Fuel filter on 93 LT1
Thread Starter
Drifting
Joined: Sep 2002
Posts: 1,269
Likes: 0
From: Swanzey N. H.
Fuel filter on 93 LT1
could someone tell me where it is, how to change it, and how often it should be changed? Also, what are the symptoms of one needing to be changed. Thanks, Jim 
Le Mans Master
Joined: May 2003
Posts: 5,362
Likes: 3
From: Delray Beach FL
Should be changed every 30-45k miles. It is located under the car on the passenger side next to the cat. Make sure the car is COLD! You don't want a warm car and try to unscrew the fittings and have a nice hot cat burning your hand. BTW, you have VERY little room there. After seeing how dificult it was to get to, I just took it to the dealership and paid the extra $50 in labor for them to do it. Less yelling and screaming at the car that way and less blood loss. 
Symptoms: hesitation, loss of power, etc.
Good Luck!
Symptoms: hesitation, loss of power, etc.
Good Luck!
Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by QuikZilver
Should be changed every 30-45k miles. It is located under the car on the passenger side next to the cat. Make sure the car is COLD! You don't want a warm car and try to unscrew the fittings and have a nice hot cat burning your hand. BTW, you have VERY little room there. After seeing how dificult it was to get to, I just took it to the dealership and paid the extra $50 in labor for them to do it. Less yelling and screaming at the car that way and less blood loss.
Symptoms: hesitation, loss of power, etc.
Good Luck!
Symptoms: hesitation, loss of power, etc.
Good Luck!
Yeah if your used to playing with the exhaust like I was just drop the cat and its not too bad after that. You can pick one up at autozone.... 
Pro
Joined: Aug 2003
Posts: 528
Likes: 5
From: Kissimmee Florida
Next to the cat on the right side. Got a few burns on my hands last time I changed mine. Too impatient to let the exhaust cool. pull the fuse it was number 14 on my 96 and start the car till it starves to release as much fuel pressure as possible
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
Unless you have a way to get the car up fairly high, it might be worth going to a dealer or reputable repair shop to have the filter replaced. You'll need flare wrenches to properly grip the nuts and the space between the frame rail and the right side cat is pretty tight. It's even worse with a vert because you have to remove the X-brace to get in there.
If you do it yourself, try to get the front of the car higher than the rear so gas does not drain from the tank. As mentioned, pull the fuel pump fuse and run the motor until it sputters. You can also release fuel pressure at the Schrader valve on the pass side fuel rail if you have the tool to do it. Make sure you have a catch basin for any gas that drips and don't do this anywhere near an open flame like a gas hot water heater or furnace!!
What I found strange is that there is no mention of fuel filter replaement in the owners manual in the Maintenance and Service section. Replacing the filter is a good idea every 30-50K miles or more often if you have used a cheap brand of gas, have run the tank down to near empty (using most of the reserve), or the car seems to stumble on acceleration or runs rough. The GM filter is not too expensive at around $14 list price.
If you do it yourself, try to get the front of the car higher than the rear so gas does not drain from the tank. As mentioned, pull the fuel pump fuse and run the motor until it sputters. You can also release fuel pressure at the Schrader valve on the pass side fuel rail if you have the tool to do it. Make sure you have a catch basin for any gas that drips and don't do this anywhere near an open flame like a gas hot water heater or furnace!!
What I found strange is that there is no mention of fuel filter replaement in the owners manual in the Maintenance and Service section. Replacing the filter is a good idea every 30-50K miles or more often if you have used a cheap brand of gas, have run the tank down to near empty (using most of the reserve), or the car seems to stumble on acceleration or runs rough. The GM filter is not too expensive at around $14 list price.
Burning Brakes
Joined: Aug 2001
Posts: 1,238
Likes: 0
From: walled lake MI
i agree with c4cruiser on the flare wrenches. i originally didn't have large enough wrenches so i tried to loosen the fittings with a crescent wrench. didn't want to budge, so i got combination wrenches to do the job. got the filter off in one shot. (flare wrenches would've been even better, but not necessary IMO.)
i removed mine in a slightly unconventional way, based on suggestions by a Forum member in the past. i removed the fuel supply and return lines at the fuel rail and removed the nuts holding the fuel line in, between the fuel rail and halfway down the door. you'll have to remove the bracket holding the filter to the chassis too.
i then removed the filter fitting towards the rear of the vehicle, followed by the return line fitting near that area. when i removed the return line i quickly plugged the line on the tank end since there is nothing stopping the gas from coming out.
by doing this i could take outthe filter attached to the fuel/supply line assembly. (on my 92 the supply and return lines are attached together on a bracket. if you can figure out how to get them apart you won't need to take the return line apart.) with this assembly out, the rest should be a piece of cake.
i removed mine in a slightly unconventional way, based on suggestions by a Forum member in the past. i removed the fuel supply and return lines at the fuel rail and removed the nuts holding the fuel line in, between the fuel rail and halfway down the door. you'll have to remove the bracket holding the filter to the chassis too.
i then removed the filter fitting towards the rear of the vehicle, followed by the return line fitting near that area. when i removed the return line i quickly plugged the line on the tank end since there is nothing stopping the gas from coming out.
by doing this i could take outthe filter attached to the fuel/supply line assembly. (on my 92 the supply and return lines are attached together on a bracket. if you can figure out how to get them apart you won't need to take the return line apart.) with this assembly out, the rest should be a piece of cake.
Drifting
Joined: Nov 2002
Posts: 1,593
Likes: 0
From: Mobile AL
St. Jude Donor '05
Originally Posted by c4cruiser
What I found strange is that there is no mention of fuel filter replaement in the owners manual in the Maintenance and Service section. Replacing the filter is a good idea every 30-50K miles or more often if you have used a cheap brand of gas, have run the tank down to near empty (using most of the reserve), or the car seems to stumble on acceleration or runs rough. The GM filter is not too expensive at around $14 list price.
Dealer told me the same thing.
I changed it anyway.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
someone has been smoking crack. They must be changed.
Another detail... release the gas cap, helps to release the vacuum pressure.
There is a bracket that holds the filter in place... it's a bitch, too.
I find the best way to do it is to release the fuel lines at the injector housing first... then pull the assembly up and change the filter.
Another detail... release the gas cap, helps to release the vacuum pressure.
There is a bracket that holds the filter in place... it's a bitch, too.
I find the best way to do it is to release the fuel lines at the injector housing first... then pull the assembly up and change the filter.
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Burning Brakes
Joined: Aug 2001
Posts: 1,238
Likes: 0
From: walled lake MI
another thing to note: don't forget to put the o-rings back in with the filter. replace them if they look worn or damaged.
nothing worse than patting yourself on the back when you think you're done.... then finding an o-ring lying there on the floor. guess how i know...
nothing worse than patting yourself on the back when you think you're done.... then finding an o-ring lying there on the floor. guess how i know...
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Originally Posted by tempest
another thing to note: don't forget to put the o-rings back in with the filter. replace them if they look worn or damaged.
nothing worse than patting yourself on the back when you think you're done.... then finding an o-ring lying there on the floor. guess how i know...
nothing worse than patting yourself on the back when you think you're done.... then finding an o-ring lying there on the floor. guess how i know...
Melting Slicks
Joined: Jul 2003
Posts: 3,227
Likes: 50
From: Pomfret, CT
Finalist 2020 C4 of the Year - Unmodified
Originally Posted by bogus
There is a bracket that holds the filter in place... it's a bitch, too.
You need 3 hands! With the cat removed and the X-brace (vert) off it is a fairly easy job to change the filter! Without removing this stuff...it must be a torture chamber!
-Rick
