02' F450 7.3 - 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 12-12-2011, 01:16 AM
Powerstroke.org Rookie
 

Join Date: Dec 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
02' F450 7.3

Hey i've got a 2002 F450 7.3, lately i've noticed a huge drop in mpg, I was getting 14-15 which I always thought was great and has now dropped over the last couple weeks 9-11
The only noticeable sign of it not running perfect would be sometimes the truck seems real rough on the highway or when going from a stop, used to be really smooth and powerful but now it feels like i'm on a bumpy road if that makes any sense.
Also the truck has 180k miles on it.

So far i've checked the basics, air filter, fuel filter, oil change I keep up every 5k. I took it to my mechanic and he asked me the year make model miles and instantly told me my injectors were going out without even looking at the truck.

With it riding rough from start what would be the next place to check or should I go ahead and start looking to buy injectors and not waste anymore time?

Thanks for the help
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 12-12-2011, 04:06 AM
Member
 

Join Date: Sep 2011
Location: Near Iowa
Posts: 53
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Could be any number of things from the cps sensor to a leak some where
Reply With Quote Quick reply to this message
  #3  
Old 12-12-2011, 04:33 AM
Compression Ignition Addict
 

Join Date: Feb 2009
Location: Nacogdoches, TX
Posts: 11,008
Thanks: 0
Thanked 9 Times in 9 Posts
Feedback Score: 0 reviews
He wouldn't be my mechanic any longer, that's for sure.
Could be a cam pos sensor (CPS.) The UVCHs could be coming loose.
Do some quick searches on those and you'll find what to check.
After that you need to get it scanned for problems unless you wanna keep guessing.
Reply With Quote Quick reply to this message
  #4  
Old 12-12-2011, 06:47 AM
Winning DUHHH


 

Join Date: Sep 2010
Location: Sunrise Beach, MO
Posts: 2,149
Thanks: 0
Thanked 5 Times in 5 Posts
Feedback Score: 0 reviews
Winter blend fuel is probably the culprit! Combined with something else
Reply With Quote Quick reply to this message
  #5  
Old 12-12-2011, 09:41 AM
Powerstroke.org Rookie
 

Join Date: Dec 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
scanned

Does getting it scanned help even if i'm getting no engine lights?

Also pretty much any mechanic can do this right? or would I be better off going to the dealership.

The truck has had NO stalling out or sputtering or anything like that it seems to drive fairly good other than a rough idle or just overall rough driving and the gas mileage dropping to crap. I do drive easy on it too

I looked up the CPS and that looks like a really cheap easy test as its only like 25 bucks to fix myself so i'll go ahead and replace that even though the symptoms of a CPS arent really matching my problem and take it to get the scan done after that
Reply With Quote Quick reply to this message
  #6  
Old 12-12-2011, 09:42 AM
Powerstroke.org Rookie
 

Join Date: Dec 2011
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
fuel

Oh also wanted to mention i dont think its anything to do with the cold as its been going on for about 3-4 weeks and i'm down here in Houston Tx. 3 weeks ago it was actually pretty warm, it has chilled up in the last week or two but started before that.
Reply With Quote Quick reply to this message
  #7  
Old 12-16-2011, 03:36 PM
Member
 

Join Date: Sep 2011
Location: Near Iowa
Posts: 53
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
[/B]
Quote:
Originally Posted by cclucky04 View Post
Does getting it scanned help even if i'm getting no engine lights?

Also pretty much any mechanic can do this right? or would I be better off going to the dealership. May need to take it to a dealer

The truck has had NO stalling out or sputtering or anything like that it seems to drive fairly good other than a rough idle or just overall rough driving and the gas mileage dropping to crap. I do drive easy on it too

I looked up the CPS and that looks like a really cheap easy test as its only like 25 bucks to fix myself so i'll go ahead and replace that even though the symptoms of a CPS arent really matching my problem and take it to get the scan done after that
Could try unplugging the ICP sensor to see if it runs better if it does that could be your problem
take a look at the red txt
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 04:18 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