Am I hearing things??? - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 05-07-2012, 07:16 PM Thread Starter Fanatic
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Am I hearing things???

So I did my EGR Delete and Oil Cooler R/R last week. The truck is running great, lots of power, no leaks spotting the driveway!!

....but. At idle and mostly in the morning when cold it sounds like to me I have an air leak...kinda of a hissing sound. It is louder when VGT% is around 76-77% at idle and cannot be heard when the VGT% is down in the mid 60's or below. I have checked both my up/down pipes and from what I can see with out breaking the wrenches out again they look sealed. (Also I have no exhaust smell from the cab) I also have checked all the CAC boots. Anything else to check?? Could there be a little more "air" noise now since "all" the exhaust is going back to the Turbo? I also am running a Tune for the first time (Econ Only from Quick Tricks)...could that make a difference in sound?

I am pulling the camper for the first time since doing the work in two weeks, would like to figure this out before then or just feel a little more confident before I guess I am going to tear it all apart as it is kinda driving me crazy. Am I just worrying about nothing??

2006 F350 FX4 CC LB Dually Lariat Loaded

Edge CTS Insight w/ EGT & BU Camera
SCT X3 w/ Tunes from Quick Tricks
LT255/80R17 Cooper Discoverer S/T MAXX Tires
Rancho RS7000MT Shocks
PHP Atlas 40 Tuned FICM by FICM
aFe 4" SS Turbo Back Exhaust
EGR & CAT Deleted & Sinister Coolant Filter Kit

Last edited by Face Down; 05-07-2012 at 07:24 PM.
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post #2 of 2 Old 05-07-2012, 07:26 PM
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Check the flex joints on the y-pipe. It's the accordion looking thing.

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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