Buzzing when cold, using fuel - 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 12-03-2008, 01:45 PM
Powerstroke.org Rookie
 

Join Date: Dec 2008
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Buzzing when cold, using fuel

I seem to have all of my local fellow 7.3 owners stumped on this one. Here's the problem- When the temperature outside drops to around 32 F, there is a loud buzzing sound under the hood that I cant seem to pin down.

It makes no difference whether it is plugged in or not, and the buzzing doesnt start until I am about a mile down the road. It only happens between 1000 and 2000 RPM approx. if I shift to 5th gear at 35-40 MPH I drop to 1000 RPM and the sound stops. It will also stop if the clutch is depressed or if accelerating, but sound will resume when speed steadies. Also, once the engine is good and warm, (depending on temperature), or if the engine is shut off for a few minutes after initial warm-up, the sound will disappear

The biggest worry is that while it is buzzing, you can watch the fuel guage drop very quickly. Within a few minutes, a quarter of a tank of fuel will be gone. At 4.60 a gallon, this is a little expensive!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-03-2008, 03:25 PM
Compression Ignition Addict
 

Join Date: Nov 2008
Location: Raleigh, NC, Lumberton, NC
Posts: 157
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to nicho
Sounds like you have an issue with your fuel injectors. Is there what appears to be a small forest fire coming out of your tail pipe?
Reply With Quote Quick reply to this message
  #3  
Old 12-03-2008, 03:42 PM
Emergency Services
 

Join Date: May 2007
Location: Columbus, OH
Posts: 5,538
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to cchase
Quote:
Originally Posted by fyrevyrm View Post
I seem to have all of my local fellow 7.3 owners stumped on this one. Here's the problem- When the temperature outside drops to around 32 F, there is a loud buzzing sound under the hood that I cant seem to pin down.

It makes no difference whether it is plugged in or not, and the buzzing doesnt start until I am about a mile down the road. It only happens between 1000 and 2000 RPM approx. if I shift to 5th gear at 35-40 MPH I drop to 1000 RPM and the sound stops. It will also stop if the clutch is depressed or if accelerating, but sound will resume when speed steadies. Also, once the engine is good and warm, (depending on temperature), or if the engine is shut off for a few minutes after initial warm-up, the sound will disappear

The biggest worry is that while it is buzzing, you can watch the fuel guage drop very quickly. Within a few minutes, a quarter of a tank of fuel will be gone. At 4.60 a gallon, this is a little expensive!

First, Id like to let you know your getting ripped off, we are paying half of that for fuel now.

second. can you let the truck idle, and pinpoint this sound?
Reply With Quote Quick reply to this message
  #4  
Old 12-04-2008, 07:24 AM
Powerstroke.org Rookie
 

Join Date: Dec 2008
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Using the idle control, I ve set it to around 1500 where it seems to be at its worst, and still can t pinpoint where it coming from. No one else can seem to figure out where either, but it very loud inside cab, so I suspect it near firewall.

I haven t noticed any small fires, but to be honest, I haven t specifically looked either. It s cold here now, will look tomorrow.

This is the second winter it has done this, bought July 2007, haven t done a thing to it (knock on wood)
Reply With Quote Quick reply to this message
  #5  
Old 12-04-2008, 08:06 AM
Compression Ignition Addict
 

Join Date: Nov 2008
Location: Raleigh, NC, Lumberton, NC
Posts: 157
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Send a message via AIM to nicho
I would think you would see smoke if that much fuel went missing suddenly. I would check the filters and hoses, the FPR shraeder and assembly, and pray you find it.
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 05:57 AM.


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