cold 6.0L won't shift
Thread Starter
|
New User
Joined: Dec 2005
Posts: 4
Likes: 0
cold 6.0L won't shift
Our 2005 F250 6.0L has begun not shifting properly on the first start of the day, when the outside temperature is less than 60 degrees. Idling around the neighborhood - no issues, but when hitting the on ramp I have to coax it up to speed or it flat refuses to shift. If I let off the fuel just a tad, it shifts, but hard. Once warmed - it is flawless, except on some grades it will stutter on occasion - but I suspect it might be another issue.
With either issue, no codes, no smoke. We've recently replaced the fuel control module, and fuel pump along with injector harness.
Any ideas?
Robert
With either issue, no codes, no smoke. We've recently replaced the fuel control module, and fuel pump along with injector harness.
Any ideas?
Robert
Thread Starter
|
New User
Joined: Dec 2005
Posts: 4
Likes: 0
No, I really don't think it is the tranny either - I am more suspect of a line or sensor - but have no idea as to where to start. Don't have a Scangauge2.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
I've seen several 6.0L trucks with this problem. The issue is that the engine isn't making the power it should be when cold. You have the pedal pushed down further than you think to get the performance, so the trans thinks you are near WOT, which you really are. That makes the shifts late. Find out why the engine isn't making power cold and then the trans will shift right.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 243
From: Saratoga Springs,UT
I agree FICM or Injectors
Get you a Gauge that plugs into the OBDII Port to take some readings
Welcome to the FTE crowd
Get you a Gauge that plugs into the OBDII Port to take some readings
Welcome to the FTE crowd
Trending Topics
Lead Driver
Joined: Sep 2012
Posts: 7,833
Likes: 96
From: Manteca,Ca
I uselly wait until eot is 90s and ects are around 100s before I drive the truck this also helps heat the trans fluid , watch your gauge , and not the ones on the dash cluster.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
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
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
Yup FICM or Injectors is my diagnosis too. Seen it toooo many times.
Senior User
Joined: Apr 2011
Posts: 166
Likes: 0
Do you let the truck warm up at all or just take right off?? If I start mine up and take off with a minute or two, but truck doesn't like to shift either. My tranny temp though is ice cold at the time, which makes me think it is designed that way. Now if I let my truck warm up for a bit it is just fine.
Lead Driver
Joined: Sep 2012
Posts: 7,833
Likes: 96
From: Manteca,Ca
X2 on the Injects
Former Vendor
Joined: Feb 2010
Posts: 1,803
Likes: 6
I agree that is a lack of adequate power issue caused either by sticking injectors or a bad FICM. Check out the FAQ page on FICMrepair.com for a how to on checking the output voltage of the module - spec is between 45 and 50 volts. We'd be happy to take care of you if that is the issue.
Thread Starter
|
New User
Joined: Dec 2005
Posts: 4
Likes: 0
Well shucks - after much effort everything (voltages, etc.) checked fine, I took it to the dealer for a cold morning start - no codes but they reported that injectors 2,4, and 8 were failing. Still, after an expensive bill, this mornings start was less than spectacular. Since I had to pull a 8000 trailer this morning I was watching everything very closely, and I could be wrong, but it seems like I've lost some umph.