Question about Mazda MPV

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My mazda mvp had check engine lite on p0301 directs me to misfire how i fix it and how check coil,or poss injector, with 3.0 engine

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  • leonel alvarado Mar 25, 2011

    THIS A OLD SOLUTION WORKS ON .OLD CARS ( CHEVIYS OR FORD) ON THIS INTAKE MANIFOLD HAS TO COME OUT ANY THECNICAL SOLUTION UR ANSWER IS ONLY APLY TO OTHER CARS NOT THIS MAZDA

  • leonel alvarado Mar 25, 2011

    i said on my first post is 2005 mvp with 3.0 engine, i like tech answer not generl knoledged of auto technical please general repair. i not need it please need the procedure of remove intake manifold and anps or resistance on injector techcnical answer plrase

  • leonel alvarado Mar 26, 2011

    your awesome u helped me out

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  • Mazda Master
  • 8,123 Answers

Hi, it's not the coil. Take the #1 plug out and plug the wire back onto it, then use an oven mit or other insulator to hold the plug threads against the engine to form a ground connection while someone briefly starts the engine (this will be loud with the plug out). Check to see if the plug is sparking. If no spark, you have a bad wire or plug. If the wires are old, change them all.
If you have spark, run a compression test on the engine to see if #1 has low compression. Get back to me if it does for further troubleshooting steps.
If you have spark and compression is good, then pull out the injector and clean or replace.

Please see my tip at http://www.fixya.com/cars/r6715318-causes_gasoline_engine_misfires . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

Posted on Mar 25, 2011

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  • Jeff Turcotte
    Jeff Turcotte Mar 25, 2011

    Hi, I'm not sure what year your MPV is, but I'm familiar with Mazda engines. The link above is generic. If you would like specific instructions for removing your injectors, please tell me the year of the van.

    Thanks, Jeff

  • Jeff Turcotte
    Jeff Turcotte Mar 25, 2011

    Here is the procedure for removing the injector. I don't have the spec on injector impedance, but you can compare it to the others on the engine. They should be the same within 10% or so.



    Removal & Installation
    2.5L & 3.0L Engine




    1. Before servicing the vehicle, refer to the Precautions section.

    2. Relieve the fuel system pressure.

    3. Remove or disconnect the following:



      Negative battery cable,

      Air cleaner housing and fresh air duct,

      Mass Air Flow (MAF) sensor,

      Intake manifold,

      Fuel injector harness connectors,

      Fuel lines,

      Pressure regulator vacuum hose,

      Fuel supply manifold with injectors attached,

      Fuel injectors.


    To install:



    1. Install or connect the following:



      Fuel injectors with new O-ring seals,

      Fuel supply manifold with injectors attached. Tighten the bolts to 72-101 inch lbs. (8-11 Nm).,

      Pressure regulator vacuum hose,

      Fuel lines,

      Fuel injector harness connectors,

      Intake manifold,

      MAF sensor,

      Air cleaner housing and fresh air duct,

      Negative battery cable



    2. Start the engine and check for leaks.

  • Jeff Turcotte
    Jeff Turcotte Mar 25, 2011

    Here is the procedure for both intake manifolds, but you will stop after the upper manifold.



    3.0L Engine




    1. Before servicing the vehicle, refer to the Precautions section.

    2. Relieve the fuel system pressure.

    3. Remove or disconnect the following:



      Negative battery cable

      Air cleaner housing and fresh air duct

      Resonance chamber

      Mass Air Flow (MAF) sensor

      Throttle body intake hose

      Accelerator cable and bracket

      IMCC actuator

      Throttle body

      Exhaust Gas Recirculation (EGR) valve

      Idle Air Control (IAC) valve

      Dynamic chamber

      Intake manifold




    To install:



    1. Install or connect the following:



      Intake manifold. Tighten the bolts in sequence to 72-105 inch lbs. (8-12 Nm).

      Dynamic chamber. Tighten the bolts in sequence to 72-105 inch lbs. (8-12 Nm).



    2. The remainder if installation is the reverse of removal.

    3. Start the engine and check for leaks.





      Fig. Intake manifold torque sequence-3.0L engine





      Fig. Dynamic chamber torque sequence-3.0L engine





    Fig. Exploded view of the intake air system-3.0L engine

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