Stock Fuel System isn't enough... - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 38 (permalink) Old 08-01-2007, 08:56 PM Thread Starter
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Stock Fuel System isn't enough...

I finally installed an in-cab fuel pressure gauge last night. My results actually surprised me. I've got the ITP regulated return system, but for right now the rest of the system is stock. This is on the stock AD's as well.

In my 120 and 140 programs, from an idle if I floor it, my pressure drops clear down to 20psi instantly. It's around 40psi when it shifts to second then slowly climbs to 60.

When the trucks already moving if I floor it, pressure slowly drops from 65psi to around 55psi.

So I definately need to get my fuel system done becasue the mini me's go in this weekend. Just thought I'd let you guys know, maybe it's something to look at. I would've never imagined it would do that with stock injectors, but it does...
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post #2 of 38 (permalink) Old 08-01-2007, 09:24 PM
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Re: Stock Fuel System isn't enough...

I have herd of that happening before. That's what prompted me to put in a fuel pressure gauge three weeks ago.

My fuel pressure drops from 64 to 56 in both 120 and 140 with my stock AB injectors. I am going to larger sticks tomorrow. I don't trust the stock fuel systems either. Last night I picked up the regulator, fittings and hose. I am picking up the filters from Napa today for my fuel bowl delete. Now I have to select a pump for the system and git-r-done.

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post #3 of 38 (permalink) Old 08-01-2007, 09:36 PM
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Re: Stock Fuel System isn't enough...

In the past month, I've noticed my truck doing the same thing. It didn't used to do it. I've done all the usual fuel system mods (regulated return, in-tank & pre-pump mods), would a lift pump help?

02 CC 4x4. AFE stage 2, Magnaflow 4" exhaust, BTS tranny, live-tuned by Jody, AC singles, DI regulated return, Terminator HPOP, DR 4.5" lift & some other stuff...


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post #4 of 38 (permalink) Old 08-01-2007, 09:47 PM
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Re: Stock Fuel System isn't enough...

Sand nut and rockin check out the promo video in the sponsors section for Terminator Engineering.

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post #5 of 38 (permalink) Old 08-01-2007, 09:55 PM Thread Starter
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Re: Stock Fuel System isn't enough...

I'm going to be running two stock pumps parallel with each other. Hopefully that will keep up with the demands.
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post #6 of 38 (permalink) Old 08-01-2007, 09:57 PM
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Re: Stock Fuel System isn't enough...

My FASS system is holding 60 at WOT finally.

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post #7 of 38 (permalink) Old 08-01-2007, 10:47 PM Thread Starter
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Re: Stock Fuel System isn't enough...

I'm glad you got yours working right Fiona...how do you like it? Your truck has pretty much the same set-up as mine will...
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post #8 of 38 (permalink) Old 08-02-2007, 12:25 PM
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Re: Stock Fuel System isn't enough...

Quote:
Originally Posted by RockinJW View Post
I finally installed an in-cab fuel pressure gauge last night. My results actually surprised me. I've got the ITP regulated return system, but for right now the rest of the system is stock. This is on the stock AD's as well.

In my 120 and 140 programs, from an idle if I floor it, my pressure drops clear down to 20psi instantly. It's around 40psi when it shifts to second then slowly climbs to 60.

When the trucks already moving if I floor it, pressure slowly drops from 65psi to around 55psi.

So I definately need to get my fuel system done becasue the mini me's go in this weekend.
I believe the stock pump could nearly keep up if you eliminated the restrictions in the fuel system pre-pump. Use a larger diameter fuel pickup or ream out the OEM tubes and use 3/8" i.d. fuel hose or larger. I have very little restriction pre-pump and my stock pump can keep up with the fuel (2psi drop from 72 psi at idle) required with my EH'd AC injectors at WOT!
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post #9 of 38 (permalink) Old 08-02-2007, 01:25 PM
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Re: Stock Fuel System isn't enough...

Quote:
Originally Posted by RockinJW View Post
I finally installed an in-cab fuel pressure gauge last night. My results actually surprised me. I've got the ITP regulated return system, but for right now the rest of the system is stock. This is on the stock AD's as well.

In my 120 and 140 programs, from an idle if I floor it, my pressure drops clear down to 20psi instantly. It's around 40psi when it shifts to second then slowly climbs to 60.

When the trucks already moving if I floor it, pressure slowly drops from 65psi to around 55psi.

So I definately need to get my fuel system done becasue the mini me's go in this weekend. Just thought I'd let you guys know, maybe it's something to look at. I would've never imagined it would do that with stock injectors, but it does...
Just some heads up...I've been chaising a fuel pressure loss issue that suddenly hit me out of no where. I used to NOT lose pressure then all of a sudden I'm getting zero fuel pressure on BOTH guages and truck runs like ####. I replaced filters multiple times, removed Dahl completely, even changed fuel pump. This past weekend, I disconnected the hose from the dahl and blew compressed air through the pickup into the tank...problem appears to be solved. Found a bunch of gunk in my clear Dahl fuel bowl after the blow. Apparently trash was plugging up the pick-up tube. The truck runs so much better now. So I suggest reverse blowing your pick-up.

Hammer

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post #10 of 38 (permalink) Old 08-02-2007, 04:56 PM
 
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Re: Stock Fuel System isn't enough...

Quote:
Originally Posted by thehammer69 View Post
Just some heads up...I've been chaising a fuel pressure loss issue that suddenly hit me out of no where. I used to NOT lose pressure then all of a sudden I'm getting zero fuel pressure on BOTH guages and truck runs like ####. I replaced filters multiple times, removed Dahl completely, even changed fuel pump. This past weekend, I disconnected the hose from the dahl and blew compressed air through the pickup into the tank...problem appears to be solved. Found a bunch of gunk in my clear Dahl fuel bowl after the blow. Apparently trash was plugging up the pick-up tube. The truck runs so much better now. So I suggest reverse blowing your pick-up.

Hammer


Glad that worked for ya hammie!
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