14 Fault codes - Would love some input! FICM, Turbo, EGR

[S13xCrazy]

Hey guys,
New to the forum! Just started servicing a fleet of 6.0 Diesels a couple months ago so I am relatively new to the 6.0 game! Wondering if the experts can throw me some help!

Basically, I was told the truck has been running rough for a couple months (owner neglect, never said anything and didn't bother to bring it in) and has been steadily losing power. The truck is running rough, and currently won't rev over 2500 RPM or do more than 55 MPH. Even at that, it's a struggle to get there. The truck DOES blow blue and white smoke once and a while. The turbo sounds awful and is not building any boost (assumption for lack of power!) Owner said he started off at a max off 55 then it dropped to 35mph for a while.

The truck is a 04 (late model I BELIEVE, have to double check) F-450 with the 6.0.

Codes are as follows:

0069 - MAP - Baro Pressure Correlation
0113 - IAT Circuit High Input
0266 - Cylinder 2 Contribution
0274 - Cylinder 8 Contribution
0299 - TC/SC Underboost (Again, turbo is likely in need for repair)
0336 - CPS Performance
0403 - EGR Circuit Fault
0404 - EGR performance
0405 - EGR A Circuit low
0470 - Exhaust Pressure Sensor Circuit Fault
0471 - Exhaust pressure Sensor Circuit performance
0478 - Exhaust Pressure Control Valve high
2285 - ICP Sensor circuit low

My understanding is that 0069, 0299, 0470, 0471 can be a exhaust pressure sensor being contaminated and/or the tube being clogged.

Did a quick look over the normal harness chaffing spots and they all seem to be OKAY, some wear on the casing but that can be expected.

MAP hose looks okay, will check/replace though.

Any suggestions/tips where to start? According to my Solus PRO the TICM is at 48 volts both when off and when cranking/started.

This IS a commercial truck, so EGR deletes and such are not acceptable.

Thanks guys!

[Turbostang500]

I am no expert, but I have done some diagnosis before. If I were starting with that kind of history and that many codes, I would write them all down for future ref then clear everything and drive it a little till you get codes again (probably wont be long). This way you can hopefully narrow down some of the codes that may not be from the cause of the problem(s).

Also, I would do an inspection of all the fluids and look for cross contamination.

I guess that would be the best start IMO.

Good luck!

OH..................

[S13xCrazy]

Originally Posted by Turbostang500

I am no expert, but I have done some diagnosis before. If I were starting with that kind of history and that many codes, I would write them all down for future ref then clear everything and drive it a little till you get codes again (probably wont be long). This way you can hopefully narrow down some of the codes that may not be from the cause of the problem(s).

Also, I would do an inspection of all the fluids and look for cross contamination.

I guess that would be the best start IMO.

Good luck!

OH..................

Truck is literally not driveable, had to limp it into the shop.
No cross contamination in fluids, all of that is good.

Basically, at first my thought was wire chafing. But again, it all looks good from a quick once over.

My thoughts are that the injectors went (2 and 8) and was the problem for the initial problems. After continuing to drive, the EGR/Emission related components became clogged. Continued to drive, problem spread like cancer, putting it in its current condition. This would account for 0069, 0266, 0284, 0299, 0403, 0404, 0405, 0470, 0471, 0478, 2262.

However, the 2285 code for ICP sensor I have read that the HPOP's can leak oil onto the sensor and cause similar problems. Which would potentially clear 2285, 0284, 0266.

0113 is just because we removed the intake (I forgot I plugged in the solus after we removed the intake, it updated the codes then)

[S13xCrazy]

Figured I would come and answer my own question for anyone with similar problems.

Basically we had three things wrong.

EBP Sensor (Exhaust Back Pressure) was bad and the metal hose running to the sensor was 100% clogged. Literally had to spend an hour cleaning it out.

The EGR Valve was also bad. I just swapped it out with a new one.

Injectors 2 and 8 are also shot. Going to go ahead and replace 2, 4, 6, 8 as I hear when one goes they go on a spree.

[southend]

thanks for the update.....