Is this weird...or normal? - Ford Powerstroke Diesel Forum

 
LinkBack Thread Tools Display Modes
post #1 of 4 Old 12-19-2012, 03:51 PM Thread Starter
Premium Member
 
Asapatrick's Avatar
 
Join Date: Oct 2012
Location: Scappoose, OR
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Is this weird...or normal?

Hello,
I have a 1997 4x4 CrewCab, auto trans, 270K miles....had it for about two months.

This last weekend I noteiced something I had not before while going down a long grade....5-6 miles, coasting most of the way. It was icy conditions and 22 degrees. When I would reapply the throttle, there would be this kind of resistence, felt sort of like a compression brake that would slow the truck down until I pushed far enough on the throttle to begin to rev the engine again. I sensed it was happening when the torque converter was trying to re-engage. I do not know the history of the truck....is that behavior normal, is it possible the way an aftermarket torque converter works....or is mine about to blow? Btw....otherwise it seems to shift perfectly.

Thanks in advance,

Shannon Flanagan
Asapatrick is offline  
post #2 of 4 Old 12-20-2012, 04:06 PM
Compression Ignition Addict
 
Diesel_brad's Avatar
 
Join Date: Dec 2008
Location: Gilbert PA
Posts: 2,400
Thanks: 9
Thanked 32 Times in 31 Posts
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
Feedback Score: 0 reviews
Could of been the Exhaust Back pressure Valve was closes. And until you build enough boost it will stay closed. I kinda acts like and exhaust brake when it is closed

Looking for Blue 40-20-40 seats. PM me !!!!!!!
Diesel_brad is offline  
post #3 of 4 Old 12-21-2012, 10:55 AM Thread Starter
Premium Member
 
Asapatrick's Avatar
 
Join Date: Oct 2012
Location: Scappoose, OR
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Thanks

Thanks Brad for responding. Does that mean the "exhuast back pressure valve" is malfunctioning, or that some other issue is at play...like a turbo that doesn't boost enough?

Shannon
Asapatrick is offline  
post #4 of 4 Old 12-21-2012, 02:01 PM
Serving Our Country!
 
JSchuricht's Avatar
 
Join Date: Aug 2007
Location: Manor, TX
Posts: 2,969
Thanks: 0
Thanked 25 Times in 24 Posts
Mentioned: 1 Post(s)
Quoted: 0 Post(s)
Feedback Score: 2 reviews
There's a bunch of unknown's there. 22° is cold enough for the valve to close but it should be open if your up to temperature. In the factory configuration it only closes to help with warmup. Is your thermostat working and do you have any aftermarket programming? Also look under the hood to see if there is any extra wires running to the valve, many people like to put it on a switch to use it as a exhaust brake.

JSchuricht is offline  
Reply

Tags
exhuast brake , torque converter , torque converter shudder , tranny problems

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