Odd Problem

Reply Subscribe

Thread Tools

Search this Thread

Nov 19, 2006 | 07:25 PM

joeenel

Thread Starter

New User

Joined: Nov 2006

Posts: 4

Likes: 0

Odd Problem

Hi all. This is my first post in this forum. 1988 F250 with a 460. Lately the truck will quit running. It just shuts off. Here is the odd part. When this happens the frame mounted fuel pump keeps running. The truck has 45 psi at the test port. The truck also has spark. If I turn the key off and then back on I know if the truck is going to run by listening to the fuel pump. If the pump runs for a second or so and then turns off the truck will start. If I turn the key on and the fuel pump keeps running the truck will not start. I believe that the ecu/ecm or whater you call the computer controls the fuel pump relay. My best guess is that the computer is bad. I have cleaned the wiring connector and nothing changed. Does any one in this forum have any thoughts on this problem? Sorry for such a long post but I am trying to give all the pertinant information.

Nov 19, 2006 | 07:31 PM

lv2race

Laughing Gas

Joined: Oct 2005

Posts: 1,226

Likes: 42

From: The OC

Have you checked for codes?

Nov 19, 2006 | 07:32 PM

mississauga

Elder User

Joined: May 2006

Posts: 623

Likes: 1

From: Mississauga,Ont.,Canada

From what I have read on this forum if the fuel pump does not cycle off when the key is turned on and the engine is not started it it would look like the ecm could be the problem.Maybe some of the other members have some suggestions.

Nov 19, 2006 | 08:48 PM

joeenel

Thread Starter

New User

Joined: Nov 2006

Posts: 4

Likes: 0

The check engine light does not come on but I do not know how to check for codes on this truck.

Nov 19, 2006 | 09:14 PM

alxsnmr

Fleet Mechanic

Joined: Mar 2005

Posts: 1,603

Likes: 1

From: St Louis

Have you checked to make sure the fuel pressure regulator doesn't have gas coming out the vacuum port?

Nov 19, 2006 | 10:13 PM

joeenel

Thread Starter

New User

Joined: Nov 2006

Posts: 4

Likes: 0

There is no fuel coming out of the vacuum side of the regulator and the regulator is working.

Nov 19, 2006 | 10:28 PM

quicklook2

Post Fiend

Joined: May 2004

Posts: 11,289

Likes: 6

From: Lakewood, Ohio

you need a new computer (eec).

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

Top 10 Ford Truck Tragedies

Joe Kucinski

Nov 20, 2006 | 07:45 PM

handyman43358

Postmaster

Joined: Aug 2004

Posts: 2,908

Likes: 2

From: West Mansfield, Ohio

Good call quicklook.

Clearly the problem here.

Just shop around. Most places dont have warranties on them anyways if I remember right. Remember cheaper probably isn't always better!