Buzzing/vibrating sound Prestart and post shut off - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 01-03-2010, 07:12 PM Thread Starter
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Buzzing/vibrating sound Prestart and post shut off

My 05 psd has a buzzing/vibrating sound when I turn the key to right before turning the ignition on. Does anyone know what I am talking about? I have always waited for that buzz to stop before I turned on the truck, because I was told by a Ford Service tech that a long time ago and have stuck to it. But now I am trying to remember what it is, why it is, and if I should really be doing that.

Also, a few years back I took it in for a system/computer update and after that it made a similar sound after shutting the truck off. The same tech told me that that truck was self-cleaning itself (something about some fluid lines) . Anyone know about that sound and what it is? I have not noticed it lately on my truck for a long while now, actually. It may be because my computer may have reset when my batteries dies.

It is a different type of buzz/vibrating sound pre and post, I believe.


2005 Ford F-250 Black/Brown Lariat 4-door/shortbed
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Last edited by mad103; 01-03-2010 at 07:19 PM.
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post #2 of 11 Old 01-04-2010, 06:11 AM
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At startup it's the FICM cycling the injector coils to warm them and help injectors that have stiction issues. The shutdown was basically the same thing but from what I understand was to help prevent oil from coking on the injectors. Not sure what Fords official statement was but seems to be consensus when reading about it.



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post #3 of 11 Old 01-04-2010, 06:36 AM
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Thats an old flash. There is a new one that only cycles the injectors at key on.

The old flash you describe was replaced with the new one because that one was destroying FICMs

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post #4 of 11 Old 01-04-2010, 09:37 AM Thread Starter
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So I do not need to worry that I do not get that post shut off sound anymore? So am I doing the right thing by allowing that cycling to finish off before I turn on the truck? Lastly, how can I know if I have the latest flash and/or how can I get it without taking it to Ford. Can a tuner help?


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20" Rims and 38" Tires
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post #5 of 11 Old 01-04-2010, 10:38 AM
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Quote:
Originally Posted by mad103 View Post
So I do not need to worry that I do not get that post shut off sound anymore? So am I doing the right thing by allowing that cycling to finish off before I turn on the truck? Lastly, how can I know if I have the latest flash and/or how can I get it without taking it to Ford. Can a tuner help?
You have to get it from Ford. Have you been at the dealer recently

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2006 F250 ECSB Lariat 4x4

Leveling kit, 315/70/17 Kelly TSRs on Method race wheels
ARP studs and OEM gaskets done by Renegade Diesel
ECM and Atlas 40 FICM tuned by Bill at PHP SCT tunes by Truck Source Diesel. Gearhead, Innovative, Wildman and Tyrant diesel
Flowmaster/MBRP Hybrid Exhaust
Edge Insight CTS
Coolant filter
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post #6 of 11 Old 01-04-2010, 10:56 AM Thread Starter
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^ No I have not. Havent had a reason to take it in. Would the flash be overwritten with a tune because I am purchasing a tuner soon?


2005 Ford F-250 Black/Brown Lariat 4-door/shortbed
8" Fabtech Lift
20" Rims and 38" Tires
LineX Bedliner
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post #7 of 11 Old 01-04-2010, 03:59 PM
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I would start with the latest PCM/FICM/TCM calibrations if you are using a tuner that builds on the stock flashes.

There is some neat stuff in the new flash that monitors ECT/EOT temperatures and turns the wrench light on if there's an oil cooler restriction, it also alters EGR valve operation if there's an oil temp/coolant temp issue.

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post #8 of 11 Old 01-04-2010, 04:05 PM
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ive got the same sound coming from my 03 7.3

anything but a chrysler product

the only thing that runs good on a dodge is the drivers mouth

dodge boys

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post #9 of 11 Old 01-04-2010, 06:47 PM
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Like Dave said...get it flashed (usually $95 bucks) its worth it. Also the new flash helps with sticking turbo vanes.

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post #10 of 11 Old 01-04-2010, 06:57 PM
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I have that on my truck and it never burned up my FICM and it was the last one for the the older 6.0's. Before anyone jumps on me about it this was told by me by a vendor/tuner that its good for my 03.

Matt at Gearhead,Doug at GoGo,Dave at Diesel Innovations,Ryan at Full Force Diesel,Eric at Innovative. Adam at First Coast

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