'1999 F250 Super Duty with 7.3L turbo diesel - Diesel Forum - TheDieselStop.com
1999-2007 General Questions General questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 12-05-2018, 01:39 PM Thread Starter
Junior Member
 
Join Date: Dec 2018
Posts: 1
My Photos: (0)
Feedback Score: 0 reviews
'1999 F250 Super Duty with 7.3L turbo diesel

If I mash the throttel a little I go if iam if I mash the throttel past the sweet spot I lose speed don't know if it is my throttel position sensor or my transmission
Rene Anthony Garcia is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 12-14-2018, 12:04 AM
Lifetime Supporting Member
Lifetime Supporting Member
 
sd73man44's Avatar
 
Join Date: Apr 2011
Location: midwest, Tecumseh, MI, Standish Pond and River Raisin
Posts: 121
My Photos: (2)
Feedback Score: 0 reviews
My truck does the same, same problem.
The throttle pedal assembly has two switches. One is the throttle position and the other is a limit switch. The limit switch is not listed in the parts catalog therefore no part number exists for that switch. The throttle position switch is listed and available as a replacement part. Not knowing the defective part I tried a new position switch ($25) but it didn’t cure the problem. Turns out the other limit switch is available but only when purchased as a complete pedal assembly which is approximately $260.00 from a parts place like rock auto. Tier 1,2,3 suppliers so no part number ever shows in Ford parts book.
I tried spraying contact cleaner on the switch and it seems to help but only temporarily. The limit switch is nothing special Except instead of a spade connector it has a short pigtail wire and connector due to packaging restrictions. This information is just my take on the parts and what I have been told. I could have been misled by bad information but this is what I have learned. There is also a chance it’s some other thing causing the throttle hesitation.
I’ve been wrong before.

'99 7.3L SD F250 4X4 manual 6 speed - original.

"We got a lot of stupid politician's in this country" C.S.
sd73man44 is offline  
post #3 of 3 (permalink) Old 12-14-2018, 03:11 AM
Lifetime Supporting Member
 
klhansen's Avatar
 
Join Date: Jan 2003
Location: Eagle River, Alaska
Posts: 24,256
My Photos: (180)
Feedback Score: 0 reviews
Quote:
Originally Posted by sd73man44 View Post
My truck does the same, same problem.
The throttle pedal assembly has two switches. One is the throttle position and the other is a limit switch. The limit switch is not listed in the parts catalog therefore no part number exists for that switch. The throttle position switch is listed and available as a replacement part. Not knowing the defective part I tried a new position switch ($25) but it didnít cure the problem. Turns out the other limit switch is available but only when purchased as a complete pedal assembly which is approximately $260.00 from a parts place like rock auto. Tier 1,2,3 suppliers so no part number ever shows in Ford parts book.
I tried spraying contact cleaner on the switch and it seems to help but only temporarily. The limit switch is nothing special Except instead of a spade connector it has a short pigtail wire and connector due to packaging restrictions. This information is just my take on the parts and what I have been told. I could have been misled by bad information but this is what I have learned. There is also a chance itís some other thing causing the throttle hesitation.
Iíve been wrong before.
The limit switch you're referring to is the idle validation switch, and if it goes bad, the engine will only idle. It would not cause a hesitation at rpm's above idle.

First truck -- 1929 Model A Ford pickup, restored from ground up. Wish I still had it!
'99.5 F250 PSD Supercab LB 4x4, ZF-6 w/SB Con OFE, 3.73LS, Boost & pyro gauges, Swamps S175/146 injectors, DP 80 HP Econo PCM (classic version
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
), AIS,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
regulated return,
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
klhansen is offline  
Sponsored Links
Advertisement
 
Reply

  Diesel Forum - TheDieselStop.com > 1999-2007 Ford Super Duties > 1999-2007 General Questions

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Forum - TheDieselStop.com 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











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