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Old 01-25-2014, 12:46 PM
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Having issues since egr delete and oil cooler install

I have a 2005 F250 6.0.I installed a sinister egr delete and replaced my oil cooler last week. I also did the blue spring mod. I put everything back together and it seemed to drive alright for the first day. The next morning I loaded a custom tune into the truck and started it up. I noticed it sounded more like a v8 rumble sound rather than the normal turbo jet sound i get from my 5" exhaust. I took it for a ride and everything seemed ok i just noticed it was boosting a little different probably from the tune. Next day i took it out and had the same v8 rumble sound and no turbo sound at idle. Took it to get a wash and started it up and all of a sudden it had the turbo sound back at idle. Noticed when it had the v8 sound at idle the vgt was at 41% and when it had the turbo sound at idle the vgt was at 85%. Drove down the road and just barely touching the gas i was already hitting 25-30 psi of boost and the vgt holding at 85%. Pulled into my driveway and i heard the exhaust tone change and the vgt dropped to 41% again. I checked for codes and pulled up p0470,p0472,p0478. I checked my fbp psi and it is constantly stuck at 36 and my map and baro were around 14. Tried to unplug the ebp sensor and had the same issue the the truck and the value for the ebp stayed at 4. I tried loading the stock tune back in and still have the same issues. Yesterday i plugged back in the ebp sensor to check again and it stays at 36 no matter what i do. Then all of a sudden i noticed my oil pressure gauge dropped and my dash said low oil pressure. I turned off the truck and started it back up and the oil pressure gauge went back up and then about 10 seconds later it dropped again but the truck still runs. I ordered a new ebp sensor today. Can this sensor cause this high boost issue? Or does this sound like a electrical issue causing all these different problems? Please HELP. Thank you all
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Old 01-26-2014, 04:04 AM
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I'm no expert and I definitely do not want to give any bad advice. But have you cleaned inside your turbo lately?
The oil pressure may be a second unrelated issue. Could anything possible fallen in the oil cooler area?

I'll wait for someone else to chime in.
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Old 01-26-2014, 05:53 AM
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No i did not clean the turbo when it was out but it looked ok and never had any issues with it before. I did change the oil drain line and and turbo feed line when i reinstalled the turbo.Also i changed the hpop screen and put a new screen with the oil cooler i am pretty sure nothing fell in there.
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Old 01-26-2014, 05:55 PM
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Anyone have any info for me on these issues? Thank you
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Old 01-26-2014, 06:16 PM
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Out of curiosity, Did you pull the HPOP out? If so, what color washer went under your HPOP?
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Old 01-26-2014, 06:48 PM
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No I didn't pull the HPOP.
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Old 01-27-2014, 07:14 PM
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Yes,
A bad back pressure sensor could cause those problems. It definitely sounds like your VGT is not acting right. When the truck is cold, it closes the turbo vanes so that the back pressure builds up to heat up the engine. Once it is warm, if the back pressure is reading too high, it opens up the vanes so that the back pressure can be reduced.
If the back pressure sensor is not changing, it could be the sensor itself. That sounds like it could be a problem if it is reading 36 when you turn on the key and the engine is not running if you mean 36 PSI.
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Old 01-28-2014, 02:42 PM
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Yes my reading from my insight cts is showing 36 psi with KOEO and at idle and when driving. When I disconnect the sensor it stays at 4psi all the time also.
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Old 01-28-2014, 03:12 PM
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From the information you have provided, that EBP sensor is where I would be focusing my attention. make sure the tube it goes on is clean also.
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Old 01-29-2014, 04:13 PM
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Quote:
Originally Posted by divotf15 View Post
From the information you have provided, that EBP sensor is where I would be focusing my attention. make sure the tube it goes on is clean also.
This.

If that doesn't fix it I would be double checking the turbo for stuck vanes and the vane actuator solenoid and wiring. A stuck-closed VVT is the quick path to head-gasket land.
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