Knocking Sound / Rough Idle / Lope - Ford Powerstroke Diesel Forum
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post #1 of 20 Old 09-20-2013, 03:24 PM Thread Starter
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Knocking Sound / Rough Idle / Lope

Hey y'all how's it going?


Well one week ago today I got my truck's gaskets, oil cooler, ficm, yada yada yada fixed for a grand total of $4200! Sweet! Now I'm broke! But that's not really the point here...


Drove it since and it's been running great. Though after today trying to get a couple cool photos / videos (which I did get) I parked on the side of the road and I noticed it loping and sounding weird. I noticed I was low on fuel so I thought maybe I just needed to add some fuel and $50 and half a tank later still the same problem.

So now I'm really thinking "Sh*t, there's something wrong here." I get it home and I pop the hood and there's a slight knock coming from the passenger side of the block. Sounds like its right up front but I mean how can you really tell without ripping the truck apart, AGAIN.

When I had my heads checked out they checked out flat and crack free, but shaved .008". From what I read that is still safe and also with them being on the truck before I had it fixed for months with no issues I decided it would be foolish to spend $2500 on new heads. Maybe that was a bad idea. My gut feeling is a valve/piston kissing because of clearance issues but it's just so weird that it happened after months.


My other thought was an injector problem but I'm not getting any codes. Though of course when my FICM was bad I wasn't getting any codes either so I have a feeling maybe my DTC and stuff is like disabled? Is that even possible?


The injectors looked good and 3 of them were new when we had the gaskets done. Turbo was cleaned and it still builds boost but the truck is kind of a dog now, but it doesn't smoke anymore than the occasional puff you can expect with the SCT Tuner I've got on it.


What are your guys thoughts? I'll try to get a video up here tonight if not tomorrow.


I'm absolutely broke now and cannot afford to put anymore $$$ into this so if this truck is gooched because of the valves/pistons etc. it's either A) Getting sold to an idiot or B) Traded in on a cummins. I seriously love my powerstroke to death and I know 6.0s are great trucks once they're maintained and fixed but I just honestly cannot put this money into them. You guys know how good cummins engines are it's the just the dodge they go into. I found one that I really like though so who knows.


Anyway I appreciate any and all help I can get!


Thanks.



EDIT: HERE IS A VIDEO

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2005 F250 SD SCLB. OEM Gaskets, ARP HeadStuds, EGR Delete. BulletProof Diesel 6-phase 58v FICM. Sinister Coolant Filter. STC Fitting, Blue Spring, Stand Pipes and Dummy Plugs. 35" Cooper Discovers on Ford Factory Rims. GlowShift Max Tow gauges. 3" Lift. SCT Livewire (Canned Tunes at the moment, soon to be Looney Tuned). Kensun 6000k Headlights & Foglights. Zoodad Mod. Problem child



Last edited by jmoney330; 09-20-2013 at 08:15 PM.
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post #2 of 20 Old 09-20-2013, 04:39 PM
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I wouldn't go overboard yet. Get a power balance test done, could be an injector with air or trash in it. Multiple thinks can cause a misfire/idle rough/noise. Codes are often stored or "soft" codes before they show their face as well and are able to be read with certain code readers.

2005 F-250
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post #3 of 20 Old 09-20-2013, 05:07 PM Thread Starter
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Alright. And like I said is it possible for the codes to be disabled because when my FICM was bad I never got codes and it was reaching as low as 30 volts.

Could it be bad fuel? I noticed it after I filled up at a questionable gas station, lol.

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2005 F250 SD SCLB. OEM Gaskets, ARP HeadStuds, EGR Delete. BulletProof Diesel 6-phase 58v FICM. Sinister Coolant Filter. STC Fitting, Blue Spring, Stand Pipes and Dummy Plugs. 35" Cooper Discovers on Ford Factory Rims. GlowShift Max Tow gauges. 3" Lift. SCT Livewire (Canned Tunes at the moment, soon to be Looney Tuned). Kensun 6000k Headlights & Foglights. Zoodad Mod. Problem child


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post #4 of 20 Old 09-20-2013, 05:18 PM
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Don't think its possible to disable codes internally. Could have some water in the fuel making it past the separator. You could run an additive or probably best bring it to someone reputable and pull codes do a contribution/injector buzz test and see what happens. I know it sucks but you have to move forward before any damage could possibly get worse.

2005 F-250
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Leveled, American Racing Mojaves Nitto Terra Grapplers
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post #5 of 20 Old 09-20-2013, 05:33 PM Thread Starter
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I understand. I shot a video of it and I'm not going to drive it until I drive it to the shop about a mile away on Monday! I'm being hopeful!

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2005 F250 SD SCLB. OEM Gaskets, ARP HeadStuds, EGR Delete. BulletProof Diesel 6-phase 58v FICM. Sinister Coolant Filter. STC Fitting, Blue Spring, Stand Pipes and Dummy Plugs. 35" Cooper Discovers on Ford Factory Rims. GlowShift Max Tow gauges. 3" Lift. SCT Livewire (Canned Tunes at the moment, soon to be Looney Tuned). Kensun 6000k Headlights & Foglights. Zoodad Mod. Problem child


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post #6 of 20 Old 09-20-2013, 08:16 PM Thread Starter
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Added a video to hopefully give you guys an idea.

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2005 F250 SD SCLB. OEM Gaskets, ARP HeadStuds, EGR Delete. BulletProof Diesel 6-phase 58v FICM. Sinister Coolant Filter. STC Fitting, Blue Spring, Stand Pipes and Dummy Plugs. 35" Cooper Discovers on Ford Factory Rims. GlowShift Max Tow gauges. 3" Lift. SCT Livewire (Canned Tunes at the moment, soon to be Looney Tuned). Kensun 6000k Headlights & Foglights. Zoodad Mod. Problem child


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post #7 of 20 Old 09-21-2013, 02:33 AM
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Sounds exactly like an injector misfire. I dont hear any piston to valve clearance issues or bent push rod issues. Either an injector misfire or the IPR isnt functioning the way it should, but you would see that with low ICP pressures. Power balance should show everything. The code probably is following a few more miles needed for the PCM to verify and produce a hard code.

2005 F-250
FX-4 Manual Trans
MBRP duals
Coolant Filter
CCV Mod
Leveled, American Racing Mojaves Nitto Terra Grapplers
Looney
Livewire
Scangauge II

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post #8 of 20 Old 09-21-2013, 06:12 AM Thread Starter
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Alright. What should ICP be when driving? Last night I did a test drive when I did the video after adding some STP Injector cleaner and of course it didn't help but I monitored my ICP at WOT and it was like 20 something does that sound right?

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2005 F250 SD SCLB. OEM Gaskets, ARP HeadStuds, EGR Delete. BulletProof Diesel 6-phase 58v FICM. Sinister Coolant Filter. STC Fitting, Blue Spring, Stand Pipes and Dummy Plugs. 35" Cooper Discovers on Ford Factory Rims. GlowShift Max Tow gauges. 3" Lift. SCT Livewire (Canned Tunes at the moment, soon to be Looney Tuned). Kensun 6000k Headlights & Foglights. Zoodad Mod. Problem child


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post #9 of 20 Old 09-21-2013, 06:36 AM
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Sounds like a voltage reading, find a conversion table to get psi. Around 4000+-100 for wide open psi. Stock tuned that is.

2005 F-250
FX-4 Manual Trans
MBRP duals
Coolant Filter
CCV Mod
Leveled, American Racing Mojaves Nitto Terra Grapplers
Looney
Livewire
Scangauge II

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post #10 of 20 Old 09-21-2013, 06:42 AM
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The Way that's missing, it should definitely throw a code.
I've used Lots of shaved heads on the 6.0 and never had a problem.
If you don't Hear a Skip while it's cranking, your compression is probably fine.
You probably dropped an injector or have a chaffed wire on an intake bolt under the air intake tube for the turbo.
Don't sweat it. just bring it back.
Probably Minor.
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