Bad idle after its warmed up

[DanielD]

Ok maybe someone can help or point me in the right direction.My '05 6.0 has been in the shop many times for the normal 6.0 problems.Now after it warms up it idles really rough when i come to a stop.When i get back into the gas it goes away.I had a tech listen to it and he said it was a injector.How do i know what injector it is so i can DIY and stay away from the stealership.Thanks in advance

[NYC F-350]

What are you using for oil and filters?

[DanielD]

Originally Posted by NYC F-350

What are you using for oil and filters?

Ford motorcrap filter and rotella oil always and change every 4k miles

[NYC F-350]

You may be experiencing what is known as injector stiction. However this condition usually clears as the truck warms up. To help with that, you could add Rev-X to your oil. 2 bottles added to the oil at the first oil change, and one every oil change after that.

It could also be a FICM issue. You can check this yourself, with some work.
The first step of testing the FICM is to ensure that you can get the best possible result. Given that the FICM is an electronic device, you must start with the batteries.
Remove the batteries from the truck, run them down to the local auto parts store and have them load tested. This test is typically free of charge. If the batteries test out as marginal or fail, replace as a set.
Next, charge the batteries fully. 100% charge. Don't buy what they say about new batteries, they do not always come 100% charged. Charge them up.
Third is to clean and inspect the battery connections. The clamps and the cables. Then reinstall your batteries.
Lastly, there are three voltage readings you will need from the FICM. Key on-engine off, cranking the engine over and when the engine is running.
Here is a link to written direction on how to get the readings you need. <LINK>

If this is not the issue then you could have a failed injector. There are only a few ways of determining which one it is. One is to go to the dealership and have them test it and tell you which one it is. The other is to purchase auto enginuity scanning software for a laptop and testing it yourself, or finding someone that has this that will do it for you. (you would need to purchase the "Ford Bundle" as well.)

If I missed something, a tech will post up where I went wrong when they get out of work. There are a few that frequent the forum.

[cartmanea]

Sounds like a bad injector to me. You need either Ford to scan for contribution codes or find someone with an AutoEnginuity or similar tool that can scan the Ford-specific codes.

[a2elvis]

Yep need some way to monitor cylinder misfires. The NGS will do a power balance test and identify the cylinder(s) that are missing. I think AE will have a balance test as well. Sounds like an injector problem... Any codes?