Hard start rough running

[bdbergmann]

I have a 2006 f-250 Super Duty with the 6.0L Diesel engine. After the truck has been sitting over night it starts hard and belches black smoke until I rev the engine a few times. It will then run fine the rest of the day. The next morning when I go to start it, the whole process starts again. Any ideas?

 

[5.0Flareside]

I'm not great with diesels but this makes me think leaky fuel injector.

 

[blacksnapon]

I have a 2006 f-250 Super Duty with the 6.0L Diesel engine. After the truck has been sitting over night it starts hard and belches black smoke until I rev the engine a few times. It will then run fine the rest of the day. The next morning when I go to start it, the whole process starts again. Any ideas?

Have you had any recent charging or battery issues? Low voltage negatively affects FICM operation.

 

[bdbergmann]

No charging issues.

 

[blacksnapon]

If no mods, I'd first suggest a reflash to address injector stiction.

 

[bdbergmann]

Could it possibly be something to do with the EGR valve?

 

[blacksnapon]

Its entirely possible. Generally, an EGR valve wont just stick, loosen up then stick again (but I've been fooled before by the 6.0). Its easy enough to pull out to inspect though. 2 5/16 bolts, remove the plug, turn with channel locks, then using a "lady foot" prybar under the ears to remove.

 

[bdbergmann]

Thanks, I will try that. I have also heard that there is a fuel pump sensor that causes these syptoms. Do you know what that sensor is called?

 

[bdbergmann]

I pulled the EGR valve out and cleaned it. Replaced, but it is still doing the same thing. I try and start it but as soon as if fires, it kills. Cannot get it to stay running.

 

[blacksnapon]

Thanks, I will try that. I have also heard that there is a fuel pump sensor that causes these syptoms. Do you know what that sensor is called?

There is no fuel pump sensor, but I'm guessing that you're talking about the IPR or the ICP sensor. And no, they wont cause it.