Question about 1994 Cadillac Eldorado

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How do I relieve the fuel system pressure in order to replace the fuel filter

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That is only a precaution that is widely overlooked. You can replace the filter as is, but there might be a squirt of fuel. If you must know, the pressure port is on top of the engine on the fuel rail. There is a cap on it and if you use a small screwdriver and a rag over top, then push down gently on the valve inside that looks like a valve stem, the fuel should come out relieving the pressure.

Posted on Sep 27, 2009

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Posted on Jan 02, 2017

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SOURCE: car won't run after changing fuel filter

try to clean up your gas tank .it also can be a bad Oxygen sensor Fuel filter not so expansive around 30 40 bucks and might save you the hassle.... by it being the cause.

Posted on Jun 26, 2008

  • 667 Answers

SOURCE: how to relieve the pressure on the fuel system in

look for the fuel rail, it should be the chrome pipe that runs between all of the injectors, there should be a plastic cap that you can unscrew and under it should be the pressure check port, it looks like a regular tire valve, with the ignition key OFF push the valve in and the fuel pressure will be released, fuel will also be released so be sure you have a rag handy, and don't look into the valve when you push it

Posted on Mar 20, 2009

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SOURCE: relieving fuel pressure on 2005 Chevrolet Tahoe

Pull out the fuel pump relay and start the engine, let it run till it goes dead. fuel pressure relieved!

Posted on May 05, 2009

  • 2007 Answers

SOURCE: i am trying to find the fuel pump fuse on my 1989 delta 88

There will only be pressure for couple of seconds if your key is off. There is no power running to the pump unless your key is turned to "on".

Posted on Jun 06, 2009

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SOURCE: Where is relief switch to relieve pressure in fuel

It should be under hood on fuel line rail top of engine, also before starting pull fuse for fuel pump. or unplug connector by tank,there may be more then one fuel filter, i have seen one like a water separator on frame rail front drivers side, that my just be for the ones coming north? PS. i avoid using incandescent lights . and system holds pressure for several hours, be safe, and have a good day . if this help please let us know. Thank you.

Posted on Apr 01, 2010

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How do you replace a fuel filter on a 1999 Pontiac Montana?

Here's a link showing you how to replace your fuel filter. Repair Guides Routine Maintenance Fuel Filter AutoZone com

Relieving Fuel System Pressure

  1. Disconnect the negative battery terminal to avoid possible fuel discharge if an accidental attempt is made to start the engine.
  2. Loosen the fuel filler cap to relieve tank vapor pressure.
  3. Connect a suitable fuel gauge to the fuel pressure connection. Wrap a shop towel around the fitting while connecting the gauge to avoid spillage.
  4. Install the bleed hose into an approved container and open the valve to bleed the system pressure. Fuel connections are now safe for servicing.
  5. Drain any fuel remaining in the gauge into an approved container.

Oct 04, 2016 | Pontiac Cars & Trucks

1 Answer

How do I know if I need to replace the fuel pump on a 2000 jeep grand Cherokee laredo 4.0

Hi Rebecca,what is happening to think your fuel pump is bad,it may be a clogged fuel filter,usually change it first and see if it does better.Here's a link to replace the fuel filter. Repair Guides Fuel Filter Removal Installation AutoZone com First you must relieve the fuel pressure,here's how. Repair Guides Relieving Fuel System Pressure Relieving Fuel System... Here's how to replace the fuel pump. Repair Guides Gasoline Fuel Injection Fuel Pump AutoZone com Also check your air filter too.Also your fuel injectors could be dirty and need cleaning,let me know what all it's doing so we can pin point the problem,k.

Oct 12, 2014 | Cars & Trucks

1 Answer

Truck wont start . suspect fuel pump or filter, will take off bed to replace pump rather than drop fuel tank (im doing this in my front yard and no ramps) but where is fuel filter on this truck?

Fuel Filter Removal & Installation To Remove:
  1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section
  2. Disconnect the negative battery cable
  3. Relieve the fuel system pressure (See: Fuel Pressure Relieving)
  4. Raise the vehicle Fuel filter-4.8L, 5.3L, 6.0L engines 9308kg55.gif

  5. Clean all the fuel filter connections and the surrounding areas before disconnecting the fuel lines in order to avoid possible contamination of the fuel system
  6. Disconnect the threaded fittings from the fuel filter
  7. Cap the fuel lines in order to prevent possible fuel system contamination
  8. Slide the fuel filter from the bracket
  9. Inspect the fuel line O-rings for cuts, nicks, swelling, or distortion
  10. Replace the O-rings if necessary.
To Install:
  1. Slide the fuel filter into the bracket
  2. Remove the caps from the fuel lines
  3. Connect the threaded fittings to the fuel filter and tighten the fittings
    • Torque to: 18 ft. lbs. (25 Nm)
  4. Tighten the fuel filter bracket bolt
    • Torque to: 106 inch lbs. (12 Nm)
  5. Lower the vehicle
  6. Tighten the fuel filler cap
  7. Connect the negative battery cable
  8. Use the following procedure in order to inspect for leaks:
    • Turn on the ignition, with the engine off, for 2 seconds
    • Turn off the ignition for 10 seconds
    • Turn on the ignition, with the engine off
    • Inspect for fuel leaks
  9. Install the engine sight shield
  10. Test drive the vehicle to confirm the repairs
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Jan 29, 2011 | 2001 Chevrolet Silverado

1 Answer

Honda Civic Coupe. Year 2000 1.6. How can I depressurize the fuel system easily to change the fuel filter situated in the engine compartment.


IMPORTANT: Do not skip the fuel system pressure release step. Injury and other damage can result!
Safety Step! Relieving Fuel System Pressure
· allow engine to cool
· relieve fuel system pressure
· put on your eye protection
Before you begin the job of replacing your fuel filter, you must relieve the pressure in your fuel system. A fuel injection system operates under very high pressure. If you don't release this pressure before you start unscrewing fuel lines the result can be explosive. Do this before you attempt to change the fuel filter.
To release the pressure in your fuel lines (and fuel filter) you'll need to locate the fuel pump fuse in the fuse box. If you don't have a fuel pump fuse, find the relay that operates the fuel pump. Once you've found the fuel pump fuse or relay, start the car. With the engine running, pull the fuse or relay out. If you pulled the right one, the engine will quickly die. Since it's using all of the pressurized fuel in the system, the fuel lines won't be pressurized when you crack the fittings on your fuel filter.
Now that you've relieved the fuel pressure you can remove the old fuel filter.
If you didn't do this yet, you must go to the previous step and do it. Very dangerous!

Best regards.

Oct 28, 2010 | 2000 Honda Civic

1 Answer


Pressure Relief
Special Tool(s) EFI/CFI Fuel Pressure Gauge
310-012 (T80L-9974-B) swn~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Do not smoke or carry lighted tobacco or open flame of any type when working on or near any fuel related component. Highly flammable mixtures are always present and may be ignited, resulting in possible personal injury.
swn~us~en~file=ani_caut.gif~gen~ref.gif WARNING: Fuel in the fuel system remains under high pressure even when the engine is not running. Before servicing or disconnecting any of the fuel lines or fuel system components, the fuel system pressure must be relieved to prevent accidental spraying of fuel, causing personal injury or a fire hazard.
  1. Remove the schrader valve cap and attach the EFI/CFI Fuel Pressure Gauge.
  2. e5e3ebf.gif
    NOTE: Open the manual valve slowly to relieve the system pressure. This may drain fuel from the system. Place fuel in a suitable container.
    Open the manual valve on the EFI/CFI Fuel Pressure Gauge slowly and relieve the fuel pressure. 9deacdd.gif
    Filter Removal
    1. Relieve the fuel pressure; refer to Above.
    1. Remove the fuel filter (9155).
      1. Disconnect the fuel lines
      1. Remove the fuel filter from the fuel filter support.
      2. b717c63.gif
      1. Push Connect Fittings
        Special Tool(s) Fuel Line Disconnect Tool
        310-S039 (T90T-9550-S) 4bbcf9e.gif
        1. Relieve the fuel pressure; refer to Pressure Relief in this section.
        1. Disconnect the safety clip from the male hose.
        2. Install the fuel line disconnect tool and push into the fitting. f0af03c.gif
          Install the fuel line disconnect tool and push into the fitting. 367328f.gifSeparate the fittings.
          • Inspect for damage.
          • Clean the fittings.
          • 3beef33.gif

Sep 02, 2010 | 1998 Ford Explorer

1 Answer

How do I change the fuel filter

Fuel Filter REPLACEMENT It is recommended that the fuel filter be replaced periodically. The filter is of one-piece construction and cannot be cleaned, so it must be replaced. Carbureted Engines Fig. 1: View of the fuel filter used on carbureted engines 85551036.gif
  1. Remove the air cleaner.
  2. Loosen and remove the fuel tube from the filter.
  3. Unscrew the filter from the carburetor.
  4. Apply Loctite® or equivalent to the external threads of the new filter and screw the filter into the carburetor.
  5. Hand-start the tube nut into the fuel filter. While holding the filter with a wrench to prevent it from turning, tighten the fuel line tube nut.
  6. Start the engine and check for fuel leaks.
  7. Replace the air cleaner.
Fuel Injected Engines Fig. 2: Exploded view of the fuel filter mounting on fuel injected engines 85551037.gif
Fig. 3: Use a hand vacuum pump to relieve the fuel system pressure 85551038.gif Fig. 4: Exploded view of the fuel inertia cut-off switch and its location 85551039.gif
Fig. 5: Exploded view of the 5⁄16 in. hairpin clip type quick-disconnect coupling 85551040.gif
Fig. 6: Connecting and disconnecting the garter spring type quick-disconnect couplings 85551041.gif
Remove the fuel filter mounting bracket retaining nuts . . . 89681p04.jpg. . . then loosen the filter retaining clamp and slide the bracket assembly back . . . 89681p05.jpg. . . to provide better access to the push connect fittings (arrows) 89681p06.jpgWith a rag positioned to catch any spilled fuel, disengage the retainer clip and remove the line 89681p07.jpg NOTE: The inline reservoir type fuel filter should last the left of the vehicle under normal driving conditions. If the filter does need to be replaced, proceed as follows: CAUTION
If the fuel filter is being serviced with the rear of the vehicle higher than the front, or if the tank is pressurized, fuel leakage or siphoning from the tank fuel lines could occur. To prevent this condition, maintain the vehicle front end at or above the level of the rear of vehicle. Also, relieve tank pressure by loosening the fuel fill cap. The cap should be tightened after pressure is relieved.
  1. Shut the engine OFF. Depressurize the fuel system as follows: On the 2.3L EFI engine, a valve is located on the throttle body for this purpose. The valve can be located by removing the air cleaner. On the 2.9L EFI engine use the following steps:
    • Remove the gas cap.
    • Disconnect the vacuum hose from the pressure regulator located on the engine fuel rail.
    • Using a hand vacuum pump, apply approximately 25 in. Hg pressure to the pressure regulator.
    Fuel pressure will be released into the fuel tank through the fuel return hose. On most EFI engines the fuel pressure can be relieved as follows. Use special tool T80L-9974-B or equivalent attached to the pressure measuring port on the engine fuel rail. Direct the drain hose to a suitable container and depress the pressure relief button. An alternate method of relieving the fuel system pressure is to disconnect the electrical connector from the inertia switch and crank the engine for about 15–30 seconds until it runs out of fuel and dies.
  2. Raise and support the vehicle safely.
  3. Remove the push connect fittings at both ends of fuel filter. Install new retainer clips in each push connect fitting.
  4. Remove the filter from the bracket by loosening the filter retaining clamp enough to allow the filter to pass through. NOTE: The flow arrow direction should be positioned as installed in the bracket to ensure proper flow of fuel through the replacement filter.
  5. Install the filter in the bracket, ensuring proper direction of flow as noted by arrow. Tighten clamp to 15–25 inch lbs. (1.7–2.8 Nm).
  6. Install the push connect fittings at both ends of the filter.
  7. Lower the vehicle.
  8. Start the engine and check for leaks. Clean all dirt and/or grease from the fuel filter fittings. "Quick Connect'' fittings are used on models equipped with a pressurized fuel system. These fittings must be disconnected using the proper procedure or the fittings may be damaged. The fuel filter uses a "hairpin'' clip retainer. Spread the two hairpin clip legs about 1⁄8 in. (3mm) each to disengage it from the fitting, then pull the clip outward. Use finger pressure only; do not use any tools. Push the quick connect fittings onto the filter ends. Ford recommends that the retaining clips be replaced whenever removed. The fuel tubes used on these fuel systems are manufactured in 5⁄16 in. and 3⁄8 in. diameters. Each fuel tube takes a different size hairpin clip, so keep this in mind when purchasing new clips. A click will be heard when the hairpin clip snaps into its proper position. Pull on the lines with moderate pressure to ensure proper connection. Start the engine and check for fuel leaks. If the inertia switch (reset switch) was disconnected to relieve the fuel system pressure, cycle the ignition switch from the OFF to ON position several times to re-charge the fuel system before attempting to start the engine. prev.gif next.gif

Aug 13, 2010 | 1987 Ford Bronco II

1 Answer

How do you change a fuel filter

The fuel filter is located on the left frame rail midpoint near the transmission crossover,relieveing fuel pressure on these can be a bit tough,what i do is put a drain bucket under the filter and crack open the fitting enough so the fuel will begin to come out,just let it drain into the bucket until pressure is gone,remove the filter. The fuel filter is located underneath the vehicle on the driver side, almost under the driver seat. You can't miss it, just follow the gas lines coming from the fuel tank.
The sending unit is mostly plastic bt the pump itself is metal as well as the rods and springs that connect the pump/filter assembly to the top part that sits flush with the top of the tank and where the hose connections are (it's spring loaded to hold the pump against the bottom of the tank). The detailed procedure to remove filter is as follows:-- WARNING: Relieve the fuel system pressure before servicing fuel system components In order to reduce the risk of fire and personal Injury. After relieving the system pressure, a small amount of fuel may be released when servicing the fuel lines or connections. In order to reduce the chance of personal Injury, cover the regulator and the fuel line fittings with a shop towel before disconnecting. This will catch any fuel that may leak out. Place the towel In an approved container when the disconnection Is complete .
Disconnect the negative battery cable in order to avoid possible fuel discharge if an accidental attempt is made to start the engine.
Loosen the fuel filler cap in order to relieve the tank vapor pressure.
Connect the gauge J 34730-1A or the equivalent to the fuel pressure connection.
Wrap a shop towel around the fitting while connecting the gauge in order to avoid spillage.
Install the bleed hose into an approved container and open valve in order to bleed the system pressure. The fuel connections are now safe for servicing.
Drain any fuel remaining in gauge into an approved container.

If you don't have a use of the tool then use a shop rag and put over the valve stem in the pressure rail and use a pencil to put the valve in to relieve the pressure. the shop towels will absorb the fuel.
The pressure is now released as long as you do not turn the key on. There will be a little fuel coming from the lines from the fuel filter.

Your vehicle could have either a canister type filter which in that case you just put a new canister filter on. If you have a filter cartridge then the take the filter cartridge out and lube the o-ring with some oil and install. Turn the filter canister 3/4 of a turn after contacting the gasket.
Thanks. keep updated for any more can rate this solution and show your appreciation.

Jun 12, 2010 | 2006 GMC Yukon

1 Answer

How can I replace the fuel filter in my chevrotet cavalier 2001?

The fuel filter is located on the fuel feed pipe, between the fuel pump and the fuel injectors.
  1. Relieve the fuel system pressure.
  2. Raise the vehicle.
  3. Use a back-up wrench in order to disconnect the fuel filter fitting.
  4. Disconnect the quick connect fitting from the fuel filter by squeezing the plastic tabs .
  5. Remove the fuel filter.
  6. Install new filter and make connections of fuel lines
  7. Check for fuel leaks after installation is complete.

Oct 24, 2009 | 2001 Chevrolet Cavalier

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