7.3 acting up - 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 04-17-2012, 09:15 PM
Member
 

Join Date: Apr 2012
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
7.3 acting up

I bought a 2000 f450 with a 7.3 all stock in it. I got a steal I think on it but yet to be seen. It was idling a little rough and sputtering in the lower gears and lacked lowend power all together just mashing the gas in neatrul it didnt want to rev over 2000. When driving it would lack power up to 2000 rpm then spudder a bit then it would act like the turbo spooled up and pull like it should the higher the road speed and gear the better it would do. There are no warning lights on and the guy I got it from knew nothing about nothing other then the dealership told him they thought it just needed a new computer that it wasent throwing any codes. Oh yea there was white smoke blowing when you get into it. So I checked the oil for any water oil looked very good no signs of water. Then I felt the intake side of the turbo and it felt good. So I unpluged the map sensor and ofcoarse the check engine light is on but the truck is running 10x better Im not saying its fixed just much better same symtoms but much lighter truck is reving much better and power is alot closer to where I think it should be. My question is where to go from here. This is my first 7.3 I also have a 01 3500 dodge that has never gave a problem and to this point puts this 7.3 to shame atleast on the lowend. The 7.3 acts like its being lugged when I think it should be pulling 1500-2000. Help me figure this out. Oh yea its not starting as easy as i think it should either. Thanks.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 04-18-2012, 06:41 AM
Member
 

Join Date: Apr 2012
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Update just got it off the scanner. Said #3 and #4 injector was bad and the map sensor was bad. He wanted 2500 to fix that seems real high to me. I will be taking it on myself. Where is the best place to get quailty injectors at a good price? Wouldnt a bad harness throw these codes as well?

Last edited by riley1131; 04-18-2012 at 06:47 AM.
Reply With Quote Quick reply to this message
  #3  
Old 04-18-2012, 07:13 AM
Compression Ignition Addict
 

Join Date: Jul 2010
Location: Falls Chruch
Posts: 463
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
replace the map sensor and the vacuum line first, then see how the truck runs.

I'm always very speculative of anyone who says inj #3 or #8 is bad. Its 100% normal for those injectors to throw codes, and expected. Need to know what the contribution percentages are to really determine if its a bad injector, and even then, its not completely accurate.

#4 is curious though.

Remove the valve covers and start the truck. Check to make sure the harness hasnt popped off the injector. Check if #3 and #4 are squirting oil while running.
Reply With Quote Quick reply to this message
  #4  
Old 04-18-2012, 07:44 AM
Member
 

Join Date: Apr 2012
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
I was thinking the same thing on the map sensor and how do i check the if the injectors are squirting may be a dumb question but this is my first experience with injectors.Just replaced map sensor didnt fix it.

Last edited by riley1131; 04-18-2012 at 08:55 AM.
Reply With Quote Quick reply to this message
  #5  
Old 04-18-2012, 07:49 AM
Compression Ignition Addict
 

Join Date: Jul 2010
Location: Falls Chruch
Posts: 463
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
You'll need to remove the valve covers. Not a fun job at all. Once removed, you can start the truck and watch the mechanical action of the injector. There will be a small squirt of oil shooting out of each injector clearly visible. Check to see if #3 and #4 have the oil shooting out. Basically compare the injectors and see if they all look the same. Pay special attention to the harnesses and clips. Make sure they are all attached properly.

Its free.

If you find the injectors are not squirting, leave the covers off and locate some replacements.
Reply With Quote Quick reply to this message
  #6  
Old 04-18-2012, 10:24 AM
Member
 

Join Date: Apr 2012
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
ok gooddeal ive bought everything but the injectors should I go ahead replace all the orings? And should I just start with the #4 side before removing both valve covers being that you said #3 frequently throws a bad code?
Reply With Quote Quick reply to this message
  #7  
Old 04-18-2012, 11:47 AM
Member
 

Join Date: Apr 2012
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Ok I got the valve cover off not really seeing the oil. But I did unplug the #4 injector and it didnt effect the way it ran. So should I replace the uvc wiring harness before removing the injector to just elminate the wiring? I already have the new gasket and harness.
Reply With Quote Quick reply to this message
  #8  
Old 04-18-2012, 11:56 AM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Dover
Posts: 1,618
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Check where the harness connects to the bulkhead (valve cover gasket) and make sure it is secure. It can also burn the pins inside so inspect those also. If all is good, i would say that injector is bad.
Reply With Quote Quick reply to this message
  #9  
Old 04-18-2012, 12:49 PM
Member
 

Join Date: Apr 2012
Posts: 60
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Ok just replaced the uvc harness looked at the main plug looks ok to me so it must be the injector. Im gonna run and get one that should make a noticable difference right? even if I have #3 bad as well. Should I go ahead and replace the orings on all the injectors on the side I already have apart? Im working on getting the drains out of the head mine apear to be star type not allen im going to try to find something I have them but none seem to fit exactly right. If for some reason I cant get these out what are my options? Do I need to take the plug out of the back of the head and drain the fuel out before I take the injector out?

Last edited by riley1131; 04-18-2012 at 01:15 PM.
Reply With Quote Quick reply to this message
  #10  
Old 04-18-2012, 01:39 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Dover
Posts: 1,618
Thanks: 1
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Well i would nornally say yeah change the orings on the others but I dont know what kind of timeline your on. Seems you may be a little rushed.
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 06:14 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