Question about 1999 Mazda 626

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Fuel system pressure release with fuel filter replacement process

Is there a suggested way to replace the fuel filter on a '99 Mazda 626? How does one release fuel system pressure before servicing?

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Just remove the gas tank cap.

Posted on May 26, 2009

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What are symptoms of a clogged fuel filter? It's a 2001 Mazda 626, it's a four cylinder.


low fuel pressure , random misfires, hard starting
it has to be extreme for a filter to be blocked
the same indications for a blocked filter or problem pump can be from a faulty EVAP system or EVAP purge valve not venting and the tank is in a vacuum condition
read the fault codes first

Oct 01, 2016 | 2001 Mazda 626

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2000 Mazda 626


Sixteen year old car with only 40K miles must not be driven often, or sat for some time. I would suspect fuel system issue, such as bad pump, clogged filter, bad regulator or faulty injectors. Start by testing fuel pressure.

Jun 20, 2016 | 2000 Mazda 626

1 Answer

99 mazda 626 cut out and won't restart has spark and fuel


When you checked fuel did you check for proper fuel pressure your pump may have pressure but not enough to keep it running. Also Check all your fuses, I had a truck crank and crank I replaced fuel filter etc and come to find out it was just a 5 amp fuse for the ignition

Dec 10, 2013 | Mazda 626 Cars & Trucks

1 Answer

Just trying to get the motor to turn over. and trying to locate the fuel filter and how to replace it


A fuel filter will not cause a no start, check the pressure and see if you have any. Spray starting fluid into the intake and see if it starts and stalls, that indicated no fuel pressure. Also run a MECS OBD1 computer control system fault code test, you will need a MECS (Mazda Electronic control system) system scanner to do that or a Ford Star tester with a MECS adapter kit. (Ford owned a controlling interest Mazda then and now) You may just have a failed fuel pump.

Oct 10, 2012 | 1988 Mazda 626

1 Answer

Have 99 mazda 626 sat idle for a year replaced batterty and alternator belt . cranks but won't start.


I would check to see if the car is getting fuel to the engine. Make sure your fuel pump is kicking on. Check to see if gas is going to the fuel filter from the pump. Make sure gas is going through the pump as well. You could also check the fuel pressure to avoid looking. Make sure it is in range. Also, make sure your battery terminals are cleaned and they are not loose. Make sure all the wires are tight and correct at the alternator. You may have an issue with the ignition system. check for spark. You may have a bad plugs or perhaps, a crank sensor or cam sensor. It could be anyone of these parts. You just need to do the proper test to eliminate all possibilities. If you have a question, just let me know.

Mar 01, 2011 | 1999 Mazda 626

1 Answer

How do you replace a 2001 Mazda 626 Fuel Filter


Fuel Filter On all models except the Millenia, the fuel filter is attached to a bracket located in the left rear of the engine compartment, next to or beneath the brake master cylinder fluid reservoir. On the Millenia, the fuel filter is located beneath an access cover in the trunk. Access to the cover is achieved by removing the trunk mat to expose the cover.
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REMOVAL & INSTALLATION Except Millenia
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Properly relieve the fuel system pressure.
  3. Remove or disconnect the following:
    • Negative battery cable Fig. 1: Exploded view of a common fuel filter and related components 7923mg68.gif

    • Air intake hose and/or filter housing, if necessary
    • Fuel line clamps, if equipped
    • Fuel lines from the filter and plug the openings
    • Filter clamp bolt/nut by loosening them.
    • Fuel filter from its mounting bracket
    NOTE: Note the direction of the flow arrow on the filter so the replacement filter can be installed in the correct position. To install:
  4. Install or connect the following:
    • Fuel filter in its mounting bracket, making sure the flow arrow is pointing in the proper direction
    • Fuel lines to the fuel filter
    • Fuel line clamps, if equipped
    • Air intake hose and/or filter housing, if removed
    • Negative battery cable
  5. Pressurize the fuel system and check all connections for leaks.
Millenia
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Insure the ignition switch is OFF.
  3. Relieve the fuel system pressure.
  4. Remove or disconnect the following:
    • Negative battery cable
    • Trunk mat
    • Service hole cover
    • Fuel lines from both ends of the fuel filter
    • Fuel filter and bracket
    • Fuel filter from the mounting bracket.
    To install:
  5. Install or connect the following:
    • Filter in the bracket. Tighten the nut to 70-95 inch lbs. (8-11 Nm).
    • Fuel lines to the filter
    • Service hole cover
    • Trunk mat
    • Negative battery cable
  6. Run the engine and check for any fuel leaks.
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Oct 17, 2010 | 2001 Mazda 626

1 Answer

1999 mazda 626 6cyl no fuel geting to onjectors


Priority Action Part Type Cause
1 Inspect Fuel Pump fuse - short to ground in fuel pump circuit
2 Inspect Fuel Filter Clogged or Dirty Fuel Filter.
3 Inspect Relay - Fuel Pump Faulty Fuel Pump Relay.
4 Inspect Fuel Injector Pressure Regulator Faulty Fuel Injector Pressure Regulator.
5 Inspect Fuel Pump Low Fuel Pressure.
6 Inspect Engine Control Computer Incorrect Operating Information Being Delivered and Sent From The EEC.
7 Inspect Fuel Pump Strainer Clogged or Dirty Fuel Pump Strainerat.
8 Inspect Fuel Rail - leaky Fuel Rail

From April 2010? What did the problem turn out to be?

Apr 25, 2010 | 1999 Mazda 626

1 Answer

How to Replace a Fuel pump on a 2000 Mazda 626


yes it isn't that much if you buy them.they slide inside the coupler and release the line.

Dec 26, 2009 | 2000 Mazda 626

1 Answer

Code 17 on a mazda 626 1992 lx what does it mean


The OBD-1 two digits trouble codes listed 'code-17' as:
Oxygen sensor.

This means that the fuel and ignition systems performance are in need of attention.

1.Distributor Cap: remove the 3-bolts holding the distriboutr to its body.
2. Inspect the distributor cap for cracks, and the roror-button is not worn or broken.
3. Inspect the distributor-cap terminals are not corroded or charred. Replace if charred. Clean them out if corroded.
4. Check the distributor-rotor for cracks or corrosion on its tip, and lesser spring tension.
Replace as necessary.
5. Reverse steps 1-4 to re-install distributor cap. Be sure to remove and replace the plug wires from the old distributor-cap to the new distributor-cap one-by-one. If not, the engine would not run.

Fuel-Filter:
1. Undo the top clips holding the fuel-filter hose, and undo the lower clips also.
2. Take out the fuel-filter from its mount.
3. Replace the fuel filter as necessary.(please not the way it was mounted) Reverse removal for installation.

Dec 11, 2009 | 1992 Mazda 626

1 Answer

My mazda 626 1994 keeps cutting off after starting. then it finally starts on the third try or so....what might be the problem?


has the fuel filter been replaced? that might be the easiest place to start. checking the fuel pressure might also be good after you have determined that the fuel filter is in fact plugged.

Nov 09, 2009 | 1995 Mazda 626

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