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Old 10-12-2011, 08:55 AM
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boost w/egr delete

I have a 04 f-250 and found out it had a egr delete when i bought it. My question is that it has a p0401(egr flow insufficent) code and will only build 20psi of boost. Is this normal or is the egr code making my boost lower than normal. And if so how can i fix the code and get my boost back without custom tunes since i don't have the funds for them right now.
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Old 10-12-2011, 10:00 AM
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Boost is a measure of restriction to flow, and NOT the flow of air itself. Raise the restriction in the intake, boost will climb, but the engine gets less air.
I am a little surprised to see that you get that code, and the only way to get rid of it permanently is a custom written tune that excludes EGR functions.
Try resetting the code and see if your boost returns (before the code returns).
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Old 10-12-2011, 10:16 AM
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Boost won't ever get above 20. I have reset the code and tried and it will still only get 20.
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Old 10-12-2011, 10:25 AM
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Quote:
Originally Posted by cweiss87 View Post
I have a 04 f-250 and found out it had a egr delete when i bought it. My question is that it has a p0401(egr flow insufficent) code and will only build 20psi of boost. Is this normal or is the egr code making my boost lower than normal. And if so how can i fix the code and get my boost back without custom tunes since i don't have the funds for them right now.
Did you remove the EGR valve?
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Old 10-12-2011, 10:26 AM
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Theres a few things you can do to ensure optimal running.
Cleaning things up might work. It doesn't cost you much other than some time.
Map sensor hose. MAP sensor is on top of the HVAC box on a triangular sort of bracket. Chase the rubber hose on that down to the intake. Check it over for cracks, splits. It connects to a brass nipple on the intake. Take an allen wrench (or small phillips screwdriver) and poke into the hole. Just make sure the hole is open. I say to use an allen wrench so that if you drop it, it will not enter the intake.
The next thing to clean is the EBP sensor and tube.
Attached to the thermostat housing is a long stainless steel tube that has a sensor perched on top of it. Use two wrenches (one on the tube, one on the sensor) and remove the sensor. Clean the end of the sensor with carb cleaner. Use a long piece of tiewire and insert it down into the tube. You can not hurt anything, since the tube goes to the exhaust manifold. You want to make sure the tube is clear. You could also spray a bit of brake cleaner down the tube.
See if this helps, if not, you might have sticking vanes in the turbo.

EDIT:

Quote:
Originally Posted by DesertSmoker View Post
Did you remove the EGR valve?
What he said...
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Old 10-12-2011, 10:32 AM
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Quote:
Originally Posted by DesertSmoker View Post
Did you remove the EGR valve?
The egr valve is still there. I haven't removed it yet but was planning to to see if it was dirty until i seen the delete.
NYC F-350 thanks for the info I will have to try that saturday when i'm off work again.
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Old 10-12-2011, 10:37 AM
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Quote:
Originally Posted by cweiss87 View Post
The egr valve is still there. I haven't removed it yet but was planning to to see if it was dirty until i seen the delete.
NYC F-350 thanks for the info I will have to try that saturday when i'm off work again.
Make sure you keep the EGR valve plugged in.
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Old 10-12-2011, 10:45 AM
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Yeah it's still plugged in. I've read that unpluggin it will mess with the engine fan.
Would puttin the egr cooler back in do anything to bring the boost back up? It will have to be reinstalled since I have to do emissions here. The inspection station is most likely gonna have to pay for that to be done
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Old 10-12-2011, 10:58 AM
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Do all the work that NYC suggested then do a VGT Turbo Relearn process. I had the same problem now I hit 29. I had a lot of help from all the guys on here!
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Old 10-12-2011, 11:02 AM
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Yeah I'll try that this weekend. Thanks for the help from both of ya.
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