speedo vs. trip computer - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
ยป Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Interior | Electrical | ECU
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 04-06-2003, 18:03   #1 (permalink)
nix_ELFairmont
Guest
 
Posts: n/a
speedo vs. trip computer

I recently noticed that the that my speed alert that is set at 120 goes off when the pin on the speedo is actually reading at about 127.

Also with cruise control set at 118 down the highway, reseting my average speed gave me an average speed of about 112.

Which one should i believe (if either)?
  Reply With Quote
Sponsored Links
Advertisement
 
Old 04-06-2003, 18:26   #2 (permalink)
I am a Turbo Wanker
 
YOOT's Avatar
 
Join Date: Jun 2002
Location: Brisbane
Age: 32
Posts: 2,379
Welcome to the Forums Nix!

Any one have any ideas?
__________________
256rwkw @ 1920kgs
YOOT is offline   Reply With Quote
Old 04-06-2003, 20:24   #3 (permalink)
do YOU have rubber?
 
!Gn|T|0n's Avatar
 
Join Date: Dec 2002
Location: Brisbane
Age: 34
Posts: 2,357
I wouldn't be concerned with the speed average too much; it is nothing more than an estimate despite the fact that if you reset it at a certain speed and maintain that speed, you'd expect it to average that speed. It may be a calibration problem. Unfortunately I can't really suggest how you go about rectifying this. The instrument cluster, body computer and trip computer / clock are all connected by a white striped black cable. The trip computer shares a separate connection to the body computer, a separate shielded connection to the instrument cluster and a separate earth. Perhaps check that the earth is ok (probably not your problem). Failing that, try getting the EEC checked for fault codes. Perhaps something like code 452 "Intermittent or missing speedo signal". If it is speedo related, you may notice a difference with your speed sensitive power steering ??? Have you asked Ford?
!Gn|T|0n is offline   Reply With Quote
Old 04-07-2003, 02:39   #4 (permalink)
DOA
Registered User
 
Join Date: Apr 2002
Location: Melbourne
Posts: 48
Wink

That is normal, as the speedo is designed to over read by about six kph at 100 kph, (at least that was the case in the E-series dash).

The trip computer works off the module pulses and computer and is more accurate. It will give a instant speed when reset
The VDO speed alert system works off the same sources as the trip computer.

Believe the trip computer and speed alert as its more accurate but drive off the speedo. It will allow a margin for speed cameras and radars that may just and has probably saved me a few times.

For those people with x police vehicles, be very carfull as the speedo is designed to underread. All these errors are there to ensure when you booked for speeding, your definitely speeding.

Source: retired VDO employee.
__________________
Ford Doctor. Who requires a transfusion?
DOA is offline   Reply With Quote
Old 04-07-2003, 15:11   #5 (permalink)
I am a Turbo Wanker
 
YOOT's Avatar
 
Join Date: Jun 2002
Location: Brisbane
Age: 32
Posts: 2,379
I'm going to have to try this in my ED!
__________________
256rwkw @ 1920kgs
YOOT is offline   Reply With Quote
Old 04-07-2003, 15:32   #6 (permalink)
do YOU have rubber?
 
!Gn|T|0n's Avatar
 
Join Date: Dec 2002
Location: Brisbane
Age: 34
Posts: 2,357
Guys, I'm getting a power run on the dyno tomorrow morning, can they easily do a speedo accuracy check for me at the same time? If so, how much do they typically charge for this?
!Gn|T|0n is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Interior | Electrical | ECU



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem with EL Trip computer russell Interior | Electrical | ECU 10 08-16-2002 03:14
How to wire up a trip computer to an ED? MightyEFGhia Interior | Electrical | ECU 3 08-12-2002 06:49
Trip Computer ebiisixa Interior | Electrical | ECU 3 08-10-2002 06:48
Trip computer wires,where do they go ? Falcon kid Interior | Electrical | ECU 2 06-26-2002 00:29
1988 EA Trip Computer Installation rdela Interior | Electrical | ECU 2 06-04-2002 02:01

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 21:03.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.