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08-09-2014, 12:54 PM
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#1 |
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Registered User
 
Join Date: Apr 2010
Location: Louisiana
Posts: 970
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6.0L fuel problem?
I've got a walbro universal 255 inline fuel pump on my 6.0L LS with a Russell inline fuel filter (40 micron element). When it's idling its fine when I rap it a couple times and go above about 3,000 rpm it falls on its nose and if I don't back off the throttle, it will die. I'm wondering if the filter before the pump could be restricting it as demand increases or the pump is at fault? When it's idling I hear the pump whine, but when this occurs it gets quiet, haven't had any help yet so I can see if its loosing prime or actual power to the pump. Just wanted to see if anyone else has had an experience with a set up like this.
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08-09-2014, 02:55 PM
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#2 |
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Registered User
Join Date: Dec 2013
Location: Portland, Ore.
Posts: 348
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Re: 6.0L fuel problem?
maybe set up a mechanical fuel pressure gauge? you got any logged data? you should see the fuel trims going crazy as it leans out if youre running out of gas.
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08-09-2014, 04:30 PM
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#3 |
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Registered User
Join Date: Apr 2010
Location: Louisiana
Posts: 970
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Re: 6.0L fuel problem?
No I don't have any logged data, I'm just getting it going. I was curious if anyone may have issues with the filter maybe restricting the supply to the pump?
Thanks, Wade |
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08-09-2014, 05:43 PM
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#4 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,238
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Re: 6.0L fuel problem?
To small of fiter before pump i dont normaly run a filter before pump but after
__________________
David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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08-09-2014, 06:29 PM
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#5 |
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Truck and auto performance nut
Join Date: Feb 2007
Location: McKinney,Texas
Posts: 3,848
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Re: 6.0L fuel problem?
I run an external walbro255 with a large trick flow prefilter and the Vette post filter/reg and haven't had any fuel starvation issues. Take the prefilter out of the fuel line setup and run w/o to see if it makes a difference.
__________________
Kurt - '68 GMC short step - NIB '09 LY6 6.0L crate motor w/mods, NIB '12 crate 4L85e w/billet 3k stall Circle D, 3.73 posi 12 bolt, DynaTech f-swap headers, 3/4 drop, handling mods, etc. - my toy '72 Chevy LWB C-10 Highlander - 350/350 ps/pb/tilt/ac - not original but close '06 Chevy TrailBlazerSS - LS2/4L70e - little black hot rod SUV - my DD '18 Kia Sorento - wife's econo-driver '95 Chevy S10 - reg cab shortbed, LS, 4.3, auto... my '68's powertrain and chassis build -links broken A surprise phase - carb to efi -links broken |
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08-09-2014, 09:50 PM
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#6 |
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Registered User
Join Date: Apr 2010
Location: Louisiana
Posts: 970
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Re: 6.0L fuel problem?
Do you know what micron your trick flow pre filter is? That's the plan for Monday. Thanks to all for the responses
Wade |
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08-09-2014, 09:52 PM
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#7 |
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Registered User
Join Date: Apr 2010
Location: Louisiana
Posts: 970
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Re: 6.0L fuel problem?
I forgot to mention I have the return style fuel rail also. May even be a pressure regulator too (it is brand new).
Wade |
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08-09-2014, 11:54 PM
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#8 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: 6.0L fuel problem?
Pre filter should be around 100 micron, 40 could be too restrictive.
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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08-10-2014, 12:29 AM
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#9 |
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Registered User
Join Date: Apr 2010
Location: Louisiana
Posts: 970
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Re: 6.0L fuel problem?
Thank you for the responses, that'll be the first thing I try Monday. Second will be making sure there's no weird thing going on with fuel pump power. Then will go from there.
Wade |
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08-10-2014, 02:42 AM
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#10 |
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meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: 6.0L fuel problem?
No prefilter, 255s are cheap and usually don't die from sucking up crap....the usually die from sucking through a restriction.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING  |
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