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  #1  
Old 02-08-2008, 12:22 PM
 
Join Date: Feb 2008
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Default 1994 Sierra Fuel Filter

I have a 1994 GMC 1500 4.3L and I'm loosing power when I get up around 65-70 mph on the highway. I think it might be my fuel filter or fuel pump since I had a new engine put in it last summer. I was just wondering if anyone knows where the fuel filter is located on this model of truck. Thanks.
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  #2  
Old 02-08-2008, 02:47 PM
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Default RE: 1994 Sierra Fuel Filter

its under the truck,on the left framerail..pretty much under the driver
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  #3  
Old 02-08-2008, 03:34 PM
 
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Default RE: 1994 Sierra Fuel Filter

Ok, thanks. I figured that I would see if that needed replaced before I messed around with the fuel pump.
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  #4  
Old 02-08-2008, 05:06 PM
 
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Default RE: 1994 Sierra Fuel Filter

more then likely its either your 4.3 itself or your rear end gearing.
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89 silverado new 5.7, rebuilt700R4, RCLB Debadged, 16x8 torque 2s in LT265/75/16 BFGS, 2.73s , opened up intake, airade tb spacer, headers with dual high flow cats and 40 series dumped, audiobahn spkers with memphis 10s to a rockford amp.
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  #5  
Old 02-09-2008, 11:16 AM
 
Join Date: Feb 2008
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Default RE: 1994 Sierra Fuel Filter

I thought it might be the engine but I bought a completely new one by Jasper Engines and they supposedly fixed the problems that the 4.3 had. The engine idles good at rest and accelerates good from a stop so I kinda thought at higher speeds it might be a fuel delivery problem. but im no expert just a college student trying to fix things on my own to save money. Thanks for your help.
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  #6  
Old 02-09-2008, 06:28 PM
 
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Default RE: 1994 Sierra Fuel Filter

did the truck originally have a 4.3 in it?
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89 silverado new 5.7, rebuilt700R4, RCLB Debadged, 16x8 torque 2s in LT265/75/16 BFGS, 2.73s , opened up intake, airade tb spacer, headers with dual high flow cats and 40 series dumped, audiobahn spkers with memphis 10s to a rockford amp.
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  #7  
Old 02-09-2008, 06:45 PM
 
Join Date: Feb 2008
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Default RE: 1994 Sierra Fuel Filter

Yeah it had a 4.3 in it. It idles and perfoms ok at low speeds it just has trouble when I get up at higher speeds over 60. My mpg has dropped a lot over the last week or so also. I was driving around town today and I used a 1/4 take of gas, but i only drove 30 miles. I figure its either getting too much fuel or not enough. Im not sure though.
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Old 02-09-2008, 06:45 PM
 
 
 
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1500, 1994, 43l, 94, chevy, filter, foirum, fuel, gas, gmc, illustration, location, problem, sierra, silverado, truck

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