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Fuel injector no negative in plugs injector is not open to start

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Please explain 'no negative' in plugs 'injector' is not 'open' to start'????

Posted on Apr 08, 2011

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I need to replace the #2 fuel injector. Is this something a layman such as I can accomplish?


You could do it, but remember gasoline is flammable and volatile and can be hazardous to work with: REMOVAL AND INSTALLATION 1.9L Engines
  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
    • Fuel rail
    • Fuel injector retaining clip off the injector
    • Fuel injector
    • Fuel injector O-rings and discard them Fig. 1: Fuel injector identification-1.9L engine 9306zg58.gif
    To install: NOTE: The SOHC and DOHC fuel injectors are not interchangeable. The injectors are identified by a color coded plastic ring near the bottom of the injector. The SOHC injector has a blue ring near the O-ring that mates to the intake manifold and the DOHC has a pink ring.
  4. Lubricate the new fuel injector O-ring with clean engine oil.
  5. Install or connect the following:
    • New O-ring seals on the fuel injector
    • Retaining clip to the fuel injector
    • Fuel injector to the fuel rail
    • Fuel rail
    • Negative battery cable
  6. Start the vehicle and check for leaks, repair if necessary.
2.2L and 3.0L Engines
  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
    • Fuel rail
    • Fuel injector retaining clip off the injector
    • Fuel injector
    • Fuel injector O-rings and discard them
Fig. 2: Remove the retainer clip from the fuel injector - 2.2L and 3.0L engines 9306zg59.gif
To install:
  1. Lubricate the new fuel injector O-ring with clean engine oil.
  2. Install or connect the following:
    • New O-ring seals on the fuel injector
    • Retaining clip to the fuel injector
    • Fuel injector to the fuel rail
    • Fuel rail
    • Negative battery cable
  3. Start the vehicle and check for leaks, repair if necessary.
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Feb 14, 2011 | 1999 Saturn SL

1 Answer

Giving a 300 and a 301 code where do i start sounds fine when started and then when you put in gear it start misfiring


P0300 - Random / Multiple Cylinder Misfire Detected

Possible Causes:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plugs
- Replaced Injectors
- Replaced Ignition Coils

P0301- Cylinder Number 1 Misfire Detected

Possible Causes:
- Improper spark plug at cylinder #1
- Insufficient compression at cylinder #1
- Incorrect fuel pressure
- The injector circuit is open or shorted at cylinder #1
- Fuel injector #1 may be faulty
- Intake air leak at cylinder

Possible Solutions:
- Perform Injector Service
- Replaced Spark Plug #1
- Replaced Injector #1
- Replaced Ignition Coil #1

Most likely your issue is with cylinder number 1. Follow the info I have provided and you should be able to solve this issue.

Jan 14, 2011 | 2002 Toyota Tacoma

1 Answer

Gas is leaking from my fuel rail (phlegm) on my number 5 fuel injector on my 1994 camaro


  • Park the Camaro on a flat, level surface and set the parking brake. Open the hood and secure it in place with the hood prop. Disconnect the negative battery cable.
  • Open the gas tank to relieve pressure on the fuel lines.
  • Remove the sight shield from the fuel injector with a socket wrench. Loosen the screws on the hose clamps and disconnect the fuel lines connected to the injectors. Keep a rag handy to catch any fuel that leaks.
  • Disconnect the vacuum hose and ignition coil wire, then unplug the electrical connectors. Remove the fuel injector mounting bolts, undo the retaining clips and remove the fuel injectors.
  • Put a thin coat of engine oil on the new fuel injector's O-ring. Place the O-ring in position, install the new fuel injectors and secure the retaining clips. Install the mounting bolts with a torque wrench set at seven pounds.
  • Plug the electrical connectors back into the fuel injectors. Reconnect the vacuum hose and ignition coil wire. Connect the fuel lines and tighten the hose clamps with a screwdriver to secure them in place. Bolt the sight shield in place with a socket wrench.
  • Place the gas cap back on. Reconnect the negative battery cable



  • Dec 06, 2010 | 1994 Chevrolet Camaro

    1 Answer

    I have fuel leaking from the fuel rail at the 2nd injector from the front. The leak seems to be coming from where the metal of the fuel rail conects to the plastic....


    Maybe an O-ring is leaking. Try a new injector that comes with an o-ring to be sure it's not the injector itself.
    Fuel Injector - for V8

    REMOVAL & INSTALLATION


    1. Before servicing the vehicle, refer to the precautions in the beginning of
      this section.
    2. Relieve fuel system pressure.
    3. Remove or disconnect the following:

      • Negative battery cable
      • Fuel rail
      • Fuel injector retaining clips
      • Fuel injectors

      To install:

    4. Install or connect the following:

      • Fuel injectors, using new O-rings
      • Fuel injector clips to the fuel rail
      • Fuel rail
      • Negative battery cable

    5. Start the vehicle and check for leaks, repair if necessary.

    Oct 30, 2010 | 2002 Jeep Grand Cherokee

    1 Answer

    How do i chage the fuel injector for a geo metro 1997 LSI?


    REMOVAL & INSTALLATION Fig. 1: Removing injectors from fuel rail 84245032.gif
    Fig. 2: Make sure injectors rotate freely in cylinder head 84245033.gif
    1. Relieve fuel system pressure and disconnect the negative battery cable.
    2. Remove intake air hose between throttle body and intercooler.
    3. Remove accelerator cable.
    4. Unclamp PCV and fuel return hoses from deliver pipe.
    5. Unclamp injector wiring harness.
    6. Disconnect injector coupler.
    7. Remove cold start injector pipe from delivery pipe.
    8. Remove vacuum hose from pressure regulator.
    9. Remove fuel feed hose from delivery pipe.
    10. Remove pressure regulator from delivery pipe.
    11. Remove delivery pipe with injectors.
    12. Remove injectors from delivery pipe. To install:
    13. Replace injector O-rings and lubricate with fuel. NOTE: Make sure injectors rotate smoothly. If not, probable cause is incorrect installation of O-ring.
    14. Check if insulator is scored or damaged. If it is, replace with new one.
    15. Connect delivery pipe with injectors.
    16. Install pressure regulator to delivery pipe using a new O-ring.
    17. Install fuel feed hose to delivery pipe.
    18. Install vacuum and fuel return hoses to pressure regulator and clamp securely.
    19. Install cold start injector pipe to delivery pipe using new gaskets.
    20. Install injector coupler. Clamp injector wiring harness.
    21. Install PCV hose to cylinder head.
    22. Install throttle position sensor coupler.
    23. Install accelerator cable and adjust free-play.
    24. Install intake air hose to throttle body and intercooler.
    25. Connect the negative battery cable.
    26. Start engine and check for leaks.
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    Jul 03, 2010 | 1997 Geo Metro

    1 Answer

    How do you install injectors in a chevy s-10 pick-up?


    Removal & Installation

    8205896.gif
    Exploded view of the fuel rail and injector mounting


    Take care when servicing the fuel rail assembly to prevent dirt or contaminants from entering the fuel system. ALL openings in the fuel lines and passages should be capped or plugged while disconnected.
    1. Before disassembly, clean the fuel rail assembly with a spray type cleaner such as AC Delco® X-30A, or equivalent. After removal, DO NOT immerse the fuel rail in liquid solvent.
    2. Properly relieve the fuel system pressure and disconnect the negative battery cable.
    3. Remove the air intake duct, as necessary for access.
    4. Tag and disengage the fuel injector electrical connectors.
    5. Disengage the fuel pressure regulator vacuum line, then tag and disengage all other necessary vacuum hoses.
    6. Loosen and remove the fuel rail retaining bolts.
    7. If necessary to remove the fuel rail assembly completely from the engine compartment, or to prevent stressing and damaging the fuel lines, disconnect the fuel lines from the rail assembly.
    8. Carefully lift the fuel rail assembly and fuel injectors from the intake.
    9. Carefully release and separate the fuel injectors from the rail assembly.
    10. Remove and discard ALL old O-rings from the fuel injectors and, if disconnected, the fuel lines.
    To install:
    1. Lightly coat the new O-rings with clean engine oil, then position them to the injectors and, if applicable, fuel fittings.
    2. Install the injectors to the fuel rail assembly.
    3. Carefully install the fuel rail and injectors to the intake manifold. Make sure the injectors are properly seated in their bores, but DO NOT force them into position.
    4. Install and tighten the rail retaining bolts to 62 inch lbs. (7 Nm).
    5. If removed, connect the fuel lines to the rail assembly and secure the fittings.
    6. Engage the fuel pressure regulator and any other vacuum lines, as noted during removal.
    7. Engage the injector electrical connectors.
    8. Connect the negative battery cable and cycle the ignition switch (without attempting to start the engine) in order to pressurize the fuel system, then check for leaks.
    9. Install the air intake duct.

    Apr 25, 2010 | 1992 Chevrolet S-10

    1 Answer

    Changing a fuel injector on a Toyota Carina 1996 1800, anyone have an idea how to change before I start?


    Disconnect the wiring plugs from the injectors, Then remove the fuel rail (which is attached to injectors). Then remove injectors from the fuel rail. Don`t forget to change the "O-rings", (little rubber things on the end of each injectors). Otherwise there`s a possibility of fuel leak.
    Also I suggest trying to clean the faulty injector at first, It might be ok, just dirty inside.
    How to clean: Use injector cleaning fluid on the end of the head of the injector. Attach minus and plus to the contacts of the injector to battery of the car or any other energy source, and start pulling the negative wire on the battery on and off. You should hear clicking sound in the injector. Use the fluid and this "technique" for couple minutes or more, until the injector starts spitting the cleaning fluid evenly, not rarely. If still the injector doesn`t spit the fluid, you might need to change it.


    Hope this helps, sorry for my english. I`m a lithuanian

    Feb 16, 2010 | 1996 Toyota Camry

    1 Answer

    I have a 1987 honda accord. It has the programmed fuel injection system. The fuel is making it all the way to the fuel rail, yet the combustion chamber is dry!!! It has good fuel pressure... Does anyone...


    Honda injector works on a negative ground circuit, where the circuit is controlled by opening and closing the negative pole. There should always be a hot wire (pos.) to each injector when ignition is on. Test with test light at the injector. If you do have power there then it would most likely be a bad computer. If not then look at wiring or power supply.

    Jan 22, 2010 | 1987 Honda Civic

    3 Answers

    Ford focus tdci wont start fuel gettin to injectors can u help 2005


    Check the electric stop on the injector pump is working.

    Aug 07, 2009 | 2005 Ford Focus

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