'94 Fuel Filter Change??
Thread Starter
Burning Brakes
Joined: Aug 2004
Posts: 771
Likes: 0
From: Washington District of Columbia
'94 Fuel Filter Change??
The FUEL FILTER has never been changed since owning my car. 
Is this an EASY / SAFE job? Where is the FUEL FILTER located on the
'94 LT1? Any advice would certainly be appreciated.
THANKS.
Is this an EASY / SAFE job? Where is the FUEL FILTER located on the
'94 LT1? Any advice would certainly be appreciated.
THANKS.
Pro
Joined: Oct 2005
Posts: 721
Likes: 1
From: Charlotte NC, behind someone going 10 under the speed limit
Depending on the miles the car has, it may not be needed. Especially running premium fuel. It's on the framerail passenger side behind the RF wheel, way up in there.
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
I recently did a change of my fuel filter. About a hour of wrenching time. A real PITA and was carefull not to get covered with fuel.
1.Disconnect the neg. of the battery.
2.Take the gas cap off.
3.On the fuel line (rear engine) there is a schrader valve. Relieve all
pressure from this valve.
4.Make sure the vette has been sitting for a bit and has cooled off.
Cooled off enough to cool the cat. converter.
5.With a set of line wrenches (four for $12.00) disconnect the old fuel
filter and reconnect the new, making sure the new fuel filter is in the
right direction.
6.Reverse the above steps, check for leaks and put the vette back
down.
1.Disconnect the neg. of the battery.
2.Take the gas cap off.
3.On the fuel line (rear engine) there is a schrader valve. Relieve all
pressure from this valve.
4.Make sure the vette has been sitting for a bit and has cooled off.
Cooled off enough to cool the cat. converter.
5.With a set of line wrenches (four for $12.00) disconnect the old fuel
filter and reconnect the new, making sure the new fuel filter is in the
right direction.
6.Reverse the above steps, check for leaks and put the vette back
down.
Pro
Joined: Feb 2006
Posts: 688
Likes: 0
From: Concord NC
Be careful when doing this. Remove any pressure from the fuel system and have a bucket and some old rags to catch the remaining gasoline. Also remove the cap to help relieve air build up 
Bad fuel filters can cause hard starting, bad idles, and poor fuel mileage. If it gets to the point where trash cannot be sifted you could be looking at engine damage. Very expensive instead of a 3 dollar 15 minute soloution
Bad fuel filters can cause hard starting, bad idles, and poor fuel mileage. If it gets to the point where trash cannot be sifted you could be looking at engine damage. Very expensive instead of a 3 dollar 15 minute soloution
Melting Slicks
Joined: Nov 2004
Posts: 2,799
Likes: 2
From: Cape Coral FL
Originally Posted by DarkBlue88
Depending on the miles the car has, it may not be needed. Especially running premium fuel. It's on the framerail passenger side behind the RF wheel, way up in there.
Try this test.... CLAMP your hand on your mouth as hard as you can and try to run around the block...that's what a clogged fuel filter does to a fuel pump! (similar thing with air filters, too!)
Melting Slicks
Joined: Nov 2005
Posts: 2,143
Likes: 489
From: Leonardtown Maryland
Do a CF search on fuel filter and you'll find some great tips. The main one I followed was to remove the passenger front fender liner. This gave me access to the upper fuel line nut. It took a little time but was well worth the effort and I was able to clean out some trash that had accumulated on the frame. Also make sure you remove the fuel line retaining clips all the way back to the rear wheel. This will give you enough room to pull the line free from the bottom filter fitting. I had my son attach a wrench to the top fitting while I broke the bottom one free. Once the line was off I used a socket and extention on the bottom of the filter while he held the top fitting. I ended up with about a quarter of a coffee can of spilled gas. Remember, disconnect the battery, no smoking, open flame, or light bulbs should be anywhere near your work area. I had plenty of rags laid around too for cushions to try and prevent any kind of sparking in case I dropped a tool.
Team Owner
Joined: Oct 2000
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From: Fort Knox, KY
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For safety's sake, pull the fuel pump fuse, start the engine, let it run until it starves for fuel, then disconnect the battery.
If you do this, you'll only have about 1/4 of a cup of gas or less in the line after relieving the pressure.
If you do this, you'll only have about 1/4 of a cup of gas or less in the line after relieving the pressure.
Melting Slicks
Joined: Nov 2005
Posts: 2,143
Likes: 489
From: Leonardtown Maryland
I'll have to go back and retry pulling the fuel pump fuse. I think I'm pretty fuse literate but maybe not. When I pulled what I thought was the pump fuse the car would not start. I don't like pulling energized fuses so I just released the pressure and didn't have too bad a time. BTW: I don't think a 1/4 cup of gasoline or a quart will make much difference if it decides to ignite under the car (yeah, it probably does). I'm exiting very quickly and grabbing a fire extinguisher!
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Team Owner
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From: Fort Knox, KY
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Originally Posted by Bigredwing
I'll have to go back and retry pulling the fuel pump fuse. I think I'm pretty fuse literate but maybe not. When I pulled what I thought was the pump fuse the car would not start. I don't like pulling energized fuses so I just released the pressure and didn't have too bad a time. BTW: I don't think a 1/4 cup of gasoline or a quart will make much difference if it decides to ignite under the car (yeah, it probably does). I'm exiting very quickly and grabbing a fire extinguisher!
Melting Slicks
Joined: Nov 2005
Posts: 2,143
Likes: 489
From: Leonardtown Maryland
Ref my post from yesterday. At least it doesn't need to be done every 3K miles. After replacing the filter myself I can't believe some people (in past threads) have let places like Jiffeylube do it. They are alot more trusting than me and I wish them continued good luck.
Drifting
Joined: May 2002
Posts: 1,562
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From: "Drive like Hell, you'll get there faster." Tucson AZ
Originally Posted by RacerX70CC
I recommend to my customers who daily drive their C4s to change fuel filters religiously every 10K miles or annually. Fuel filters are cheap... pumps and/or engines are not.
Try this test.... CLAMP your hand on your mouth as hard as you can and try to run around the block...that's what a clogged fuel filter does to a fuel pump! (similar thing with air filters, too!)
Try this test.... CLAMP your hand on your mouth as hard as you can and try to run around the block...that's what a clogged fuel filter does to a fuel pump! (similar thing with air filters, too!)
However after clamping the mouth, the hand should push up on the nose for the damage a clogged fuel filter can really do. My stepdad had to get a brand new engine in his Rally Sport Camaro because it was so backed up recently he "suffocated" and choked his engine to death. Out here my mechanic tells me one should change it twice a year for the change in seasons and gas if possible. But atleast once a year.Fuel filter's like 10 bucks. Labor even not doing it yourself is about 40-50 bucks at the most if even that and like once or twice a year at the most. Weighing the cost of a fuel pump(150-200 bucks not including labor) let alone a new engine(3-5 Grand not including labor) just isn't worth the neglect. Everyone should have fuel filter's among the top of their "what to watch for and pay attention to the most" list.
Le Mans Master
Joined: Jun 2002
Posts: 6,310
Likes: 36
From: DSM IA & Lake of the Ozarks
I did the FF on my 94 last fall. the hardest part of the job was removing the X brace (convertible). Thank God I have a 4 post lift or else I wouldn't even think about doing it laying on my back. I know, I'm spoiled.
The FF is easy, just make sure you have a good set of line wrenches for the fittings. Good advice about pulling the fuse and disconnectiong the battery. The fuel pump will pump on demand and you could get a nasty surprise.
I did mine at 50k miles and I did notice a little better performance afterward. The nest change will be at 75k miles fwiw.
The FF is easy, just make sure you have a good set of line wrenches for the fittings. Good advice about pulling the fuse and disconnectiong the battery. The fuel pump will pump on demand and you could get a nasty surprise.
I did mine at 50k miles and I did notice a little better performance afterward. The nest change will be at 75k miles fwiw.
Large Impressive Member
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by DarkBlue88
Depending on the miles the car has, it may not be needed. Especially running premium fuel. It's on the framerail passenger side behind the RF wheel, way up in there.
Advanced
Joined: Apr 2019
Posts: 77
Likes: 2
94 fuel filter change / location
I am new to this thread but have a question. Have read several different posts and viewed several videos as to location of the fuel filter and the "how to". After crawling under my 94 and checking everywhere as to where it is suppose to be I can not locate the filter. Crazy question, but do all 94s have a fuel filter? Thanks Bob
Drifting
Joined: Jun 2004
Posts: 1,305
Likes: 516
From: Gilbert, Arizona Currently Own: 1998 Coupe YouTube: My Corvette Life
Not sure if a 94 has it in the same location, but I did a video showing where and how to change it. Once you have the car jacked up, it literally takes 2 minutes.
Last edited by Chris Draper; Oct 15, 2021 at 12:48 PM.
Advanced
Joined: Apr 2019
Posts: 77
Likes: 2
'94 Fuel Filter Change
I agree, it should be an easy job. But my problem is that I have looked ever where it is suppose to be located and can find the fuel filter. For the 1994 year are there any exceptions re: location or maybe select 94s after/before a certain build date did not have one? Thanks again , Bob
Drifting
Joined: Jun 2004
Posts: 1,305
Likes: 516
From: Gilbert, Arizona Currently Own: 1998 Coupe YouTube: My Corvette Life
I agree, it should be an easy job. But my problem is that I have looked ever where it is suppose to be located and can find the fuel filter. For the 1994 year are there any exceptions re: location or maybe select 94s after/before a certain build date did not have one? Thanks again , Bob
If it’s not there, follow the fuel line from the tank forward. Maybe someone relocated it.
Advanced
Joined: Apr 2019
Posts: 77
Likes: 2
'94 Fuel Filter Change
Check the frame rail against the forward, sloped surface of the passenger foot well. If you were sitting in the passenger seat and put your right foot where the gas pedal should be, you would be right on top of it.
If it’s not there, follow the fuel line from the tank forward. Maybe someone relocated it.
If it’s not there, follow the fuel line from the tank forward. Maybe someone relocated it.
Advanced
Joined: Apr 2019
Posts: 77
Likes: 2