fuel pump problem
Thread Starter
|
New User
Joined: Feb 2010
Posts: 7
Likes: 0
fuel pump problem
Well lets see here.
4.9 88 ford f150 (one tank)
Got it the other day cheap. Guy said that you had to unhook the batray and rehook it up each time you wanted to start it. Well thats not the problem now. Took it off the trailer. pulled it up the road aout 20 feet and the thing died and rolled back to the yard.
Now when I turn the key over I dont hear the fuel pump. So I got a new relay. Still no go. I am getting 12 volts Hot and 12 volts from the switch. I gound the one that goes back to the ecm. But it still want fire. But if I put fuel in the intake it will run till ful is gone.
Any help?
4.9 88 ford f150 (one tank)
Got it the other day cheap. Guy said that you had to unhook the batray and rehook it up each time you wanted to start it. Well thats not the problem now. Took it off the trailer. pulled it up the road aout 20 feet and the thing died and rolled back to the yard.
Now when I turn the key over I dont hear the fuel pump. So I got a new relay. Still no go. I am getting 12 volts Hot and 12 volts from the switch. I gound the one that goes back to the ecm. But it still want fire. But if I put fuel in the intake it will run till ful is gone.
Any help?
Thread Starter
|
New User
Joined: Feb 2010
Posts: 7
Likes: 0
Well its Good because if I just the relay the pump comes on. Its beteen the relay and the pump.
Elder User
Joined: Feb 2008
Posts: 797
Likes: 1
From: ohio
check out the wiring at the relays, wiggle them around with the key in run position. And also check out the ecm relay next to fuel pump relay and its connections also
Trending Topics
Thread Starter
|
New User
Joined: Feb 2010
Posts: 7
Likes: 0
OK I think I am going to try the junk yard tomarrow and get a computer, I will let you all know.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Thread Starter
|
New User
Joined: Feb 2010
Posts: 7
Likes: 0
Ok I got the computer for 35 bucks. At frist no go. Then I done some beating on the fuel pump relay and it started working. But now the thing runs rough. Want stay idleing. I may put the old computer in there and see if that fixes anything. If it doesnt what sensors control idle? I may need to start replaceing them one at a time. Can anyone list most liket in order.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
First check all the vacuum lines.
Then check the wiring and vacuum to the MAP sensor.
Also check the wiring under the EEC Power and Fuel Pump relays.
Then run the KOEO self-test and see what codes you get.
If you do not know how to run the self-test go to this URL:
Ford Fuel Injection How To Run a Self-Test
Then check the wiring and vacuum to the MAP sensor.
Also check the wiring under the EEC Power and Fuel Pump relays.
Then run the KOEO self-test and see what codes you get.
If you do not know how to run the self-test go to this URL:
Ford Fuel Injection How To Run a Self-Test
Senior User
Joined: Oct 2008
Posts: 183
Likes: 0
before you start throwing parts at it, i would check the fuel system to make sure it is working properly since you were having trouble with it before. i still think the pump is going bad...get yourself a fuel pressure gauge and tell us what you are getting. btw the inertia switch on my truck is located on the firewall behind the fuse box on the drivers side.
Thread Starter
|
New User
Joined: Feb 2010
Posts: 7
Likes: 0
Update . The ground going to the battry from the Computer. Wasnt on good. Fixed that. Now the fuel pump turns on each time. I pump new temp senor and it idles rough. Dont know I will look into it more in the next few days.
