stuttering/rough idle - frustrated - Ford Powerstroke Diesel Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 16 Old 09-28-2009, 10:02 AM Thread Starter
Member
 
philhyde's Avatar
 
Join Date: Aug 2009
Location: Houston, TX
Posts: 87
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Question stuttering/rough idle - frustrated

My 2006 6.0L w/78K miles has lately been plagued with an intermittent rough idle situation. The problems I am experiencing are rough idle, stuttering off-idle, very limited power and extended upshifts.

I can't seem to put my finger on the triggers, but I would swear it was temperature related. I know it sounds silly, but it's really the only thing that has changed. Overnight temps were in the 60's last week, and that's when I started having problems.

I seemed to notice the problem after driving short distances, stopping and then starting again, before the engine fully warmed up.

After more "intense" driving (highway) the problem seems to go away.

One other thing I should mention - the last tank of fuel was 100% biodiesel. The idling problem seemed to be the absolute worst when I was very low on fuel (Saturday). In fact, the low fuel light was on. I filled the tank up (diesel), and still had the idling issue. After a quick bolt down the highway, no more rough running.

Now, I'm no stranger to fueling issues with biodiesel. If my problem weren't so intermittent, I would suspect fuel filters. However, they were both replaced at the beginning on this month.

Over the weekend, temps warmed up (90's yesterday), and this morning, I did not notice anything except a slight rough idle.

I was planning to get the truck into the shop today, but I held off because I didn't want to waste time with a "cannot reproduce" situation.

History: this truck received a new turbo last month. I towed a 4000lb trailer about 3000 miles earlier this month. Performed flawlessly, but toward the end of the trip, I noticed a faint coolant smell. I have since replaced the coolant reservoir cap and haven't really noticed it. Coolant level is at MIN, and I have not tried to find traces of dried coolant anywhere.

Also, I have been running custom SCT tunes from Innovative Diesel. I was running the street tune, which I removed on Friday. This did not seem to make a difference, nor did applying the tune (weeks ago) coincide with the problems appearing.

Thanks in advance for any tips.

2006 F250 Crew Cab Lariat 4x4 6.0
philhyde is offline  
post #2 of 16 Old 09-28-2009, 05:23 PM
Compression Ignition Addict
 
Join Date: Jun 2007
Location: Albuquerque
Posts: 597
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 2 reviews
Send a message via Yahoo to chuckles
can you monitor sensors/pids??

Chuckles

07 F350 King Ranch. SCT by Innovative!! 4" Magnaflow Turboback, Coolant Fiter System, ARP Studs, Sneaky Pipe by Elite Diesel.
chuckles is offline  
post #3 of 16 Old 09-28-2009, 05:30 PM
If it aint a CAT itsa DOG

 
dieseldan2005's Avatar
 
Join Date: Apr 2007
Location: North Branch, MN
Posts: 4,553
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
It sounds like a dirty egr valve.

Diesel Dan

10,000 LAKES CHAPTER MEMBER


2003 F350 Crew cab long box, FX4, 6.0, torqshift, Lariat.
dieseldan2005 is offline  
post #4 of 16 Old 10-01-2009, 04:06 PM Thread Starter
Member
 
philhyde's Avatar
 
Join Date: Aug 2009
Location: Houston, TX
Posts: 87
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Well today the dealer replaced the FICM. Some final testing tomorrow, but it appears to have done the trick.

The symptoms they troubleshot on the scanner or computer (or whatever they used) were dropping of #1 and #2 cylinders. They were thinking bad injectors, but then the engine started misfiring on other cyls.

2006 F250 Crew Cab Lariat 4x4 6.0
philhyde is offline  
post #5 of 16 Old 10-01-2009, 04:08 PM
If it aint a CAT itsa DOG

 
dieseldan2005's Avatar
 
Join Date: Apr 2007
Location: North Branch, MN
Posts: 4,553
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
I forgot about the FICM. Hopefully that did the trick for ya.

Diesel Dan

10,000 LAKES CHAPTER MEMBER


2003 F350 Crew cab long box, FX4, 6.0, torqshift, Lariat.
dieseldan2005 is offline  
post #6 of 16 Old 10-02-2009, 06:56 AM Thread Starter
Member
 
philhyde's Avatar
 
Join Date: Aug 2009
Location: Houston, TX
Posts: 87
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Plot thickens today. After FICM replacement, still showing 2 bad injectors. So they are replacing those.

What concerns me is that yesterday the tests were showing other injectors were bad as well.

I'm not feeling as confident about the repairs, but what can I do. Time will tell, I suppose.

2006 F250 Crew Cab Lariat 4x4 6.0
philhyde is offline  
post #7 of 16 Old 10-02-2009, 03:04 PM Thread Starter
Member
 
philhyde's Avatar
 
Join Date: Aug 2009
Location: Houston, TX
Posts: 87
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
More news...

After replacing #1 and #2 injector and FICM, engine is dropping an injector on the other side of the engine. Will have to wait until next week for the repairs. At least it's all under warranty, but I'm kinda wondering why the injectors are all failing.

2006 F250 Crew Cab Lariat 4x4 6.0
philhyde is offline  
post #8 of 16 Old 10-02-2009, 07:05 PM
If it aint a CAT itsa DOG

 
dieseldan2005's Avatar
 
Join Date: Apr 2007
Location: North Branch, MN
Posts: 4,553
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 2 Times in 2 Posts
Feedback Score: 0 reviews
That is weird. I have heard of a couple of guys that have had the same issues, but its not that common. I wonder if they can tell when they pull them what happened to them.

Diesel Dan

10,000 LAKES CHAPTER MEMBER


2003 F350 Crew cab long box, FX4, 6.0, torqshift, Lariat.
dieseldan2005 is offline  
post #9 of 16 Old 10-02-2009, 09:02 PM
Compression Ignition Addict
 
STORMTROOPIN's Avatar
 
Join Date: Mar 2009
Location: Norfolk Va
Posts: 156
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
just a thought but take a good luck over your wiring harness and those stubborn *** conectors on the ficm. Check to make sure that theres no corrosion or bent pins.

04' F350 PSD
4" Superlift
35" Nito Teragraplers
16" Eagle racing wheels
Home built 5" Side exit exhaust
RCD full egr delete
STORMTROOPIN is offline  
post #10 of 16 Old 10-03-2009, 08:58 AM Thread Starter
Member
 
philhyde's Avatar
 
Join Date: Aug 2009
Location: Houston, TX
Posts: 87
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
Wouldn't the dealer scanner/computer be reading low pressure, if the condition existed?

2006 F250 Crew Cab Lariat 4x4 6.0
philhyde 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