Rough running & almost no power

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Jun 5, 2013 | 10:12 PM

tbax46

Thread Starter

Senior User

Joined: Nov 2004

Posts: 196

Likes: 1

From: Texas

Rough running & almost no power

Need some help. Just pulled my trailer into my kids driveway and unloaded, then decided later to go somewhere and when I start the 6.0, she knocks, blows white smoke and won't hardly pull itself out of the driveway. It has the head studs, blue spring regulator, new oil cooler, recent cooling system flush, oil changes every 5k on the button, egr delete and mild tune (40 hp) to keep the check engine light off. Any ideas from you long time owners?

Jun 5, 2013 | 11:27 PM

mustang_309

Logistics Pro

Joined: Dec 2004

Posts: 4,138

Likes: 7

From: South Weber, Utah

My guess would be 1 or more bad injectors. Have you pulled the codes? You would be amazed how bad one bad injector will make it run.

Jun 6, 2013 | 12:55 AM

Frankenbiker

Fleet Mechanic

Joined: Jan 2007

Posts: 1,741

Likes: 3

If the batteries are more than two years old, check them and then the FICM.

-blaine

Jun 6, 2013 | 03:20 AM

04badford

Lead Driver

Joined: Sep 2012

Posts: 7,830

Likes: 96

From: Manteca,Ca

Do you have a Gauge to read live Data?, whats Ficm vlts? Alt? batteries? and year of truck?and any work done recently ? tunners deletes?

Jun 6, 2013 | 01:34 PM

04WVPSD

Freshman User

Joined: Jun 2007

Posts: 37

Likes: 0

From: West Virginia

Ditto on the bad injector. Mine is down with the same problem as we speak and had the exact same symptoms. I just keep having this problem as you may notice from my thread on continued injector problems on this site. Unfortunately, there are many things that could contribute to an injector failure. Lots of good info on here and especially in the tech folder. Good luck!!

Jun 6, 2013 | 04:17 PM

tbax46

Thread Starter

Senior User

Joined: Nov 2004

Posts: 196

Likes: 1

From: Texas

As we speak she's in the shop with two bad injectors. Fuel pressure also is at 40 and they are going to recheck it to see if it needs a fuel pump.

Jun 6, 2013 | 05:15 PM

mustang_309

Logistics Pro

Joined: Dec 2004

Posts: 4,138

Likes: 7

From: South Weber, Utah

Good to hear you got her figured out, at 40 PSI if the filters are fine I would replace the fuel pump. But there is also the possibility that the fuel pick up in the tank could be plugged causing the pump to be starved of fuel. 45 PSI is the minimum spec on fuel pressure at WOT anything less is a death sentence for the fuel injectors.

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Jun 7, 2013 | 09:07 PM

tbax46

Thread Starter

Senior User

Joined: Nov 2004

Posts: 196

Likes: 1

From: Texas

The suggestions here were worth it. After they replaced two injectors and the fuel pump, we got to tracing things back to see what caused what. The filter was full of water, then I had them pull the tank and clean it. they found it very dirty with debris. The techs (and I agree with them) believe that is where it all began. Crap from the tank clogging the pickup and then the filter, then harming the pump and finally the injectors. Was a bit expensive, but it runs like a charm now and it's getting the fuel mileage it's suppose to be getting.
Thanks again for all the input. Hearing your experiences helped the hunt for causes. Also checked the batteries and FICM and they all came out fine, thankfully.