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11-06-2008, 02:27 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
There should definately be a filter in line somewhere..... keep in mind if you are having a fueling issue that driving aggressive will exponentially increase your change of melting a piston due to leaning out. Until you figure out your issue I would strongly suggest driving it easy.
__________________
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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11-06-2008, 04:03 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
There is a fuel filter mounted to the front of the fuel tank on the drivers side. At least thats where it is on my 03.
__________________
"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, 04:38 PM
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Hummer Expert
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Join Date: Jun 2008
Location: New York
Posts: 524
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Re: Fuel Filters? Loss of power...supercharger
GM lists FF864 as the only fuel filter for a 2003 and 2004 H2. It's the in tank unit and they don't list any other fuel filter at all. They don't even list one for 2005 on up. I was on the line with my Hummer dealership this morning ordering a lug nut and the parts guy said there is a special tool you can order from GM for changing the in tank filter more easily.
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Hummer, like nothing else
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11-06-2008, 08:14 PM
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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
They changed the fuel system in the later H2's. I remember when installing the SC the parts were different from newer to the older. Im sure im on the newer fuel system.
Yea, i was figuring the sock was just to stop large debris....cant imagine that would be the only filter.
Im not running real lean, im figuring this since the thing doesnt ping....and I run 85 or 87 octane (Always have).
The real question here is, would I notice a power loss if i had a clugged injector or would I notice lean behavior such as pinging...? Im sure someone on here thats ran lean can let me know the answer.
--John
__________________
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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11-06-2008, 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
__________________
"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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