Odd high pitch sound - Ford Powerstroke Diesel Forum
Please Visit our Site Sponsors
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools Display Modes
Old 07-02-2014, 07:44 AM
Powerstroke.org Rookie

Join Date: Nov 2011
Location: Winnemucca Nevada
Posts: 16
Thanks: 5
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Odd high pitch sound

My 97 Manual CCSB makes this crazy high pitch sound out of the exhaust when set on high idle or is cold. It gets super loud in the winter here in Nevada. Also when cold if we don't let it warm up for 20-30 mins. It is gutless and I can't keep RPMS up to get out of second gear? Is it the turbo? or is this common? I also have a 96 CCLB automatic that does it only during the winter and only did it after I straight piped it. I have never noticed this sound in any other OBS I've been around so its really bothering me.
Reply With Quote Quick reply to this message
Sponsored Links
Old 07-02-2014, 01:52 PM
Compression Ignition Addict

Join Date: Feb 2014
Posts: 266
Thanks: 0
Thanked 8 Times in 8 Posts
Feedback Score: 0 reviews
Sounds like your exhaust backpressure valve is not opening properly.

That could either be the valve failing, or an engine temp sensor not reading properly. Grab a scan tool or bluetooth OBD2 adapter, make sure the EOT (Engine Oil Temperature) is rising sanely. There's no coolant temp input to the ECU, so don't be surprised when it reads -40.

If the ECU is properly reading the engine temp, then go poking at the valve & see if it's stuck.
Reply With Quote Quick reply to this message
The Following User Says Thank You to Syonyk For This Useful Post:
L84HNTN (07-08-2014)
Sponsored Links

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
What state or province do you live in?
Security Question
*Required, this field is not shown to others. Enter the last two characters of the word "Powerstroke"
Security Question #2
*Required, this field is not shown to others. "While balancing on a piece of wood, two inches by four inches known as a 2x4, john and his friend sally both spotted a dalmatian inside a truck with sirens, headed to put out a fire. State the animal mentioned in the sentence above."
Please select your insurance company (Optional)


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 04:00 PM.

Powered by vBulletin® Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.