Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Voltage and lights fluctuating while idling

Thread Tools
 
Search this Thread
 
Old Nov 24, 2007 | 01:26 PM
  #1  
wdchuck's Avatar
wdchuck
Thread Starter
|
New User
Joined: Nov 2007
Posts: 11
Likes: 0
From: SE WI
Voltage and lights fluctuating while idling

Hi all, first post, have spent the morning reading old threads to try and find some answers, but to no avail.

The vehicle is a 1994 E-150, 302, and the issue is a fluctuation in voltage while idling, the lights and volt gauge will ebb from dim to bright, not as fast as a blinker though. I'm wondering if this could have caused the failure of my fuel pump.

Another issue, although some of this mornings reading on this site helped, the fuel pump seems to have died.

The fuel pump relay, fuses check out, as do the voltage readings, the fuel pump connector near the tank also seemed to check out when the wife turned the ignition on/start, the meter zeroed out for a second, so I'm fairly confident the pump is gone. It seemed to die a slow death too.

Thanks.


_________
'01 F250SD 5.4
'94 E150 for the family
'88 E150 for firewood hauler, til a tree crushed it, still drives though.
 
Reply
Old Nov 24, 2007 | 02:04 PM
  #2  
kell104's Avatar
kell104
Elder User
Joined: Mar 2004
Posts: 580
Likes: 0
From: Chippewa Falls, WI
I would have your alternator tested. It may have a bad voltage regulator. Most parts stores will do it for free or very little cost.
 
Reply
Old Nov 24, 2007 | 07:36 PM
  #3  
wdchuck's Avatar
wdchuck
Thread Starter
|
New User
Joined: Nov 2007
Posts: 11
Likes: 0
From: SE WI
Took the alternator in and it was in need of replacement, so that's done, picked up a belt and the fuel pump while I was there. I wonder if I'd attended to the alternator sooner if the fuel pump would still be okay...
Will drop the tank in the am and take care of the pump.

Thanks.
 
Reply
Old Nov 25, 2007 | 03:13 AM
  #4  
kell104's Avatar
kell104
Elder User
Joined: Mar 2004
Posts: 580
Likes: 0
From: Chippewa Falls, WI
I guess it isn't out of the realm of possibility that the voltage problems overheated the pump somehow, but I have never heard of it personally. It was probably just it's time to go to the great tank in the sky.
Glad you figured out the voltage problems.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mcerchio
6.0L Power Stroke Diesel
14
Jun 4, 2013 08:55 PM
mcerchio
1999 - 2016 Super Duty
1
Nov 20, 2012 01:54 PM
JBronco
1978 - 1996 Big Bronco
5
Oct 1, 2004 04:03 PM
XLTDAWG
1983 - 2012 Ranger & B-Series
5
Aug 9, 2004 12:02 AM
tommyzax
1999 - 2016 Super Duty
3
Jun 17, 2003 01:44 PM




All times are GMT -5. The time now is 11:47 PM.

story-0
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-05-30 18:33:59


VIEW MORE
story-1
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-2
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-3
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-4
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-5
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-6
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-7
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-8
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE
story-9
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Slideshow: Everything You Need to Know about the 2027 Super Duty Carhartt Package!

By Michael S. Palmer | 2026-05-07 17:51:06


VIEW MORE