6.0L Misfire..
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Freshman User
Joined: Aug 2010
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From: Palmdale, Ca
6.0L Misfire..
Okay, here's the problem. 2003 Ford F350 with a 6.0 L diesel. The problem I will be describing only happens when the outdoor temperatures reach above 80°. When it is cold out it runs fine. Also the problem only happens at one given RPM which is about 2100. If you increase the RPM the problem is nonexistent and if you decrease the RPM the problem is nonexistent. It also only seems to happen when towing the trailer which is around 13,000 pounds. The truck is all stock except for a Banks exhaust system and a ram air intake.
This is what it does. At 2100 RPM it seems to misfire and Buck a little. I see no change on the tack at all and no check engine codes. I have changed the mass air sensor and the problem still exist. I was thinking it could be the FICM but the symptoms don't seem to match up. The truck has 35,000 miles on it. Any ideas where to chase this ghost problem down. I must say, I am a little stumped on this one.
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This is what it does. At 2100 RPM it seems to misfire and Buck a little. I see no change on the tack at all and no check engine codes. I have changed the mass air sensor and the problem still exist. I was thinking it could be the FICM but the symptoms don't seem to match up. The truck has 35,000 miles on it. Any ideas where to chase this ghost problem down. I must say, I am a little stumped on this one.
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Joined: May 2012
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From: Decatur
It's not a tranny problem is it? From the way it sounds it could be your tranny try to shift gears but isn't. That's the only thing I could think of with it being at that rpm. And with the tach not jumping when it happens it seems like it might not be the engine. But that's just what it seems to me with my limited knowledge. Does it do the same thing if you rev it while in neutral or is it just when driving?
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Freshman User
Joined: Aug 2010
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From: Palmdale, Ca
I bought it new and really only use it for the fifth wheel. The problem only happens when it is hot out. I always have run synthetic oil all its life at 5000 or less miles per oil change. It also has a FS2500 on it just installed after 10.000 miles. Coolant was done at 32.000 to make sure there was no crap in the system and transmission has been serviced twice in its 35.000 miles. Once because I installed a Magtech pan on it. I also serviced the EGR valve last year and plan on doing the turbo clean soon. In fact this truck has been taken very good care of.
Other then the ford reflashes and one injector problem when it was new. The truck has been good except for this ghost problem now...
Other then the ford reflashes and one injector problem when it was new. The truck has been good except for this ghost problem now...
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Joined: May 2012
Posts: 235
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From: Decatur
Well that's no good. So it only happens at 2100 RPM? That's the part that's confusing me. I've never seen anythin like that. Granted I'm not a ford tech, just an Army mechanic. I hope you figure that thing out man.
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Freshman User
Joined: Aug 2010
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From: Palmdale, Ca
Only at one specific RPM and only during warm weather is what confuses me also. It runs fine during the winter months but when it warms up the problem comes back. I have no idea what it is...
Elder User
Joined: Jan 2003
Posts: 828
Likes: 3
From: Baltimore
Add me to list of people looking for a solution to this problem. My brother has a 2003 2wd F350 and it has this exact same problem. What the heck is going on with this engine? It is going to a mechanic next week who thinks he can fix it.
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Freshman User
Joined: Aug 2010
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From: Palmdale, Ca
Until California started pushing diesel inspections, I watched everything through the banks six gun Palm pilot which is now removed. So other then the factory gauges there are none. I am not to crazy about the pillar mount gauge set ups because i use the handle that is there. when Carb gets off is butt and finally gives the OK for the standard six gun kit with the rotary switch control, I will order the switch and reinstall it then order the monitor from bully dog so I can watch everything again. Other then that I have AE to watch and check things......
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Freshman User
Joined: Aug 2010
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From: Palmdale, Ca
If you find out anything please post what they found.....
Hotshot
Joined: Apr 2010
Posts: 19,060
Likes: 238
From: Saratoga Springs,UT
Perfict AE with the Ford Bundle is Great Just what you need
Set the AE up for cylinder balance and watch it when it misfires or whatever
Also scan for codes maybe you did IDK???????
Check the HPO system to
when you start taking operating values do just like this
Just make shure the numbers are taken exactly like this
Truck in PARK OR NEUTRAL all times during test
ECT at 190* or close to And EOT at 185* or higher
-------------------------------------------------------------------
KOEO=Key On Engine Off =record value
Low Idel (truck idel on its own)=record value
High Idel (2500RPM)=record value
Values below are given in this order^^^Left to right
Plug the AE in and check everything
Alittle off topic but FYI any Bulley Dog tuner or Shift on fly tuner is BAD ju ju for the 6.0L
Set the AE up for cylinder balance and watch it when it misfires or whatever
Also scan for codes maybe you did IDK???????
Check the HPO system to
when you start taking operating values do just like this
Just make shure the numbers are taken exactly like this
Truck in PARK OR NEUTRAL all times during test
ECT at 190* or close to And EOT at 185* or higher
-------------------------------------------------------------------
KOEO=Key On Engine Off =record value
Low Idel (truck idel on its own)=record value
High Idel (2500RPM)=record value
Values below are given in this order^^^Left to right
Plug the AE in and check everything
Alittle off topic but FYI any Bulley Dog tuner or Shift on fly tuner is BAD ju ju for the 6.0L
Thread Starter
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Freshman User
Joined: Aug 2010
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From: Palmdale, Ca
It had the banks six gun on it over two years ago but never ran it above level 2 at any time. It was removed when state smog required it two years ago.
I had ran all these test a year ago when the problem showed up and nothing found at that time. I may do it while on the road and log all the sensors since if i remember AE has that capability.
As for test in the driveway. The truck does not act up at all. It only does it while hot out and under load at 2100 rpm. I am not even sure I can make it do it without the trailer. It seems to me that I tried that last year without the trailer but don remember.....
I had ran all these test a year ago when the problem showed up and nothing found at that time. I may do it while on the road and log all the sensors since if i remember AE has that capability.
As for test in the driveway. The truck does not act up at all. It only does it while hot out and under load at 2100 rpm. I am not even sure I can make it do it without the trailer. It seems to me that I tried that last year without the trailer but don remember.....
Hotshot
Joined: Apr 2010
Posts: 19,060
Likes: 238
From: Saratoga Springs,UT
Shure you can Log sensor values while Driving Ford does have some Values for specific set speeds. I dont know the Values for the set speeds or speed itself Bryan has them Values so maybe he can post them up for you. Seems like he had Values for 35mph and 55mph IDK for shure
Taking the values truck in park in driveway is the most accurite way though. When checking the values while driving there are alot of Varibles that can come into play. This is why in park is the Best.
Just cuz the truck isnt acting up Doesnt mean all is OK you could have a Value thats getting to the sensors limit in park and then way out of spec under Load
Id check the Numbers everyway Possible in addition to checking them while its acting up
Taking the values truck in park in driveway is the most accurite way though. When checking the values while driving there are alot of Varibles that can come into play. This is why in park is the Best.
Just cuz the truck isnt acting up Doesnt mean all is OK you could have a Value thats getting to the sensors limit in park and then way out of spec under Load
Id check the Numbers everyway Possible in addition to checking them while its acting up
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Freshman User
Joined: Aug 2010
Posts: 32
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From: Palmdale, Ca
No smoke at all. It was regrettably flashed with the 06E17 flash more or less for the turbo cycling feature. I have avoided any future re-flashes because I did not want to get that inductive heating deal.