Reduced Engine Power HEADACHE
Thread Starter
|
New User
Joined: Jul 2012
Posts: 3
Likes: 0
Reduced Engine Power HEADACHE
I've got an 08 350 6.4 and have been having alot of issues lately. I started losing power periodically about a month ago while driving. The truck would act like it was stalling and then wouldn't allow me to go over 40mph. Ford dealer suggested that I change the fuel filters, air filter, and put new batteries in - all of which I did.
Now I've got a digital readout saying Reduced Engine Power nearly everyday - I pull a 10K trailer/bobcat daily. I've had it in the dealership 4 times now and have racked up over a grand in knick knack parts and labor trying to fix the issue. They've had it hooked up to the computer several times trying to diagnose the problem. I keep getting it back and the same issues come back. I've replaced all the sensors in the exhaust etc.
Could I have a thermostat problem? I'm lost and need power.
Thanks in advance, fellas.
Now I've got a digital readout saying Reduced Engine Power nearly everyday - I pull a 10K trailer/bobcat daily. I've had it in the dealership 4 times now and have racked up over a grand in knick knack parts and labor trying to fix the issue. They've had it hooked up to the computer several times trying to diagnose the problem. I keep getting it back and the same issues come back. I've replaced all the sensors in the exhaust etc.
Could I have a thermostat problem? I'm lost and need power.
Thanks in advance, fellas.
Super Moderator
Joined: Aug 2008
Posts: 37,384
Likes: 1,868
From: Frederick, MD
What are the codes...what does your paperwork indicate?
Reduced power usually means it is a powertrain component that the PCM is trying to protect.
So we need the code.
So you have fresh fuel filters and your oil has been changed. What about your coolant. What is the level and are you eating any?
Are you making oil? What is the cold level of that?
Tail pipes...are they clean/grayish or are they black?
Are you running a tuner or all stock?
Reduced power usually means it is a powertrain component that the PCM is trying to protect.
So we need the code.
So you have fresh fuel filters and your oil has been changed. What about your coolant. What is the level and are you eating any?
Are you making oil? What is the cold level of that?
Tail pipes...are they clean/grayish or are they black?
Are you running a tuner or all stock?
Posting Guru
Joined: Sep 2010
Posts: 2,213
Likes: 1
From: The Woodlands, TX
I second that... There's absolutely no reason to be guessing the problem when your truck is in "Limp" mode. There are specific codes that tell you what's wrong.
Thread Starter
|
New User
Joined: Jul 2012
Posts: 3
Likes: 0
I appreciate the response. I've been a Ford guy my entire life - this is my first diesel, so my knowledge isn't very great yet.
The truck is stock. I haven't done anything to it as far as tuning or hacking the exhaust off.
The last receipt from the dealer shows that KOEO P0088 Fuel Rail Pressure was high. They ran a pin point test and followed TSB 12-7-7 and reprogrammed PCM to 79.05. Test drove and cleared code.
I called the service manager as soon as the wrench reappeared the next day - he said to check the coolant. The coolant level was fine. He now thinks that I have a thermostat issue and that it's 'sticking' and not releasing causing the engine to reduce power in order to save from blowing something up.
My regens are very few and far between. I bet I haven't had the cleaning exhaust in a couple weeks. When I do get it, it's a 10-12 second burst of thick white exhaust. No regen leads me to believe that I have exhaust issues - but then again, I'm new to all of this code stuff.
The truck is stock. I haven't done anything to it as far as tuning or hacking the exhaust off.
The last receipt from the dealer shows that KOEO P0088 Fuel Rail Pressure was high. They ran a pin point test and followed TSB 12-7-7 and reprogrammed PCM to 79.05. Test drove and cleared code.
I called the service manager as soon as the wrench reappeared the next day - he said to check the coolant. The coolant level was fine. He now thinks that I have a thermostat issue and that it's 'sticking' and not releasing causing the engine to reduce power in order to save from blowing something up.
My regens are very few and far between. I bet I haven't had the cleaning exhaust in a couple weeks. When I do get it, it's a 10-12 second burst of thick white exhaust. No regen leads me to believe that I have exhaust issues - but then again, I'm new to all of this code stuff.
Posting Guru
Joined: Sep 2010
Posts: 2,213
Likes: 1
From: The Woodlands, TX
The white smoke is most likely one of two things: Coolant being burned or moisture in your charge air cooler. Not necessarily Regen related
You also have to remember that the "Cleaning Exhaust" message only shows for a few seconds upon Regen start. You have to go through the message center to initiate a system check to see if Regen is complete.
You also have to remember that the "Cleaning Exhaust" message only shows for a few seconds upon Regen start. You have to go through the message center to initiate a system check to see if Regen is complete.
Cargo Master
Joined: Jan 2006
Posts: 3,012
Likes: 90
From: SE. MA
Trending Topics
Super Moderator
Joined: Aug 2008
Posts: 37,384
Likes: 1,868
From: Frederick, MD
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Posting Guru
Joined: Jul 2008
Posts: 1,057
Likes: 0
From: Florida
You definately need a different dealer. Did you change the fuel filters or did the dealer do it? Was there any sludge or build up on the filter? I got a tank of contaminated fuel and had a power reducing problem in one of my 08's that was caused by a clogged fuel filter.Had to drop the tank and flush it. Just a guess.
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Unfortunately Scott is likely right about this one. Neither the VCV or PCV are serviceable parts, the HPFP needs to be replaced if the reflash doesn't fix this concern.
If that code is present a new HPFP is likely in your future.
If that code is present a new HPFP is likely in your future.
Thread
Thread Starter
Forum
Replies
Last Post
sbxworship
1994.5 - 1997 7.3L Power Stroke Diesel
16
Nov 30, 2011 03:34 PM
Reave1
6.0L Power Stroke Diesel
42
Feb 13, 2008 08:46 PM
grounder
1999 - 2003 7.3L Power Stroke Diesel
5
May 30, 2001 12:00 PM