Need help with truck/weird problem - Ford Powerstroke Diesel Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 4 Old 08-02-2012, 07:56 AM Thread Starter
Powerstroke.org Rookie
 
Join Date: Aug 2012
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Need help with truck/weird problem

I have a 96 F250 supercab 7.3L turbo diesel that has started to do some weird stuff. Yesterday when I left work I noticed that anytime I go 3/4 throttle or to the floor with the pedal the truck loses all power. Its like someone just turned the truck off. It stays running and doesnt actually shut off when it does this. The Wait To Start Engine light flashes and the RPM's drop to 1500 everytime it does this. Until you take your foot off the gas pedal it has no power. It's like its just idleing. Once you come off the pedal its back to normal. If you are in Neutral or park you can free rev it with no problems at all. If you take off and go to the floor it is fine until it shifts to 2nd and then it will do it as well. So I Ohmed out the TPS on the gas pedal and it appears to be alright. It wouldn't allow me to ohm it with the truck running though. The truck idles fine and runs fine throught the rest of the throttle travel. Just anywhere from right after 3/4 or to the floor it does it. I pulled my programmer off and put it back to stock and it still does this. The truck has 161,000 miles on it. The only thing I did yesterday out of the ordinary was I brake torqued it once goofing off out front of work. I stood on the gas for maybe 3 seconds and let off the brake and it layed a little patch of rubber for maybe 2 feet thats it. The other thing it decided to do on me this morning on my way to work was. Upon taking off from a stop sign I noticed the engine sounded loud and deep like I lost my muffler or something and I had thick *** gray and black smoke just pouring out the exhaust. I stopped and took off again and the engine went back to normal sounding and no more smoke. It drove fine the rest of my 40 mile trip to work other than you cant go to the floor with the throttle or you lose all power. Any help would be greatly appreciated as I am lost when it comes to diesels and turbos. This is my first diesel I have owned.
Steve1sam89 is offline  
post #2 of 4 Old 08-06-2012, 11:28 AM
BANNED by Kris
 
BigFuel's Avatar
 
Join Date: Oct 2011
Location: Pasadena, CA
Posts: 6,182
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Thanks: 51
Thanked 112 Times in 104 Posts
Feedback Score: 0 reviews
You apparently have stumped many people with this (including me, not that I'm anything but a regular Joe). Think I'd start by removing and cleaning the Exhaust Back Pressure Tube and sensor. Video on YouTube. It slowly fills with soot and can send bad signals to the PCM at higher engine demands.

+ Matt - Star Tiger +
-Bean's: 160/100 (FF Injectors), 2/ 6-POS chips (TW & Beans tunes), Overboost controller, E-Fuel
-BANKs: downpipe, full exhaust, gauges, test pipes, intercooler
-Irate: T-4 kit, IC pipes, 3" Irate Plenums, BASB Turbo
-Mag-Hytec trans. and pumpkin covers
-6637, CCV, IDM, 6.0 Fan, 49-Federal PCM swap, MAP line Mod
-370 Amp alt., 40k trans cooler, SRP1.1
-twin on-board air w/ 10 gal. tank

Re-pinning '97 Cali PCM to Federal
BigFuel is offline  
post #3 of 4 Old 09-03-2012, 11:18 PM
Powerstroke.org Rookie
 
Join Date: Mar 2011
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
my 95 f-250 had same problem once, replaced the CPS and all was good again.
llapinelog2 is offline  
post #4 of 4 Old 09-17-2012, 02:28 PM
Member
 
Join Date: Sep 2012
Posts: 37
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Sounds to me like your fuel pump is dying,mine did the same thing,it will work for a certain amount of pressure but after a point it was to weak to supply that much.When u change it just remember to pull it straight off,you dont want it to snap and drop in.
jeffygunt is offline  
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:
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