Tip & How-To about Audi Quattro

Car-fuel tip

Keep the fuel tank above half mark in city driving conditions so that a proper pressure is maintained to keep the fuel lines always clean and rust free.

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Where fuel filter located on a Mazda b4000 1994?


1994, most cars its in front of fuel tank
did you even look first? there?
some cars its on fire wall, (old cars)
following the fuel line, always works on all cars.
gas or diesel.
my comments are all gas (petrol)

now ill post the 1st line in the FSM (safety)_
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. cap should be tightened after pressure is relieved.


is car stalled.> or is this a service , question, tune up.?

i logged in and bingo there it is by gas tank..
sure you didnt want to look and want us to .sure.

Jul 18, 2014 | Mazda Cars & Trucks

1 Answer

My 1994 Dodge Spirit can only use gas from the top half af the tank. is ther a problem with the pick up tube?


There is no pick-up line in the Spirit: the pump is articulated to swing up and down to follow the fuel level. If stuck, it could be. But another possibility is a clogged inlet mesh, so that when the fuel level drops, the pump cannot continue suctioning. One thing is for sure: one of the very few thing that the excellently reliable Spirit and Acclaim models that can be troublesome, is the fuel pump. As a general recommendation on these cars (and all of the same platform, like the Shadow and Le-Baron) is to never let the car run on the last part of the tank, try to keep it always above 1/4, because the fuel pump is sensitive to low suction conditions. The tank is removed letting it go down to the floor. Take the advantage and perform a full tank cleaning and washing (water and detergent), complete flushing with a Karcher or any other high pressure washer, and finish drying it with a hair drier blowing into each of the two large openings. After meny miles and years, the fuel pump could be replaced, and the old one kept as spare. The new one should endure for 10 more years!

Mar 31, 2012 | 1994 Dodge Spirit

2 Answers

gas tank troubleshooting


A mechanical pump pulls fuel from the tank and pressurizes it on the carb side. This makes any small rust holes in the fuel line nearly impossible to find (with injection the line from the tank is pressurized and any hole no matter how small will spray....a mechanical pump will draw air into the hole instead. You can check it for leaks by removing the end at the tank and blocking it off, then disconnecting it from the pump and attaching a flowing siphon hose to it. any leaks will then drip.
The fuel pickup in the tank has a fine mesh screen on it. You can either blow it off the end of the pickup tube by applying high pressure air to the line while it's disconnected from the pump, or by dropping the tank and cleaning it. As long as you are using a good filter on the line it won't hurt anything but if it does work you can consider removing the tank and cleaning it.
Your fuel pressure should be between 5 and 7psi. Good idea to run some of your fuel into a clear glass jar and check it for water.
Have you checked the intake gasket for leaks? While running, spray carb cleaner where the manifold and head join. If the idle changes substantially, you have a leak. I'd also check actual engine vacuum...you should have about 19 inches of vacuum at idle.
Last, your timing chain may also be worn. At times the chain will ride up on the cam gear and alter the cam timing. I would definitely keep that for last but keep it in mind anyway.
If combustion is good in all cylinders your plugs should be coffee coloured on the electrode porcelan. Black, or oil fouled is not good.
White is questionable but as long as they aren't blistered they should be ok like that. Last thought is that rebuilt carbs are not always done up right...building is becoming a lost art. Though yours is simple it still needs to be set up correctly or it may not work.

Apr 05, 2010 | 1988 Jeep Wrangler

1 Answer

1995 Nissan 240SX: Is there a way to check the output pressure from the fuel pump or check its whether it is function properly without taking the pump out of the fuel tank?


well check your fuel pressure with a tester which can be found in most auto places. Its pretty easy to use. If your running a ka i think the two fuel lines located above the intake manifold should be good enough. This is bc if im not mistaken you need to keep it inside the tank to create pressure thats why when you get gas you always hear that hissing sound when you remove the gas cap

Mar 28, 2009 | 1995 Nissan 240SX

2 Answers

changing fuel filter on 2002 Mazda pickup


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. Mazda 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.
0900c15280192eed.jpgRemove the "hairpin" clip retainers to access the fuel line fittingsThe inline reservoir type fuel filter should last the life of the vehicle under normal driving conditions. If the filter does need to be replaced, proceed as follows:
CAUTIONIf 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. cap should be tightened after pressure is relieved.
  1. Shut the engine off. Depressurize the fuel system.
  2. Raise and support the vehicle safely.
  3. Detach the fuel lines from both ends of the fuel filter by disengaging both push connect fittings. Install new retainer clips in each push connect fitting.
  4. Note which way the flow direction arrow points on the old filter.
  5. Remove the filter from the bracket by loosening the filter retaining clamp enough to allow the filter to pass through.
The flow direction arrow should be positioned as installed in the bracket to ensure proper flow of fuel through the replacement filter.
  1. Install the filter in the bracket, ensuring proper direction of flow as noted by arrow. Tighten clamp to 15-25 inch lbs.
  2. Install the push connect fittings at both ends of the filter.
  3. Lower the vehicle.
  4. Start the engine and check for leaks.
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Properly relieve the fuel system pressure.
  3. Remove or disconnect the following:
    • Negative battery cable
    • Push connect and R-clip fittings from the fuel filter
    • Fuel filter 0900c15280192eee.jpgFuel filter location and connections–2002–2006
To install:
  1. Install or connect the following:
    • Fuel filter. Torque the nut to 17 ft. lbs. (23 Nm).
    • R-clip and push connect fittings
    • Negative battery cable
  2. Start the vehicle, check for leaks and repair if necessary.

Oct 17, 2008 | 2002 Mazda B-Series

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