RPM stuff - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 08-17-2012, 02:23 PM
Member
 

Join Date: Aug 2011
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
RPM stuff

Hello,

I just drove home from work and noticed 2 strange things:

* I was driving 58mph, which is about 1950 rpm and after a while it changed to 2000 rpm while the speed stayed the same.
* I slowed down on the exit lane and could hear the engine slow down, but the gauge stayed at 2000 and suddenly dropped to 1500 or so.

What could cause this? Some kind of sensor?

Another question while we're at it: at which rpm should the 4R100 switch gears when pushing the pedal halfway? Mine stays in the same gear until 2500-2800 rpm depending on the gear. Is that normal? Isn't that a high rpm? It does get its maximum torque at 1500, so why shifting so late then??


Thanks for all info (again!),
Mark

Last edited by Mark_be; 08-19-2012 at 02:03 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 08-17-2012, 03:04 PM
Compression Ignition Addict
 

Join Date: Jul 2012
Location: Ventura, CA
Posts: 180
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
What truck do you have? Year, engine etc. You said E40D but the 7.3 doesnt have an E40D, it has the 4R100 (automatic).
Reply With Quote Quick reply to this message
  #3  
Old 08-17-2012, 03:09 PM
Member
 

Join Date: Aug 2011
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Sorry, you're right, It's the 4R100. I have a 2001 7.3 PSD.
Reply With Quote Quick reply to this message
  #4  
Old 08-19-2012, 02:05 PM
Member
 

Join Date: Aug 2011
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
(corrected my error about transmission type in original post)
Reply With Quote Quick reply to this message
  #5  
Old 08-27-2012, 10:09 AM
Member
 

Join Date: Aug 2011
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Update: Seems like the gage itself is sticking, because when I give it a knock on the front, the arrow goes back to the normal position. The only thing that keeps bothering me is why it first goes to 2000 rpm to get stuck.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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
Display Modes

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



All times are GMT -8. The time now is 08:29 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors