Notices
1999 - 2003 7.3L Power Stroke Diesel  
Sponsored by:
Sponsored by: DP Tuner

Speedometer goes crazy

Thread Tools
 
Search this Thread
 
Old Oct 21, 2006 | 02:47 PM
  #1  
Lushman's Avatar
Lushman
Thread Starter
|
Elder User
Joined: Feb 2006
Posts: 560
Likes: 0
From: San Diego, CA
Speedometer goes crazy

I was driving on the freeway yesterday going 70 and I noticed the speedometer "ticking like a clock" kind of going down to 60 and then back to 70. It was very sporadic though and would do it for 10-15 seconds and then not do it for 5 minutes? Is this a sensor possibly or has anyone had this issue before? The truck was running fine.
Thanks
 
Reply
Old Oct 21, 2006 | 04:03 PM
  #2  
empiretc's Avatar
empiretc
Lead Driver
20 Year Member
Joined: Dec 2003
Posts: 5,250
Likes: 42
sounds like vss sensor. you can try cleaning it or get a new one. I got one for $15.
 
Reply
Old Oct 21, 2006 | 06:58 PM
  #3  
BuickTurbo's Avatar
BuickTurbo
Elder User
Joined: Aug 2005
Posts: 763
Likes: 0
From: Dallas, Texas
Anyone else notice the VSS and CPS are almost the same thing? Would'nt that suck if someone were to find out that they are interchangeable? I would show up at the Ford service desk with a whole bunch of questions.
 
Reply
Old Oct 21, 2006 | 07:01 PM
  #4  
Zip's Avatar
Zip
FTE Legend
20 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2006
Posts: 37,918
Likes: 178
From: Princeton, BC
Originally Posted by empiretc
sounds like vss sensor. you can try cleaning it or get a new one. I got one for $15.
Yep that's what it sounds like to me. At least that's what mine was doing then the spedo quit all together. I took mine out and wiped it off but ended up getting a new one.
 
Reply
Old Oct 21, 2006 | 07:14 PM
  #5  
Uzumati's Avatar
Uzumati
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
CPS = 3 wire
DSS = 2 wire (VSS- Ford calls it Differential speed sensor)
 
Reply
Old Oct 21, 2006 | 07:29 PM
  #6  
clintbonnie's Avatar
clintbonnie
Cargo Master
Joined: Jun 2003
Posts: 3,292
Likes: 6
From: Ardenvoir, Washington
Mine was quiting and starting and acting strange.. Got a napa P/N 530780, ABS sensor according to Napa, $10.49 and it fixed the problem... (top of the rear-end)
 
Reply
Old Oct 22, 2006 | 03:49 PM
  #7  
Lushman's Avatar
Lushman
Thread Starter
|
Elder User
Joined: Feb 2006
Posts: 560
Likes: 0
From: San Diego, CA
I just replaced that when I bought the truck in April? My ABS light was on all the time and that fixed it, but it could already be bad again? Is this part made in America or overseas!!
 
Reply
Old Oct 22, 2006 | 08:39 PM
  #8  
Brian0445's Avatar
Brian0445
Senior User
Joined: Nov 2004
Posts: 147
Likes: 0
From: Upstate NY
I have problems with my speedometer too, it seems to be on first start up and it wont move, shut truck down and restart and it seems to work fine. It only does it once or twice a month so I was not so worried. But do you think that this could be a vss sensor also? Oh is the VSS located on top of the rear end? I thought that that sensor was for the rear abs.
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

Top 10 Fords at 2026 Carlisle Ford Nationals

 Joe Kucinski
story-1

3 Best / 3 Worst Parts of Modern Ford Ownership

 Brett Foote
story-2

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

 Pouria Savadkouei
story-3

Every 2026 Ford Engine Explained

 Brett Foote
story-4

10 Ugly Ford Trucks That We Still Kinda Love

 Joe Kucinski
story-5

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-6

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-7

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-8

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote
story-9

Top 10 Ford Truck Tragedies

 Joe Kucinski
Old Oct 22, 2006 | 11:23 PM
  #9  
conkster's Avatar
conkster
Junior User
Joined: Mar 2006
Posts: 93
Likes: 2
From: Echo Oregon
Club FTE Silver Member

The sensor on the rear diff. is the rear ABS sensor. it provides input to several different systems ie: speedometer, ABS, and when bad makes OD light flash.
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
steve0195001
6.0L Power Stroke Diesel
10
Dec 9, 2010 02:57 AM
fixitman1310
1994.5 - 1997 7.3L Power Stroke Diesel
3
Feb 24, 2010 05:16 AM
Matthew Henson
2004 - 2008 F150
10
Mar 21, 2006 11:49 AM
tagunderson
Explorer, Sport Trac, Mountaineer & Aviator
2
Aug 8, 2004 09:43 PM
AdamH
1983 - 2012 Ranger & B-Series
6
Mar 28, 2002 10:23 PM




All times are GMT -5. The time now is 03:59 PM.

story-0
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-1
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-2
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-3
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-4
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-5
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-6
Rezvani's Latest Post-Apocalyptic 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 | 2026-06-03 11:38:36


VIEW MORE
story-7
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-8
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-9
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

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


VIEW MORE