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How to change spark plug wires/fuel injectors?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by SurfInferno, Jan 8, 2014.

  1. Jan 8, 2014 at 7:53 AM
    #1
    SurfInferno

    SurfInferno [OP] Dont be stupid, its not smart.

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    Dylan
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    I have a 4cyl and it just started misfiring. How to I change the wires? And how do I replace the fuel injectors? Can't find a write up anywhere
     
  2. Jan 8, 2014 at 2:04 PM
    #2
    SurfInferno

    SurfInferno [OP] Dont be stupid, its not smart.

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    Already replaced the spark plug and coil...
     
  3. Jan 8, 2014 at 3:30 PM
    #3
    Jimmyh

    Jimmyh Well-Known Member

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    They do not have " Spark Plug Wires " in the traditional sense. They have coil over the spark plugs one for each.

    Why do you think you need to replace the fuel injectors? They should be good for the life of the truck.

    Have you checked for codes? Do you have a Check Engine Light?
     
  4. Jan 8, 2014 at 4:46 PM
    #4
    SurfInferno

    SurfInferno [OP] Dont be stupid, its not smart.

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    I have a check engine light and code p0301. I do have a pretty bad exhaust leak that I'm going to fix tonight, could that be causing it?
    I am solid with fabrication but when it comes to engines I'm dumber than a door
     
  5. Jan 8, 2014 at 7:55 PM
    #5
    Jimmyh

    Jimmyh Well-Known Member

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    This is from the Factory Service Manual:

    Codes:
    P301, P302, P303, P304 - Misfiring of specific cylinder detected (2 trip detection logic)

    Possible issues:

    • Open or short in engine wire harness
    • Connector connection
    • Vacuum hose connections
    • Ignition system
    • Injector
    • Fuel pressure
    • Air induction system
    • Mass Air Flow (MAF) meter
    • Engine Coolant Temperature (ECT) sensor
    • Compression pressure
    • Valve clearance
    • Valve timing
    • PCV valve and hose
    • PCV hose connections
    • ECM

    Monitor Strategy:


    Related DTCs
    P0300: Multiple cylinder misfire
    P0301: Cylinder 1 misfire
    P0302: Cylinder 2 misfire
    P0303: Cylinder 3 misfire
    P0304: Cylinder 4 misfire

    Required Sensors/Components (Main) Injector, Ignition coil, Spark plug

    Required Sensors/Components (Related) Crankshaft, Camshaft, Engine coolant temperature and intake air temperature sensors and Mass air flow meter.

    Frequency of Operation Continuous
    Duration 1,000 to 4,000 crankshaft revolutions: Emission related misfire
    200 to 600 crankshaft revolutions: Catalyst damaged misfire
    MIL Operation 2 driving cycles: Emission related misfire
    MIL flashes immediately: Catalyst damaged misfire
     
  6. Jan 8, 2014 at 11:03 PM
    #6
    SurfInferno

    SurfInferno [OP] Dont be stupid, its not smart.

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    Awesome thank you. I should replace the pcv valve but I have no idea where that is
     
  7. Jan 8, 2014 at 11:23 PM
    #7
    Jimmyh

    Jimmyh Well-Known Member

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    It is in the valve cover Rear Passenger side corner.
     
  8. Jan 9, 2014 at 9:16 AM
    #8
    speedjunkie13

    speedjunkie13 Well-Known Member

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    Honestly you would probably save money by just taking it to a shop and letting them diagnose it. you are going to spend just as much randomly throwing new parts at it...
     

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