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11-06-2008, 09:50 PM
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Hummer Veteran
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Join Date: Mar 2005
Location: East Setauket
Posts: 134
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Re: Fuel Filters? Loss of power...supercharger
Thats wierd cause i just replaced mine not too long ago. Heres a picture you can only see one of the lines cause both lines run right behind one another. This is the part number i got: AHG9344

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"A clear conscience is usually the sign of a bad memory."
03 White H2
12 HID lights, factory lightbar, custom light bar for brush guard, OEM luggage rack, k&n intake, Gran MAF, 37" Toyo M/T's, 17x12 weld racing wheels, predator programer, Dynomax 4" catback exhaust,
02 10th Anniversary H1 #44 Will be missed 
94 Custom pearl white H1(work in progress)
Too many mods to list
06 kawasaki stx-15f
02 yamaha superjet
02 polaris scrambler 500
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11-06-2008, 11:17 PM
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Hummer Veteran
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Join Date: Feb 2006
Location: Charlotte, NC
Posts: 181
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Re: Fuel Filters? Loss of power...supercharger
Do you have any guages? Wideband, fuel pressure, boost? Could be alot of things but I would guess that if you have good pressure then thats not a fuel problem. Better gas will usually equal more timing/power. Any belt dust? Maybe slipping belt, spinning crank, vacuum leak, etc. Have you thrown any codes?
Alot of the fuel filters are located above the crossmember under the center of the truck. Mine is atleast.
Tim
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11-07-2008, 12:19 AM
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Hummer Professional
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Join Date: Feb 2003
Location: Palm Desert, CA
Posts: 470
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Re: Fuel Filters? Loss of power...supercharger
Try going to premium fuel (which is recommended with the SC) and use an injector cleaner like Techron. I had the same problem and it turned out to be bad fuel. Now I only run Chevron or Mobil premium.
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2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Dynatech long tube headers, catback,18\" Ambush w/Toyo MT\'s,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo\'s, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev Suburban Blown
1970 Trans Am balanced, blueprinted, ceramic headers, etc.
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11-07-2008, 01:20 AM
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Hummer Professional
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Join Date: Feb 2006
Posts: 368
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Re: Fuel Filters? Loss of power...supercharger
Yea, true....maybe because of the 85/87 ive been running its been backing way off on the timing causing a power loss., since when i first installed the SC i ran 91 and it ran good enough to kill a transmission in a few weeks.
Next tank ill run preminum and see what happens.
--John
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2006 Hummer H2 Lux Series
www.JohnHasMoreFun.com
1/4 Mile 15.29@91.34mph
Mods:
Magnusun Radix Supercharger!!!
Switch to allow full Nav Controls while moving
Warn 9.5 Winch
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11-07-2008, 06:58 PM
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Hummer Professional
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Join Date: Aug 2007
Location: Bartlett, Illinois
Posts: 486
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Re: Fuel Filters? Loss of power...supercharger
Running a supercharger on 87 octane in my opinion is just crazy, even conservatively tuned its still a bad idea. You have all that money invested why not spend another few bucks per tank and have the piece of mind.
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2008 H2 SUV Luxury: Solar Flare ext/Black int
SOLD 2006 H2 SUV Luxury: Pewter ext/Black int.
2002 Corvette Z06 Blue/Ebony (light mods)
1/4 mile: 11.661@118.86
2013 Audi S4
2002 Yamaha YZF R1 Blue/White
1/4 mile: 10.51@136
2006 Sea-Doo RXP (70.6mph GPS)
2005 Sea-Doo RXT
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11-07-2008, 10:55 PM
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Hummer Expert
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Join Date: May 2007
Location: PHOENIX AZ
Posts: 681
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Re: Fuel Filters? Loss of power...supercharger
you don't run cheap gas in a supercharged or turbo charged vehicle ,step up to 91 or 92 octane. throw a can of Seafoam in the gas tank and it will clean the injestors and remove carbon deposits,nothing I have ever used works as well as Seafoam .you might consider a Walbro fuel pump ,it will deliver all the fuel you need .
__________________
A government big enough to
give you everything you want, is
strong enough to take everything
you have.
-- Thomas Jefferson
Last edited by IRA51 : 11-07-2008 at 11:07 PM.
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11-07-2008, 11:05 PM
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Hummer Professional
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Join Date: Aug 2007
Location: Bartlett, Illinois
Posts: 486
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Re: Fuel Filters? Loss of power...supercharger
I forgot to add also that just because you dont hear it pinging that does not mean that your not running too lean. If the premium fuel with higher octane does not do the trick I would suggest getting a fuel pressure gauge hooked up to see if your getting pressure under throttle load, if pressure is good the next step I would take is getting a wideband A/F on that thing and see what the true air/fuel ratio is, with a forced induction set up I would be scared of anything in the neighborhood of 13:1 or higher. Another thing you may want to do if its not done already is get a plug that one heat range cooler along with tightening up the gap by .010
Im not just giving you this info blind..... I have owned a couple of supercharged cars along with having alot of nitrous experience, under artificial asperation you want to be on the rich side vs. lean for safety.
__________________
2008 H2 SUV Luxury: Solar Flare ext/Black int
SOLD 2006 H2 SUV Luxury: Pewter ext/Black int.
2002 Corvette Z06 Blue/Ebony (light mods)
1/4 mile: 11.661@118.86
2013 Audi S4
2002 Yamaha YZF R1 Blue/White
1/4 mile: 10.51@136
2006 Sea-Doo RXP (70.6mph GPS)
2005 Sea-Doo RXT
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11-07-2008, 11:12 PM
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Hummer Expert
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Join Date: May 2007
Location: PHOENIX AZ
Posts: 681
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Re: Fuel Filters? Loss of power...supercharger
GSS340 Hi Flow Fuel Pump
(Click to enlarge) Product: #Walbro GSS340 - GSS340 Hi Flow Fuel Pump
Price: $119.99
Category: Fuel & Cooling
Availability: In Stock
Manufacturer: Walbro
Weight: 2.00
Great in tank pump for forced induction
The Walbro high output in-tank electric fuel pumps are available in flow ratings of 255 liters of fuel per hour. These particular pumps flow significantly more fuel at higher pressure. For example, at 80 PSI the standard 255 lph pump will flow around 132 liters (35 gallons) per hour. At that same 80 PSI the equivalent HP (high pressure) fuel pump will flow over 210 liters (50 gallons) per hour.
Walbro in-tank electric fuel pumps utilize a proven gerotor design. The outside dimensions, however, are compact enough to fit existing hanger assemblies, without modification. Coverage includes most popular Acura and Honda, and many other Import applications.
These are complete fuel pump kits and include all drop parts, accessories and installation instructions. Also included is an inlet filter that meets or exceeds original equipment specifications and provides improved filtration and durability.
http://www.gonicd.com/intankinstall/intankpumpinstall
__________________
A government big enough to
give you everything you want, is
strong enough to take everything
you have.
-- Thomas Jefferson
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