Insufficient fuel delivered to number 8 cylindar - inherent engineering flaw - Ford Powerstroke Diesel Forum

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post #1 of 17 Old 07-22-2009, 10:21 AM Thread Starter
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Insufficient fuel delivered to number 8 cylindar - inherent engineering flaw

Ford 7.3 liter Power Stroke Diesel engine (on 2000 Ford Excursion Limited, 4X4) - insufficient fuel delivered to number 8 cylindar - inherent engineering flaw



All late model (I believe 1999 to present) Ford 7.3 liter Power Stroke Diesel engines suffer from an inherent engineering flaw, the fuel delivery system does not provide sufficient fuel to the number 8 cylinder for a full firing stroke. The engine will develop a loud "injector clatter" on the number 8 cylinder and appear to have a miss-fire resulting in rough idle and significant vibration of the engine and vehicle.



The cause of this problem is the fuel delivery system cannot supply sufficient fuel to the number 8 cylinder when it is needed because another cylinder is using the majority of the available supply at the time the number 8 needs the fuel. A basic design flaw in the fuel delivery system. Further, there is a significant lack of power in an engine that should be able to pull a house off the foundations.

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Can you guys tell me what I can do to fix this?? Is there a way to get the much needed fuel to the # 8 with out breaking the bank

2002 7.3 liter Excursion no mods yet... but looking foward to it.
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post #2 of 17 Old 07-22-2009, 10:26 AM
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There's like a $40.00 crossover hose that is supposed to help with that. I think Raul at Stealth sells them, as well as ITP and places such as that. Look under the sponsors.

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post #3 of 17 Old 07-22-2009, 10:30 AM
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A "balance" tube may or may not help. A full regulated return is the only real fix.


To help mask this problem, the AE code injector was developed and installed in the number 8 cylinder.

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post #4 of 17 Old 07-22-2009, 10:39 AM Thread Starter
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First thanks guys for the responses.. Is there any instructions on how to do a full regulated return, and the cost associated with it ? I would like to try the tube first, but really what the power back, smooth idle back, and the knocking to go away.

2002 7.3 liter Excursion no mods yet... but looking foward to it.
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post #5 of 17 Old 07-22-2009, 10:44 AM
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I don't know the prices of a balance tube for the fuel side. Most vendors have dropped it. If you want, I can pm you a link to a full regulated return.

There are many regulated return kits out there (that include everything you'll need) and they are all over $400.

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post #6 of 17 Old 07-22-2009, 10:47 AM Thread Starter
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Did they drop them because they found the "X" over tubes don't work

2002 7.3 liter Excursion no mods yet... but looking foward to it.
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post #7 of 17 Old 07-22-2009, 10:53 AM
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That and lack of interest when people started ditching them for regulated returns. There was a certain person a few years back that made a crude hose that tied the 2 rear fuel ports together. Kept claiming that it was a "fix".

Didn't fix anything.


A regulated return allows the fuel to COMPLETELY flow through the heads and back to the tank after the regulator. This allows proper fuel VOLUME within the heads and allows any air to pass back into the tank.

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post #8 of 17 Old 07-23-2009, 11:10 AM Thread Starter
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So does anybody have this mod on their truck ? Does it increase power, stop injector clatter, and the miss-fire resulting in rough idle and significant vibration of the engine and vehicle. Is it worth the 4 bones ?

2002 7.3 liter Excursion no mods yet... but looking foward to it.
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post #9 of 17 Old 07-23-2009, 11:27 AM
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I personally run a full regulated return as well as a bunch of other people. Injectors are much quieter now and truck became more responsive under heavy load. Also gave me the ability to dial in the fuel pressure that my truck likes best. One thing that you won't notice, but your injectors will:

Constant full fuel pressure/volume across the head. If a injector fires when it is out of fuel or very low of fuel, the plunger & barrel assembly can become damaged. The fuel acts as a buffer. Now with that being said, it will take long while for low fuel condition damage to occur. Out of fuel? Damage could be immediate.

I'm thinking about putting together a group buy to make it cheaper for everyone. I would need 10 people tho...

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post #10 of 17 Old 07-23-2009, 12:03 PM Thread Starter
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Which brand are you thinking about? And what would the discount be?

2002 7.3 liter Excursion no mods yet... but looking foward to it.
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