Speedometer off - Ford Powerstroke Diesel Forum

 
LinkBack Thread Tools Display Modes
post #1 of 7 Old 02-22-2012, 07:31 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Apr 2011
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Speedometer off

I have a 99 f250 7.3. the truck has smaller tires on it they are 70's instead of 75's. I got the superlift speed calibrator because it was 10mph to fast. I followed the instructions and put the speed calibrator on. after i installed it its been acurate untill about 40mph and then its 5 mph to slow and then as i increase my speed it even gets further out of wack 10mph to slow and so on. Does anyone know what is causing this?? Do i need a new instrument cluster? Speed sensor? something im missing here with the calibrator? Any help would be greatly appreciated!
stang0303 is offline  
post #2 of 7 Old 02-24-2012, 11:29 AM
Compression Ignition Addict
 
Freedombyforce's Avatar
 
Join Date: Jan 2011
Location: Dorcheat Bayou, Louisiana
Posts: 187
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
your gonna need more info than just 70 to 75. What size are the tires that are on it now? Did you buy the truck with big tires on it and then take them off?

2002 F-250 CCSB

ZF-6 Swap
Manual T-Case Swap
K&N Intake, CCV Dumped, Riff Raff Boots
Foil Delete, AIH Delete, EBPV Delete
Wicked Wheel
Farm Boy's 5" Straight Pipe with 6" tip
PHP's Tunes with 6 pos
Hutched 51 gal Titan Tank
Iron Bull Bumper with PIAA 510's and Strobes
Warn M12000, Retrosolutions LED's inside and out
2011 Tailgate -Taillights - Front Ford Emblem
17" Fuel Octanes with ProComp Extreme AT 35's




Freedombyforce is offline  
post #3 of 7 Old 02-24-2012, 01:55 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Apr 2011
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
yeah they are stock except the side wall height. I told me in the superlift manual to do 10 turns on the calibrator which i did but like i said it is true speed slower then 40 mph according to my gps and then the faster you go the more off it gets. It had these smaller tires when i bought it. the guy i bought it from lowered it in the back with 2" drop shackles and he said he liked the smaller tire look i guess. I bought some 20's for it and going to put them on but i guess he said they are the same height just more rim.
stang0303 is offline  
post #4 of 7 Old 03-06-2012, 06:55 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Apr 2011
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
no responses not sure what to do
stang0303 is offline  
post #5 of 7 Old 03-06-2012, 09:00 AM
Premium Member
 
Term3's Avatar
 
Join Date: Feb 2011
Location: Edmonton, Alberta Canada
Posts: 3,957
Thanks: 0
Thanked 34 Times in 32 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 1 reviews
Back when I had a lifted truck with big tires I took it to a local shop that had a drive on dyno and they ran it thru all the gears and from that they made a speed compensator to correct my odometer.

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
Term3 is offline  
post #6 of 7 Old 03-06-2012, 12:35 PM Thread Starter
Powerstroke.org Rookie
 
Join Date: Apr 2011
Posts: 21
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I bought 20 rims on it with 275/45/20 tires hopefully when i put them on in the spring i will take it to get calibrated. I bought the calibrator but it still isn't right i must be doing something wrong i installed it right. hmmm
stang0303 is offline  
post #7 of 7 Old 03-07-2012, 06:32 AM
Premium Member
 
Term3's Avatar
 
Join Date: Feb 2011
Location: Edmonton, Alberta Canada
Posts: 3,957
Thanks: 0
Thanked 34 Times in 32 Posts
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
Feedback Score: 1 reviews
Quote:
Originally Posted by stang0303 View Post
I bought 20 rims on it with 275/45/20 tires hopefully when i put them on in the spring i will take it to get calibrated. I bought the calibrator but it still isn't right i must be doing something wrong i installed it right. hmmm
Just do what I did as the place I went to builds a custom unit for EACH vehicle. Don't go to a place that just pulls a converter off the shelf and install it.

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
Term3 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome