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post #1 of 13 Old 03-30-2012, 08:55 AM Thread Starter
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P0401 Need Help!!

Hey guys,

weird thing happening, couple weeks back I replaced my thermostat on my truck and ever since I have been getting a check engine light for EGR insufficient flow (P0401). I do have a EGR delete and I have custom tunes from Vivian at quick tricks to turn off the EGR stuff, anyone have this happen or have any ideas of how to fix it?

Thanks!


2005 6.0 Powerstroke
EGR Delete
4in MBRP straight Piped exhaust
Edge Insight CS
SCT custom tunes from Vivian @ Quicktricks
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post #2 of 13 Old 03-30-2012, 09:03 AM
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Give Vivian a call, she can either fix the current tune, or send you a new one.

She might of forgot to turn off the EGR in the tune, poop happens!! We are only human.

2004 F350 CC DRW King Ranch
X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB
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post #3 of 13 Old 03-30-2012, 09:05 AM Thread Starter
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Thats the problem tho, I gave her a call and she said it was turned off.... I don't know where to go from there...


2005 6.0 Powerstroke
EGR Delete
4in MBRP straight Piped exhaust
Edge Insight CS
SCT custom tunes from Vivian @ Quicktricks
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post #4 of 13 Old 04-04-2012, 04:15 AM Thread Starter
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Has anyone had something like this happen?


2005 6.0 Powerstroke
EGR Delete
4in MBRP straight Piped exhaust
Edge Insight CS
SCT custom tunes from Vivian @ Quicktricks
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post #5 of 13 Old 04-04-2012, 05:21 AM
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What are you using to pull up codes???

You may have other codes, but whatever scan tool your using may only be able to show the p0401 and not the others.

2004 F350 CC DRW King Ranch
X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB
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post #6 of 13 Old 04-13-2012, 08:39 AM Thread Starter
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I am using a edge CS insight


2005 6.0 Powerstroke
EGR Delete
4in MBRP straight Piped exhaust
Edge Insight CS
SCT custom tunes from Vivian @ Quicktricks
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post #7 of 13 Old 04-13-2012, 06:01 PM
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Check the wires to your MAF sensor, they clip to the oil dipstick tube. they become brittle and break, maybe you tweaked a wire while doing the Thermo. Give them a tug, they should be able to take it, other wise you'll see the insulation stretch if the wire is broken internally.

2004 F350 ECSB Powermax, 4" turbo back with muffler, SCT Livewire w/ SRL, ARPs, EGR delete, Spring, Banjos, some other zoodads

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post #8 of 13 Old 04-15-2012, 06:14 PM Thread Starter
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How do you fix the wire if it broke? Crimp them back together?


2005 6.0 Powerstroke
EGR Delete
4in MBRP straight Piped exhaust
Edge Insight CS
SCT custom tunes from Vivian @ Quicktricks
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post #9 of 13 Old 04-15-2012, 06:23 PM
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You need to buy the pigtail from ford, its a pretty common problem, I was chasing that for a little while

2004 F350 ECSB Powermax, 4" turbo back with muffler, SCT Livewire w/ SRL, ARPs, EGR delete, Spring, Banjos, some other zoodads

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post #10 of 13 Old 04-15-2012, 06:49 PM Thread Starter
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I just looked and they seemed to be in tact, gonna look harder tomorrow when I have more light, but I know my air filter doesn't line up perfectly, think that could trip that too?


2005 6.0 Powerstroke
EGR Delete
4in MBRP straight Piped exhaust
Edge Insight CS
SCT custom tunes from Vivian @ Quicktricks
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