Duramax Diesels Forum Truck of the Week
  #16  
Old 08-20-2018, 02:39 PM
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Quote:
Originally Posted by NC-smokinlmm View Post
Collapsed fuel line...
Interesting thought, most of the line on the Kodiak runs in the frame and is metal line ill look around for the soft line and try and see, the truck is driving fine drove it today.
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  #17  
Old 08-20-2018, 04:05 PM
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They have 2 piece soft lines so the inner line can collapse and it look visually fine. The lines on my LMM did this, I ran all new fuel lines and truck was much happier...
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  #18  
Old 08-20-2018, 05:30 PM
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When you installed the FASS filter delete bowl, did you remove the check ball?
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  #19  
Old 08-20-2018, 06:59 PM
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Quote:
Originally Posted by JoshH View Post
When you installed the FASS filter delete bowl, did you remove the check ball?
Yes, and when i put the new filter head in with the oem filter I didn't change anything. I installed it as is, and just put in an adapter at the air bleed screw to go to the sending unit.
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2007 Kodiak C4500 (quadcab)
Efi Live, FASS 150, Custom Exhaust, Bunch of Gauges, Tahoe Headlights, Custom Stereo,National Air Seats, Flat bed, Profab Y Bridge, ARP Studs, 12x12x2 Oil cooler, BAT Sandwich adapter, 12x12x2 trans cooler, Oil Pressure/Temp Gauges, Belly mount Onan 5500w Generator. LDS 30% Overs.

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  #20  
Old 08-20-2018, 07:20 PM
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Are you sure you aren’t hooking up the hoses backward?
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  #21  
Old 08-21-2018, 03:28 AM
jlawles2 jlawles2 is offline
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I wonder if you have a bad ground, bad sending unit, or bad gauge? Did you try a mechanical gauge to verify fuel pressure?
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  #22  
Old 08-21-2018, 03:39 PM
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Quote:
Originally Posted by JoshH View Post
Are you sure you arenít hooking up the hoses backward?
This.. ive seen it alot
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  #23  
Old 08-23-2018, 11:30 AM
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Nothing seems to be on backwards, everything was working about 6 months ago when just going down the road the electronic gauge started reading really high, then all over the place and finally just went to crap so I thought. Ive tested with a mechanical gauge to prove the autometer is correct.

1. Replaced the spring in the return on the FASS with a shorter New Spring = Zero Pressure
2. Took original spring and stretched it out = Pressure randomly 5psi, only when engine is running but, without any type of engine load. Once load is added it drops to 0psi
3. Replaced the check ball in the return, and the pump motor and seals.
4. Replaced the feed line from the tank to the pump
5. Replaced the filter head with a new head, and oem filter

Still no pressure. Thoughts are now the CP3? Returning fuel?

Truck seems to run great, and if I i pump up the primer on the filter head pressure comes up on the gauge. WTF?
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2007 Kodiak C4500 (quadcab)
Efi Live, FASS 150, Custom Exhaust, Bunch of Gauges, Tahoe Headlights, Custom Stereo,National Air Seats, Flat bed, Profab Y Bridge, ARP Studs, 12x12x2 Oil cooler, BAT Sandwich adapter, 12x12x2 trans cooler, Oil Pressure/Temp Gauges, Belly mount Onan 5500w Generator. LDS 30% Overs.

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Last edited by stibuilder; 08-23-2018 at 11:38 AM.
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  #24  
Old 08-23-2018, 11:59 AM
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The next thing I would do is move the AutoMeter sending unit to the FASS and see if it is making pressure at the FASS. If you are getting pressure at the FASS but not at the filter, you have a restriction in the line somewhere between the FASS and the factory filter head.
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  #25  
Old 08-27-2018, 03:28 PM
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I put a manual gauge on the Lift pump today and turned the key and got 8psi, the filter housing was zero, looking at replacing the last run of OEM fuel line that could be causing an issue.
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2007 Kodiak C4500 (quadcab)
Efi Live, FASS 150, Custom Exhaust, Bunch of Gauges, Tahoe Headlights, Custom Stereo,National Air Seats, Flat bed, Profab Y Bridge, ARP Studs, 12x12x2 Oil cooler, BAT Sandwich adapter, 12x12x2 trans cooler, Oil Pressure/Temp Gauges, Belly mount Onan 5500w Generator. LDS 30% Overs.

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  #26  
Old 09-04-2018, 10:38 AM
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So the truck set a P0087 code this weekend after driving is and letting it sit for 30min I went to leave it almost died came back and tossed the code. I was only 5 blocks way from home, it made under its own power. This sounds like a fuel issue on the low pressure side also.
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2007 Kodiak C4500 (quadcab)
Efi Live, FASS 150, Custom Exhaust, Bunch of Gauges, Tahoe Headlights, Custom Stereo,National Air Seats, Flat bed, Profab Y Bridge, ARP Studs, 12x12x2 Oil cooler, BAT Sandwich adapter, 12x12x2 trans cooler, Oil Pressure/Temp Gauges, Belly mount Onan 5500w Generator. LDS 30% Overs.

28FT Intech Car trailer

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