What happens at 1750 RPM - Ford Powerstroke Diesel Forum
 
LinkBack Thread Tools Display Modes
post #1 of 10 Old 03-21-2010, 06:23 AM Thread Starter
Member
 
Join Date: Apr 2009
Location: Omaha, NE
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
What happens at 1750 RPM

I'm wondering if anyone else has noticed this.

As the engine revs up while going through each gear, everytime the truck hits about 1750 RPM, I feel a slight hesitation. Kinda reminds me what a car under a load feels like when you turn the A/C compressor on. Do our trucks have something that kicks "on" at about that RPM? It is very noticable and only under light acceleration. If I accelerate with a lot of throttle through that RPM, it isn't nearly as noticeable. But it definitely happens right about 1750...like clockwork.

I have a manual transmission so I know it isn't something there.

2010 F-250 SC XLT FX4, 6-speed manual
blackbirdxx is offline  
post #2 of 10 Old 03-21-2010, 06:35 AM
Powerstroke.org Fanatic
 
s8v4o's Avatar
 
Join Date: Oct 2007
Posts: 130
Thanks: 4
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Part throttle, WOT, all the time?
s8v4o is offline  
post #3 of 10 Old 03-21-2010, 06:37 AM Thread Starter
Member
 
Join Date: Apr 2009
Location: Omaha, NE
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by s8v4o View Post
Part throttle, WOT, all the time?
Pretty much any time I'm not using WOT. It might happen when I am at WOT but the engine revs past 1750 so fast that I don't really notice it.

2010 F-250 SC XLT FX4, 6-speed manual
blackbirdxx is offline  
post #4 of 10 Old 03-21-2010, 06:44 AM
Powerstroke.org Fanatic
 
my1stdiesel's Avatar
 
Join Date: Dec 2009
Posts: 114
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I have a manual transmission and I notice it too. That hesitation went away with tuning. Also my fourth gear seems to have more noise than the other gears, is yours the same?
my1stdiesel is offline  
post #5 of 10 Old 03-21-2010, 06:45 AM
Compression Ignition Addict
 
black99stroker's Avatar
 
Join Date: Mar 2008
Posts: 275
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Wondering about this as well. My truck does the exact same thing.

2010 f250
ext. cab long bed
4x4 6 speed
black99stroker is offline  
post #6 of 10 Old 03-21-2010, 06:51 AM Thread Starter
Member
 
Join Date: Apr 2009
Location: Omaha, NE
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by my1stdiesel View Post
I have a manual transmission and I notice it too. That hesitation went away with tuning.
I haven't tuned mine...

Quote:
Originally Posted by my1stdiesel View Post
Also my fourth gear seems to have more noise than the other gears, is yours the same?
I haven't noticed 4th gear sounding any different.

2010 F-250 SC XLT FX4, 6-speed manual
blackbirdxx is offline  
post #7 of 10 Old 12-12-2011, 10:25 PM Thread Starter
Member
 
Join Date: Apr 2009
Location: Omaha, NE
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Quote:
Originally Posted by black99stroker View Post
Wondering about this as well. My truck does the exact same thing.
Did you ever find out what this was? I still don't know what it is but it is definitely there still with 30k miles.

2010 F-250 SC XLT FX4, 6-speed manual
blackbirdxx is offline  
post #8 of 10 Old 12-23-2011, 03:28 PM
Powerstroke.org Rookie
 
Join Date: Feb 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Injection timing changes ... helps smooth shifting and "unloads" the transmission for longevity. Also hear more rattle at certain timing points compared to others. Just what I could conclude from watching the dashdaq ...
heliroto is offline  
post #9 of 10 Old 12-23-2011, 03:54 PM Thread Starter
Member
 
Join Date: Apr 2009
Location: Omaha, NE
Posts: 56
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Wish there was way to get rid of it. With a manual transmission, not sure why it would be there. It's frustrating. Definitely not smooth power delivery

2010 F-250 SC XLT FX4, 6-speed manual
blackbirdxx is offline  
post #10 of 10 Old 12-23-2011, 07:46 PM
Powerstroke.org Rookie
 
Join Date: Feb 2009
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Yeah you got me on the manual ... not to derail the topic but I know when trying to bring RPM up nice and easy in park/neutral it will do some strange non-linear accel/decel.
heliroto 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