wiring problem?
Thread Starter
|
New User
Joined: Jun 2002
Posts: 22
Likes: 0
From: ca
wiring problem?
I have an 85' F250 with a 460. Here is my problem...yesterday, my truck died a couple of times, would start back up, and run for a very short time. I checked to make sure the fuel pumps were working, and they were. I had plenty of fuel.
I decided to check the fuses, and the 15 amp warning lamp fuse was blown. I replaced it, the truck ran fine for a while, and then died again. The same fuse was again torched. This happened once before, several months ago, and replacing the fuse cured the problem until now. Basically, I torched the same fuse three times within a one mile span, just so I could limp back home.
The bowls are filling up with fuel, but the fuel pumps seem to disengage when the vehicle is in "run" mode.
Any ideas what is going on here?
I decided to check the fuses, and the 15 amp warning lamp fuse was blown. I replaced it, the truck ran fine for a while, and then died again. The same fuse was again torched. This happened once before, several months ago, and replacing the fuse cured the problem until now. Basically, I torched the same fuse three times within a one mile span, just so I could limp back home.
The bowls are filling up with fuel, but the fuel pumps seem to disengage when the vehicle is in "run" mode.
Any ideas what is going on here?
Moderator
Joined: Jan 2001
Posts: 56,992
Likes: 2,741
From: Virginia
wiring problem?
Don't you have an oil pressure switch that controls the fuel pumps? I think the fuel pump relays get power from the keyswitch in start, but after the truck is running, the relays get power from an oil pressure switch, so they shut off incase the truck stalls in an accident.
New User
Joined: Aug 2003
Posts: 8
Likes: 0
wiring problem?
I had a 69 Mustang that got a clogged fuel filter once. The symptoms were similar to what you reported. With the clogging, a limited amount of fuel could come through, so I could drive it a little, then the engine would die.
By the time I switched off, got out, and checked the fuel bowls, they were full, and I could start back up and run it a little then go thru the same thing again.
I finally found that the fuel filter was partially clogged. The fuel pressure on the inlet side of the filter was a good bit higher than the outlet side, and the flow was limited.
I added "Change Fuel Filter" to my tune-up checklist after that.
CM
By the time I switched off, got out, and checked the fuel bowls, they were full, and I could start back up and run it a little then go thru the same thing again.
I finally found that the fuel filter was partially clogged. The fuel pressure on the inlet side of the filter was a good bit higher than the outlet side, and the flow was limited.
I added "Change Fuel Filter" to my tune-up checklist after that.
CM
Thread
Thread Starter
Forum
Replies
Last Post
Neal05
6.0L Power Stroke Diesel
11
Nov 28, 2012 05:48 AM
Neal05
1999 - 2016 Super Duty
4
Nov 26, 2012 08:34 AM
team green
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
15
Dec 14, 2009 12:25 PM
Littlebuddy
Fuel Injection, Carburetion & Fuel System
1
Feb 21, 2004 08:44 PM
