Question about 1998 Mazda B-Series

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1998 Mazda b3000 , 3.0 have a fuel leak from the what I've heard described as the fuel pressure regulator or fuel pulse damper located on the front of the fuel rail on the right side of the engine. I'm having trouble locating the part because of these two possible descriptions. What is it called in the parts diagrams???

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  • 74 Answers

Fuel regulator

Posted on Oct 18, 2013

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Posted on Jan 02, 2017

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SOURCE: Location under hood for fuel pump relay on 2002 Mazda Millenia S

JUST RELEASE THE PRESSURE AT THE FUEL PRESSURE TEST PORT ON THE FUEL SUPPLY RAIL THAT SUPPLIES THE INJECTORS, IT IS A METAL VALVE LIKE A TIRE VALVE, THAT IS THE FACTORY RECOMMENDED METHOD..

Posted on Mar 11, 2009

  • 155 Answers

SOURCE: 2004 mazda MPv Where is the location of cyl. #6?

The firing order is 1-4-2-5-3-6. The cylinders are, front bank is from drivers side to passenger, 6-5-4 , and 3-2-1 at the firewall.

Posted on Jun 08, 2009

  • 57 Answers

SOURCE: 2000 Mazda MPV. Where is fuel filter located. Some

Ok... best way to find the fuel filter is to chase the fuel lines from the tank to the pump! some vehicles situate the filter by the back wheel while some cars have the filter in the bulk head! simple to recognise as these are Grey round canisters!

Posted on Nov 05, 2009

  • 73 Answers

SOURCE: Can't locate the thermostat on my 1998 Mazda B2500

Buy a Hayne's Repair Manual. It's a life-saver. Otherwise, go to AutoZone and ask. Either they'll print out a photo for you or they'll just come out and show you. Good Luck.

Posted on Dec 09, 2009

  • 1 Answer

SOURCE: 2000 mazda 626 fuel filter location.engine

it should be on the driver side. very hard to get to. look under the air box were the air filter goes.
j.aguilar

Posted on Feb 19, 2010

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P1250 DTC on a 01 Mazda Protege


P1250 Mazda Fuel Pressure Regulator Control Solenoid

Since the code came back immediately this indicates that it is a hard fault. The solenoid is an electrical switch controlled by the ECM. In this case it controls vacuum provided to the fuel pressure regulator. On this vehicle locate the fuel injectors and the rail above them. At the end of the rail is the regulator which on it should have a vacuum hose. Check out the hose make sure there is not leaks or it is not coming apart. If it is okay the other end of it plugs into the solenoid. This is the failed component.

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My 1998 dodge neon wont start until i pour gas in the throttle body then dies out when i press the gas


What is the fuel pressure when the engine is running ?
Has the filter been replaced ?

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Truck won't start after it sits overnight


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Starting my 1998 4 runner-4 cylinder, smell of fuel from engine compartment and noise from engine compartment, no lights on dashboard


Check all of your fuel lines that go to the fuel rail for leaks or cracked hoses.Be sure that the pressure regulator and pulsation damper isn't leaking.Also be sure none of the throttle body components aren't leaking.As far as the sound without knowing what the sound is like I don't want to mislead you only because sound travels it would be hard to pinpoint the sound without being there to hear it.Also inspect the injectors for any leakage.

Mar 13, 2011 | 1998 Toyota 4Runner

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When you turn the key on excessive fuel flows into the air intake. its a 1989 6 cylinder 3.1 fuel injected


You could have either an injector that is stuck open or a fuel pressure regulator that has developed a leak. A leaky injector will usually only leak fuel into one cylinder as it is located just above the intake valve in the lower part of the intake while a leaky fuel pressure regulator will leak fuel into the front end of the intake manifold [behind the throttle plates] and the fuel will acuumulate throughout the upper intake plenum. When a fuel pressure regulator develops a leak the fuel that is escaping from it flows through the small 1/8" diameter plastic vacuum line which goes from the top of the regulator to the intake manifold. Even a trace of fuel in this line means the regulator is bad. I've seen both leak items leak but probably replace 10 regulators leak for every one injector. Good luck, hope you find your problem!

Jul 22, 2010 | 1989 Oldsmobile Cutlass Supreme

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Po300 code/ when is cool in the morning,the suv when a due gas .


Sounds like your fuel pressure is leaking gas which is located in your intake platinum with your fuel injector unit (SCFI). When the fuel leaks out over night, it floods the intake with gas causing it to give your the issues you have described.
The other issue that may be happening is that your SCFI system is on it's way out due to excessive carbon build on the fuel poppet nozzle which is causing you to have the issues your having.
With the problem you have described, i would lean towards the faulty fuel pressure regulator leaking since the Blazer is running fine after the extra fuel that leaked in to the intake have burnt off.
Replace the fuel pressure regulator first and clean the upper intake platinum of carbon before reassembly.
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Mazda protege 1998


Black smoke means the air/fuel mixture is too rich. Try checking the fuel pressure regulator for leaks by disconnecting the vacuum line while the engine is running this could be the potential cause. Also check the spark plugs and replace them, they are probably fouled.

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Where is the fuel relay located in Mazda mx6 1988?


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Feb 08, 2010 | 1988 Mazda MX-6

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Fuel pours into cylinders


very strange and rare problem. something is keping the injectors open instead of pulsing them. The command to ground the injectors comes from the PCM, Powertrain Control Module. It may be a good idea to pick up a used one from a salvage yard. car-part.com is a good place to look. You will need the info off your module to match up.
Do you have 2.0L SPI engine or 2.0L Zetec engine?
Look on the page with the * to find the lowest price part.
aso, check for shorted wire going to injectors
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Mechanical Returnless Fuel System The fuel system consists of a fuel tank with reservoir, fuel pump, fuel pressure regulator, fuel filter, fuel supply line, fuel rail, fuel rail pulse damper, fuel injectors, and schrader/pressure test point. Operation of the system is as follows (Figure 62):
  1. The fuel delivery system is enabled during crank or running mode once the PCM receives a crankshaft position (CKP) sensor signal.
  1. The fuel pump logic is defined in the fuel system control strategy and is executed by the PCM.
  1. The PCM grounds the fuel pump relay, which provides VPWR to the fuel pump.
  1. The inertia fuel shut-off (IFS) switch is used to de-energize the fuel delivery secondary circuit in the event of collision. The IFS switch is a safety device that should only be reset after a thorough inspection of the vehicle (following a collision).
  1. A pressure test point valve (schrader valve) is located on the fuel rail. This is used to measure fuel injector supply pressure for diagnostic procedures and repairs. ON VEHICLES NOT EQUIPPED WITH A SCHRADER VALVE, USE ROTUNDA FUEL PRESSURE TEST KIT #134—R0087 OR EQUIVALENT.
  1. Located on the fuel rail is a pulse damper. The pulse damper reduces fuel system noise caused by the pulsing of the fuel injectors. The vacuum port located on the damper is connected to manifold vacuum to avoid fuel spillage in the event the pulse damper diaphragm were to rupture (the pulse damper should not be confused with a fuel pressure regulator).
  1. The fuel injector is a solenoid-operated valve that meters the fuel flow to each combustion cylinder. The fuel injector is opened and closed a constant number of times per crankshaft revolution. The amount of fuel is controlled by the length of time the fuel injector is held open. The injector is normally closed and is operated by 12 volt VPWR from the power relay. The ground signal is controlled by the PCM.
  1. There are three filtering or screening devices in the fuel delivery system. The intake sock is a fine, nylon mesh screen mounted on the intake side of the fuel pump. There is a fuel filter screen located at the fuel rail side of the fuel injector. The fuel filter assembly is located between the fuel pump and the pressure test point/schrader valve.
  1. The fuel pump (FP) module contains the fuel pump, fuel pressure regulator and the fuel sender assembly. The fuel pressure regulator is attached to the fuel pump in the fuel pump module located in the fuel tank. It regulates fuel pressure supplied to the fuel injectors. The fuel pressure regulator is a diaphragm-operated relief valve. Fuel pressure is established by a spring preload applied to the diaphragm. Excess fuel is bypassed through the regulator and returned to the fuel tank.

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    Figure 62: Fuel System—Mechanical Returnless
Electronic Returnless Fuel System The fuel system consists of a fuel tank with reservoir, fuel pump, fuel rail pressure sensor, fuel filter, fuel supply line, engine fuel temperature sensor, fuel rail, fuel injectors, and schrader/pressure test point. Operation of the system is as follows (Figure 63) and (Figure 64):
  1. The fuel delivery system is enabled during crank or running mode once the PCM receives a crankshaft position (CKP) sensor signal.
  1. The fuel pump logic is defined in the fuel system control strategy and is executed by the PCM.
  1. The PCM commands a duty cycle to the fuel pump driver module (FPDM).
  1. The fuel pump driver module modulates the voltage to the fuel pump (FP) to achieve the proper fuel pressure. Voltage for the fuel pump is supplied by the power relay or FPDM power supply relay. (For additional information on FPDM operation, refer to PCM Outputs—Fuel Pump and PCM Inputs—FPM.)
  1. The fuel rail pressure (FRP) sensor provides the PCM with the current fuel rail pressure. The PCM uses this information to vary the duty cycle output to the FPDM to compensate for varying loads.
  1. The engine fuel temperature (EFT) sensor measures current fuel temperatures in the fuel rail. This information is used to vary the fuel pressure and avoid fuel system vaporization.
  1. The fuel injector is a solenoid-operated valve that meters the fuel flow to each combustion cylinder. The fuel injector is opened and closed a constant number of times per crankshaft revolution. The amount of fuel is controlled by the length of time the fuel injector is held open. The injector is normally closed and is operated by 12 volt VPWR from the power relay. The ground signal is controlled by the PCM.
  1. A pressure test point valve (schrader valve) is located on the fuel rail. This is used to measure fuel injector supply pressure for diagnostic procedures and repairs. ON VEHICLES NOT EQUIPPED WITH A SCHRADER VALVE, USE ROTUNDA FUEL PRESSURE TEST KIT #134—R0087 OR EQUIVALENT.
  1. There are three filtering or screening devices in the fuel delivery system. The intake sock is a fine, nylon mesh screen mounted on the intake side of the fuel pump. There is a fuel filter screen located at the fuel rail side of the fuel injector. The fuel filter assembly is located between the fuel pump and the pressure test point/schrader valve.
  1. The fuel pump (FP) module is a device that contains the fuel pump and the fuel sender assembly. The fuel pump is located inside the reservoir and supplies fuel through the fuel pump module manifold to the engine and the fuel pump module jet pump.
  1. The inertia fuel shut-off (IFS) switch is used to de-energize the fuel delivery secondary circuit in the event of a collision. The IFS switch is a safety device that should only be reset after a thorough inspection of the vehicle (following a collision

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