Powerstroke 6.7 – Running rough during regen TSB

6.7 Powerstroke Misfire

6.7 Powerstroke Misfire

If you find that your 6.7 Powerstroke engine often idles rough, there may be a chance it’s misfiring. Misfires sometimes occur when your engine is under load when accelerating. These misfires can lead to sluggish or lurching acceleration.

It’s vital to determine the cause of rough idle or misfire when you first encounter the symptoms to prevent more extensive damage to your engine.

Why Is Your 6.7 Powerstroke Misfiring?

Though an occasional misfire might not seem like a major deal, it can lead to more significant problems if not addressed right away. If you suspect a misfire and your engine has a consistent rough idle, your analysis might be accurate.

In the case of intermittent misfiring, identifying the problem can be trickier. One common culprit behind an intermittent misfire is a malfunctioning fuel injection control module (FICM), particularly if you notice misfires between 45 and 65 mph.

A scan tool may be able to diagnose the issue causing your engine to miss intermittently. If the scan doesn’t reveal any codes, follow the testing protocols at for additional insight. If you still can’t determine the problem, your best option is to have a qualified technician conduct a professional analysis.

6.7 Powerstroke Rough Idle Causes

What Causes Rough Idle in Your 6.7 Powerstroke?

If you’re experiencing rough idle, several issues could be to blame. Some typical signs of rough idle include:

  • Inconsistent RPM readings
  • Bouncing or shaking from the engine
  • Skipping or pinging noises

Several possible causes for rough idle include:

Cause: Static friction inside your vehicle’s fuel injectors.

Solution: Our Stiction Eliminator can clean your injectors and restore compression inside your engine. For further treatment, Diesel Extreme can remove dirty injector deposits and clean the entire fuel system.


Cause: Your injectors are faulty and have failed mechanically.

Solution: Conduct diagnostics for electrical and more severe injector issues with a scanning tool.


Intermittent and Continuous Rough Idle

Why Your 6.7 Powerstroke Idles Intermittently

If your engine is running rough at various times in different conditions, you may have one of several issues. An engine that idles rough when cold but smoother when hot may have stiction inside its fuel injectors. In this case, Stiction Eliminator should fix the problem. The same solution should work if your engine operates roughly only when idling.

Using Diesel Extreme in your fuel tank can also help improve performance by thoroughly cleaning the cylinders and injectors.


Continuous Rough Idle in Your 6.7 Powerstroke

If your 6.7 Powerstroke constantly idles rough, accurately diagnosing the problem might take additional work. Engines with severe static friction will spit and sputter constantly, so Stiction Eliminator could still be an effective solution.

Similar symptoms can also stem from a broken injector, which is beyond the capabilities of our product to repair.

Failing sensors and other electrical issues can result in similar behavior. Using a scan tool to evaluate the problem will provide a more accurate idea of what’s happening.

The contents of, such as text, graphics, images, and other material contained on the Diagnose Your Diesel section are for informational purposes only. Always seek the advice of your mechanic or other qualified professional with any questions you may have regarding your vehicle’s condition.