Doesn't want to start what now?
Thread Starter
|
New User
Joined: Feb 2006
Posts: 11
Likes: 0
Doesn't want to start what now?
This questions is regarding my '89 F150 ext cab 300 I6 5speed dual fueltanks. She was parked outside for one year. I tried to start her up 2 weeks ago and dicovered a wiring problem. The problem has been solved now (I had a loose ground connection at the starter motor).
Now she is cranking but doesn't want to start. I checked the inertia switch which seems to work fine. I checked the fuelpump relais (I hope I got the right one since the cover is gone) and it seems to work too. If I am not mistaken this is the green colored relais by the airbox. The relais is clicking when the ignition is turned on. I checked voltage at the fuelpump under the cabin and don't get any reading and no humming noise hapening. Is there a way of testing the fuelpump (maybe hocking up 12 volt to it)? When I switch between the tanks I get different fuel amount readings which seems to be right as far as I remember. Both tanks are leaking at the top, the rear tank has not been used in years. The front tank only gets half a fill at then most. I now this is a safety issue but the truck gets very little use (less than 500km a year, Only to haul stuff to the dump).
So what is the next thing for me to do at this stage.
Any help is appreciated.
Thanks Martin
Now she is cranking but doesn't want to start. I checked the inertia switch which seems to work fine. I checked the fuelpump relais (I hope I got the right one since the cover is gone) and it seems to work too. If I am not mistaken this is the green colored relais by the airbox. The relais is clicking when the ignition is turned on. I checked voltage at the fuelpump under the cabin and don't get any reading and no humming noise hapening. Is there a way of testing the fuelpump (maybe hocking up 12 volt to it)? When I switch between the tanks I get different fuel amount readings which seems to be right as far as I remember. Both tanks are leaking at the top, the rear tank has not been used in years. The front tank only gets half a fill at then most. I now this is a safety issue but the truck gets very little use (less than 500km a year, Only to haul stuff to the dump).
So what is the next thing for me to do at this stage.
Any help is appreciated.
Thanks Martin
Postmaster
Joined: Jul 2005
Posts: 3,248
Likes: 0
Check the fuel filters, probable two, one located in the black round container on the driver side frame rail, where the two lines for each fuel tank meet. The other is located about 3 to 4 feet forward on the same frame rail. The black round container has a spin off cap at the base and the filter is inside.
When you first turn your key to the on position, listen for the fuel pump.
Postmaster
Joined: Jul 2005
Posts: 3,248
Likes: 0
Check the fuses in the cab, Check the battery cables for any broken or loose connections, Check the wires at the starter solenoid. Will need to check for battery voltage at the fuel tank with a voltage meter, The fuel pump only kick on for about 2 to 3 seconds and will shut down when the key is turned to the on position. There should be a check valve which looks like a tire valve which mounts to the fuel rails on the intake, and can also be used to check for fuel..
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
Originally Posted by red89F150
Fuel pump is not working, the pump relais is switching when the ignition is turned on.
Thread Starter
|
New User
Joined: Feb 2006
Posts: 11
Likes: 0
So, I took the relais out and hocked up 12 volt to it and had the relais switching (I opened the housing and could see it) . On the 2 other relais teminals I hooked up a DMM and had current flowing when the relais switched on. I installed the relais in the vehicle and it works the same way there. Then I checked the fuel pump under the cab. When the ignition is turned off I have current flowing on the harness plug. When I turn the Ignition on the current changes. Then I hooked up the fuel pump again and had somebody turn the key for me. When the ignition is turned on for a short time I can feel very little humming on the pump. Is this normal. Maybe the pump is stuck and doesnt turn, I don't know. I can't hear any humming noise on the pump. How do you check if the pump is actually pumping fuel?
Trending Topics
Postmaster
Joined: Jul 2005
Posts: 3,248
Likes: 0
Two ways of checking if the fuel pump is pumping fuel. With a fuel pressure guage hooked to the fuel rail check valve on engine or disconnect the fuel line and run the fuel line into a container (empty coca cola bottle works fine) and turn the key on. Be careful when working with fuel.
_______
Buck
_______
Buck
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
ertds001
1994.5 - 1997 7.3L Power Stroke Diesel
3
Oct 1, 2010 11:02 AM
mercrs
1987 - 1996 F150 & Larger F-Series Trucks
5
Aug 31, 2008 07:14 PM
ANDERS
Explorer, Sport Trac, Mountaineer & Aviator
17
Nov 15, 2005 03:26 PM