gray smoke w/ loss of power upon deceleration - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 11-18-2010, 06:41 AM Thread Starter
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gray smoke w/ loss of power upon deceleration

Hi Folks!! 2005 f250 powerstroke-- 107k miles.. started this weird symptom of losing power and creating light gray smoke coming off the ramp. If I baby it on neutral, it'll recover. What is it??
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post #2 of 8 Old 11-18-2010, 06:58 AM
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Sounds like an EGR problem to me.

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post #3 of 8 Old 11-18-2010, 07:09 AM Thread Starter
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Thank you sir... so where do I look how would I know ? Can I clean it? SUPER new in this SUPER crew business. I appreciate the assistance.
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post #4 of 8 Old 11-18-2010, 08:47 AM
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Thank you sir... so where do I look how would I know ? Can I clean it? SUPER new in this SUPER crew business. I appreciate the assistance.
Start by cleaning the EGR valve.
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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 #5 of 8 Old 11-18-2010, 09:21 AM Thread Starter
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THANKS for help sir, but where is this item located?? Pls Excuse my ignorance.Now I can see where the decreased power might be coming from. bUT what's causing the smoke?? Thank you
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post #6 of 8 Old 11-18-2010, 09:34 AM
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The smoke comes from the coolant being burnt or thats what I think. The EGR valve is located on the intake manifold.

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post #7 of 8 Old 11-18-2010, 02:47 PM
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THANKS for help sir, but where is this item located?? Pls Excuse my ignorance.Now I can see where the decreased power might be coming from. bUT what's causing the smoke?? Thank you
This link will help you with the EGR valve location and how to.6.0L EGR Maintenance and Cleaning (Write-Up)


And this link will take you to a PDF file on the 6.0 manual.PDF Tech manual

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post #8 of 8 Old 11-19-2010, 08:58 AM Thread Starter
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It was the EGR.. ordered the o-ring kit yesterday and fixed it last night. YOU GUYS ARE AWESOME! Had to "yank" on it quite a bit being that it has 107k miles and I believe this is the 1st time it was done. Soaked it in some "solvent" for about 30 mins...Major angioplasty in my opinion. It was caked on there pretty thick! I attached a 1/2 PVC tubing at the end of my shopvac and vac'ed away in the EGR hole. Ran beautifully this morning! THANK YOU!
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