cold 6.0L won't shift
Laughing Gas
Joined: Mar 2012
Posts: 1,052
Likes: 28
From: Portal, AZ
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.
As stated by most already defitely sounds like an injector and or FICM issue.
Former Vendor
Joined: Feb 2010
Posts: 1,803
Likes: 6
Sounds like you got re-flashed at Ford. With the latest software comes a loss of power, sadly. Most see a reduction in fuel economy, too! If you'd like to re-gain that power (and, as an option, then some!), ship the module on over to us and we can get you set up with an aftermarket software option that you will LOVE.
The Atlas 40 option is by far the most popular, but all of them have their place.
Hope this helps!
The Atlas 40 option is by far the most popular, but all of them have their place.
Hope this helps!
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
No offense but absolutely not needed if your truck is running right. Waste of fuel and not doing the engine any favors. Just don't floor it til warmed up.
Lead Driver
Joined: Sep 2012
Posts: 7,834
Likes: 96
From: Manteca,Ca
2nd Gear
Joined: Nov 2024
Posts: 2
Likes: 0
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.
Token Redneck
Joined: Jun 2007
Posts: 9,339
Likes: 350
From: Breckenridge, TX
Oil viscosity. It's easy to tell a difference between 15W, 5W, and 0W during cold starts. Failing FICM = less power to the injector coils to shuttle against cold oil to allow oil in to push the fuel plunger = lower power.
If a FICM is bad enough it will run poorly at all temps, but by that time there's normally a compounded issue in the injectors themselves due to the low votlage.
I saw this same "weird shifting" issue on a 2003 with 285k, original injectors and HPOP. Was just an overall wearing out of the HPOP system, new sticks and pump and solved.
If a FICM is bad enough it will run poorly at all temps, but by that time there's normally a compounded issue in the injectors themselves due to the low votlage.
I saw this same "weird shifting" issue on a 2003 with 285k, original injectors and HPOP. Was just an overall wearing out of the HPOP system, new sticks and pump and solved.
2nd Gear
Joined: Nov 2024
Posts: 2
Likes: 0
Oil viscosity. It's easy to tell a difference between 15W, 5W, and 0W during cold starts. Failing FICM = less power to the injector coils to shuttle against cold oil to allow oil in to push the fuel plunger = lower power.
If a FICM is bad enough it will run poorly at all temps, but by that time there's normally a compounded issue in the injectors themselves due to the low votlage.
I saw this same "weird shifting" issue on a 2003 with 285k, original injectors and HPOP. Was just an overall wearing out of the HPOP system, new sticks and pump and solved.
If a FICM is bad enough it will run poorly at all temps, but by that time there's normally a compounded issue in the injectors themselves due to the low votlage.
I saw this same "weird shifting" issue on a 2003 with 285k, original injectors and HPOP. Was just an overall wearing out of the HPOP system, new sticks and pump and solved.
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