner, XL Full Length Running Boards, Air Aid Kit, Gibson Single Out Cat Back, Superchips, TransGo Shift Kit, Hellwig Rear Sway Bar, Hellwig 2500# Overload Springs,Energy Suspension Polyurethane Front Sway Bar Bushings, 265 70 16 tires, Rancho RS9000 shocks,Expedition Center Console
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97 F-150, 2WD, Reg Cab,Flareside,Dk Toreador Red, Windsor 4.6, Magnecor 8.5mm wires, Bosch Plat +4s, 3.55 LS, EGR Bug Deflector, ******* Bed Cover, Bed Liner, XL Full Length Running Boards, Air Aid Kit, Gibson Single Out Cat Back, Superchips, TransGo Shift Kit, Hellwig Rear Sway Bar, Hellwig 2500# Overload Springs,Energy Suspension Polyurethane Front Sway Bar Bushings, 265 70 16 tires, Rancho RS9000 shocks,Expedition Center Console
Thread Starter
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Junior Member
Joined: Mar 2001
Posts: 4
Likes: 0
From: Camdenton, Missouri, USA
<font face="Verdana, Arial" size="2">Originally posted by r0land:
Check the fuel pump relay. It should be a big relay in the main fuse block. If you pop the top, there should be a diagram that says which one is which. Just pull the fuel pump relay, take it with you to your local O'Rielly or Autozone, or whatever. They should be around $15-$20 or so. Plus you might be able to return it if that's not the problem.
You might also check to see if the spark plug wires are connected correctly. That info should be in your owners manual. Also inspect the distributer. If it is dirty inside or anything looks wierd.
Other than that, I'm at a lose. I read your previous post also, but I can't think of anything else that it might be. Hope this helps.
</font>
Check the fuel pump relay. It should be a big relay in the main fuse block. If you pop the top, there should be a diagram that says which one is which. Just pull the fuel pump relay, take it with you to your local O'Rielly or Autozone, or whatever. They should be around $15-$20 or so. Plus you might be able to return it if that's not the problem.
You might also check to see if the spark plug wires are connected correctly. That info should be in your owners manual. Also inspect the distributer. If it is dirty inside or anything looks wierd.
Other than that, I'm at a lose. I read your previous post also, but I can't think of anything else that it might be. Hope this helps.
</font>
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Senior Member
Joined: Oct 2000
Posts: 199
Likes: 0
From: Austin, TX, USA
Good Luck! I have a friend with an '84 with a 302. I know he has had numerous prolems with his. I feel your pain...in a way. BTW, my friend dubed his, 'the beast', because of how it sounds when he starts it, and how it drives on the freeway...anyways, hope you get yours running.
------------------
2000 Silver F-150 XL Sport
Reg. Cab, Reg. Bed, 4.2L V6, 5-speed, 4x2
mods:
Tailgate lock, Generic bedliner
285/75r16 BFG AT ko (33.1x11.4)
Sony CD player, Blaunpunkt 5.25" speakers
Crimeguard alarm, Power locks
---------------------
Never let your schooling interfere with your education --Mark Twain
------------------
2000 Silver F-150 XL Sport
Reg. Cab, Reg. Bed, 4.2L V6, 5-speed, 4x2
mods:
Tailgate lock, Generic bedliner
285/75r16 BFG AT ko (33.1x11.4)
Sony CD player, Blaunpunkt 5.25" speakers
Crimeguard alarm, Power locks
---------------------
Never let your schooling interfere with your education --Mark Twain
Member
Joined: Mar 2001
Posts: 32
Likes: 0
From: Salt Lake City, UT
There should also be some type of fuel pump relay or something under the hood on the drivers side on top of the wheel well that is black and has I think 3 or 4 connectors coming out of it and one of them says fuel pump right on top. On my 90' occasionally the fuel pump will stay on after the key is out and the truck is entirely off. After unpluging the connector that says Fuel Pump on it the pump shuts off. Every once in a while my truck won't start so I go and wiggle that connector around and then the pump works. So maybe that is something that you can look into. Do you have dual tanks and if does it do this with both tanks?
Senior Member
Joined: Mar 2000
Posts: 411
Likes: 0
From: Pa
Jen
Did you find the bump switch? I think it's above the gas pedal someplace. It's a little black plastic box with a white button in the middle. the button should be almost flush with the rest of the box.
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97 Lariet-sc-4.6-4x off road-auto-3.55 LS-
superchip-Airraid-Perma-cool electric fan & controller
Did you find the bump switch? I think it's above the gas pedal someplace. It's a little black plastic box with a white button in the middle. the button should be almost flush with the rest of the box.
------------------
97 Lariet-sc-4.6-4x off road-auto-3.55 LS-
superchip-Airraid-Perma-cool electric fan & controller