fuel pump wont run. Help
Thread Starter
|
Senior User
Joined: Mar 2006
Posts: 435
Likes: 0
fuel pump wont run. Help
unless im wrong I have never seen an electric fuel pump not come on with the key on but will when your cranking the motor. I replaced the fuel pump and Im getting the same thing it will start but some times if you tap the gas it will die and other times it will run. I pulled the fuel filter and turned on the key but I dont get any gas but when I crank the motor gas will come out. 1992 b-2600. Any Ideas
Posting Guru
Joined: Mar 2005
Posts: 1,533
Likes: 1
From: Dexter, MI
When you turn the ignition to "ON" but not to "START," you should hear the fuel pump run for a few seconds. Do you hear the pump run? If not, you may need to replace the fuel pump relay. It is located beneath the engine compartment fuse box.
If the pump runs, check for fuel pressure. There is a Schrader type valve on the fuel rail. Also, pull the vacuum line off the fuel pressure regulator. If there is gas in the line, the regulator is bad.
If the pump runs, check for fuel pressure. There is a Schrader type valve on the fuel rail. Also, pull the vacuum line off the fuel pressure regulator. If there is gas in the line, the regulator is bad.
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
Something is whacked with the PCM/ECA. Take a couple of minutes to pull the codes & see if that gives you any clues such as a code 511 ECA memory failure or maybe a 513 ECA voltage failure..
The ECA/computer is supposed to ground the pump relay & run the pump for 2 seconds when the key is turned one click. When the engine is running & the ECA sees ignition pulses it holds the ground to the relay to keep the pump running.
BTW do all the dash lights & the check engine light come on when you turn the key one click?
The ECA/computer is supposed to ground the pump relay & run the pump for 2 seconds when the key is turned one click. When the engine is running & the ECA sees ignition pulses it holds the ground to the relay to keep the pump running.
BTW do all the dash lights & the check engine light come on when you turn the key one click?
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
Scanners are so cheap that I bought one many moons ago.
There used to be a link in the "read first tech info" for pulling codes with a paper clip, but I see it's gone.
Do a google search "pulling EEC-4 codes" & you should find something.
Edit
I'm sure your pump relay is good or the pump would'nt run at all
But if you want to test it, just connect the coil side lugs to your battery & it should click.
There used to be a link in the "read first tech info" for pulling codes with a paper clip, but I see it's gone.
Do a google search "pulling EEC-4 codes" & you should find something.
Edit
I'm sure your pump relay is good or the pump would'nt run at all
But if you want to test it, just connect the coil side lugs to your battery & it should click.
Thread Starter
|
Senior User
Joined: Mar 2006
Posts: 435
Likes: 0
thanks I will give that a shot. I called the auto parts store and they said the only way to scan that is with the scanner that only machines have
Trending Topics
Thread Starter
|
Senior User
Joined: Mar 2006
Posts: 435
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
If you had a 96 or newer the parts store would be correct & you'd need an obd-2 scanner.
Heres what you need to find uder the hood to pull the codes.
Super High Output
Good luck with it.
Heres what you need to find uder the hood to pull the codes.
Super High Output
Good luck with it.
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
It took me awhile to find the miserable thing on my 87 Ranger as it was hanging at the end of it's wires near the heater blower motor.
Much better setup on my 95 Taurus which had it clipped to the passenger side firewall.
I have no idea where it would be on your 92.
Much better setup on my 95 Taurus which had it clipped to the passenger side firewall.
I have no idea where it would be on your 92.
Thread Starter
|
Senior User
Joined: Mar 2006
Posts: 435
Likes: 0
I did find when you test the ful pump preasure that you have to jumper 2 wires with the key on to start your pump so it sounds to me that just turning on the key dosent start your fuel pump. If thats corect it would be the first electric fuel pump I have heard of that dosent come on when the key is turned. I did find a few plugs not conected just hanging there with no place to go but none of them look like the pics in the diagram, Maybe start back on the ignition. Do you have any other thoughts. Thanks
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
Well, i've always thought that the Mazda & Ranger pickups were twins. Maybe thats not the case??
If you have the Haynes or Chiltons manual for your truck, it should tell you how to pull the codes. It should also have a pump circuit wiring diagram.
If you have the Haynes or Chiltons manual for your truck, it should tell you how to pull the codes. It should also have a pump circuit wiring diagram.
Thread
Thread Starter
Forum
Replies
Last Post
DougieWebb
1973 - 1979 F-100 & Larger F-Series Trucks
33
Mar 25, 2013 08:35 AM
19fifty4
1948 - 1956 F1, F100 & Larger F-Series Trucks
14
Feb 8, 2012 09:48 PM
Peter94
Fuel Injection, Carburetion & Fuel System
7
Oct 19, 2006 10:55 PM
therealulysses
Explorer, Sport Trac, Mountaineer & Aviator
6
Mar 9, 2006 11:53 AM