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Discussion Starter · #1 ·
My truck sure is cackling alot now that the winter temps are here.

What are the reasons for this?

Poor fuel pressure?

Worn injectors?

Any and all suggestions appreciated.
 

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fuel pressure has a lot to do with it. Ever rebuild the regulator?
 

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Discussion Starter · #3 ·
I have never touched the fuel system except to change fuel filters and drain fuel bowl as part of maintenance schedule.
 

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Are you hearing just the #8 injector knock or just loud injectors when cold?

5w-40 oil and some sort of fuel line mod helps a lot with injector noise.
 
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Boy, there sure were a ton of discussions on here about 15 years ago to do with 7.3L cackle. I don't recall if everyone finally agreed on the most predominate root cause of it or not. If I recall, there was a ton of fuel system mods being experimented with at the time.
 

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Discussion Starter · #6 ·
Boy, there sure were a ton of discussions on here about 15 years ago to do with 7.3L cackle. I don't recall if everyone finally agreed on the most predominate root cause of it or not. If I recall, there was a ton of fuel system mods being experimented with at the time.
Thank you Phil. I will do some archive searches.

I have a big trip planned to FL and I would like to try and sort this out in the next few days if it a fuel pressure issue.

Any suggestions for installing a fuel pressure guage in the cab ?
 

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Wow... that article takes me back, everyone in the early 2K's was freaking about their 7.3L cackle issue.... then the first 6.0L came along in Nov of 2002 and peoples shiny new trucks were sitting on dealers lots by Jan waiting on replacement injectors :surprise:... cackle seemed so insignificant after that.
 

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Not sure what to suggest that hasn't been suggested before on the fuel gauge install. I don't have one...yet. The main thing is to make sure you don't use a full mechanical gauge that runs diesel up into the gauge, you don't what that inside your cab. But I imagine you already new that, your probably looking more for the specifics of how to connect one the best way to a 7.3L.
 

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anyone got a write up on fuel bowl rebuild?
 

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Discussion Starter · #14 ·
It sounds like my FPR is atleast part of the problem.

Are you guys finding it better to rebuild the stock Fuel Filter Housing assembly or replace with aftermarket fuel systems?

My goal is to keep costs down on this project.

Thanks
 

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It sounds like my FPR is atleast part of the problem.

Are you guys finding it better to rebuild the stock Fuel Filter Housing assembly or replace with aftermarket fuel systems?

My goal is to keep costs down on this project.

Thanks
rebuilding the existing regulator will be much, much cheaper.
 

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I remember a long time ago there was ton and tons of discussion and even some heated arguments over cackle and knock. There was even a guy with the initials of KL that was having people sign a non disclosure agreement to get in on his so called fix. I ended up going with the Hutch mod with the Housted T and went with the Billet FPR and black spring. My cackle went away mostly but the knock never has. I replaced the Long Lead #8 injector with a an AD, helped a little. I've done the FRX, HPX and CVD fittings change out, still knocks. Fuel pressure stays at 68 to 70 psi always. I am done I am not going to do anymore chasing the elusive knock fix, if there is such a thing. I think the only way to get rid of the knock is change the firing order, which we all know cannot be done. The one thing that still gets to me though is why, every once in a while the motor will smooth right out and just purr no knock, no rattle just pure beautiful diesel idling away. It's a beautiful thing.
Bill
 
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