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Fuel injector stuck in lower intake manifold - 2000 Buick Century

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 1118 Answers

SOURCE: Oil on top of lower intake manifold

Its a common problem, but it has to be adressed before your engine is done. That oil is comming out wear the distributor wonce was. The plentem, or what you call upper intake will have to come back off, in order to get the plug out to chg. the rubber O- ring on the plugWhen you get it out it will look like half a distributor with the gear on the end and the O- ring towards the top. Its located right under the throuttle on left side of engine where the trans and block meat. There might be enought room to get it out without pulling the intake i'am not sure. But thats where the oil is comming from manny an engine has tied up because of that leak.

Posted on Feb 08, 2009

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emissionwiz
  • 76691 Answers

SOURCE: Fuel rails/injectore removal

they just pull out, replace the O ring seals on each injector before reinstalling, also put Vaseline on the O ring seals before installing them to prevent damage.

Posted on Feb 16, 2009

airjer995
  • 5332 Answers

SOURCE: internal coolant leak/pooling on top of intake and coolant in cylinders

The passage in the upper plenum that the egr tube passes through has ruptured. This is a very common problem with the plastic plenums. The aftermarket plenums have been reinforced in this area and come with smaller egr tubes to help prevent this from happening again. Replace the upper plenum, soak up all the coolant under the plenum, pull the plugs and rotate the engine by hand at first to push out the coolant in the cylinders, and change the oil. After that you should be good as new. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

Posted on Jan 23, 2012

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1 Answer

I need to see a coolant system hose that leaks does the intake have to be removed


Yes there are cooling system hoses under the intake, here are instructions to remove the intake.

Instructions
  1. Remove the Intake Manifold
    • 1Drain the cooling system and relieve the pressure in the fuel system. Disconnect the negative battery cable, the air intake duct, the IAC valve connectors, the throttle position sensor and switch connectors, and the EGR solenoid valve.
    • 2Pull the EVAP canister vacuum and purge hoses, the vacuum hoses from the EVAP, the brake cylinder, pressure regulator and EGR tube. Tag and disconnect the spark plug wires. Remove the distributor cap.
    • 3. Take out the three left bank injector connectors, the thermal transmitter, the ground harness, breather pipe and the upper manifold. Disconnect the fuel feed and return lines and plug them with golf tees to prevent fuel spillage.
    • 4Locate the right injector harness connectors and disconnect them as well as the fuel rail and injectors. Remove the coolant temperature switch harness connector and the water hose from the thermostat.
    • 5Loose the bolts on the lower manifold in sequence. Remove the bolts and left the intake manifold from the engine. Remove the gasket and discard it.
    • 6Clean the mating surfaces by scraping the old gasket material and carbon deposits. Clean the surfaces with solvent and inspect them for damage.
    Install the Intake Manifold
    • 7Put a new gasket in place and install the lower intake manifold to the engine. Tighten the bolts in sequence as follows: first pass-35 inch pounds; second pass-78 inch pounds and third pass 70 to 84 inch pounds.
    • 8Connect the ECT sensor connector, the fuel supply manifold and the right bank injector connectors. Connect the fuel lines and then install the upper intake manifold. Put the breather pipe in position.
    • 9Install the intake manifold ground cable, the thermal transmitter, the left bank injector connectors and the distributor. Reconnect the spark plug wires.
    • 10Continue reconnecting all the components, reversing the order in which they were removed. Connect the negative battery cable to the terminal. Refill the cooling system with the appropriate coolant.
    • 11Start the engine. Check for fuel or vacuum leaks.

Jul 02, 2012 | 1997 Mercury Villager

1 Answer

Do I have to take the top in take manafold off to tighten the lower intake manafold on a 1993 buick regal 3.8 L engine?


Yes you do, the following info explains the necessary procedure.



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  1. Properly relieve the fuel system pressure.
  2. Disconnect the negative battery cable. Place a clean drain pan under the radiator, open the drain **** and drain the cooling system.
  3. Remove the air cleaner assembly and the fuel injector sight shield.
  4. Disconnect the cables from the throttle body and mount bracket.
  5. Remove the coolant recovery reservoir.
  6. Remove the inner fender electrical cover on the right side.
  7. Remove the right rear crossover pipe heat shield.
  8. Disconnect the fuel lines from the fuel rail and from the cable bracket.
  9. Remove the alternator and brace.
  10. Remove the throttle body cable mounting bracket with the vacuum lines and disconnect the vacuum lines.
  11. Tag and detach the electrical connections at the throttle body and both banks of fuel injectors.
  12. Disconnect the vacuum hoses from the canister purge solenoid valve and transaxle module and intake connection.
  13. Unbolt the power steering pump and move forward. DO NOT disconnect the fluid lines.
  14. Tag and disconnect the spark plug wires position lay aside.
  15. Disconnect the coolant bypass hose from the intake manifold.
  16. Remove the solenoid valve mounting bracket and power steering support brace from the intake manifold.
  17. Disconnect the heater pipes from the intake and front cover.
  18. Remove the alternator support brace from the intake.
  19. Disconnect the upper radiator hose from the housing.
  20. Remove the thermostat housing and thermostat from the intake.
  21. Detach the electrical connector from the temperature sensor and sensor switch.
  22. Unfasten the intake manifold bolts, then remove the manifold as an assembly. Remove and discard the gaskets.
  23. If separating the upper manifold from the lower, proceed as follows:
  24. Remove the fuel rail and fuel injectors.
  25. Detach the coolant sensor switch.
  26. Remove the manifold end cap cover.
  27. Remove the upper intake manifold and throttle body assembly from the lower manifold. Remove and discard the gaskets. To install:
  28. Thoroughly clean all gasket mating surfaces.
  29. If replacing the upper manifold, proceed as follows:
  30. Apply a 1⁄16 in. bead of Loctite® Instant Gasket Eliminator 51845 or equivalent to the lower manifold mating surface. Make sure to circle all bolt holes.
  31. Carefully lower the upper manifold and throttle body assembly onto the lower manifold.
  32. Tighten the upper manifold retaining bolts to 19 ft. lbs. (26 Nm).
  33. Install the manifold end cap cover and the coolant sensor switch.
  34. Install the fuel injectors and rail to the manifold assembly.
  35. Clean the mating surfaces and install the intake manifold gaskets and seals. Apply sealer to the ends of the of the intake manifold seals.
  36. Position the intake manifold and apply a suitable thread lock compound to the bolt threads. Tighten the retaining bolts to 88 inch lbs. (10 Nm), twice, in the sequence shown in the accompanying figure.
  37. Attach the electrical connector to the temperature sensor and sensor switch.
  38. Install the thermostat housing and thermostat with a new gasket.
  39. Connect the alternator support brace to the intake.
  40. Install the solenoid valve mounting bracket and power steering support brace to the intake manifold.
  41. Connect the heater pipes to the intake and front cover.
  42. Attach the coolant bypass hose to the intake manifold.
  43. Install the power steering pump support bracket and tighten to 37 ft. lbs. (50 Nm).
  44. Install the spark plug wires on both sides.
  45. Install the belt tensioner pulley and tighten to 33 ft. lbs. (45 Nm).
  46. Install the power steering pump.
  47. Connect the vacuum hoses to the canister purge solenoid valve and transaxle module and intake connection.
  48. Attach the electrical connections at the throttle body and both banks of fuel injectors.
  49. Install the alternator and brace.
  50. Connect the throttle body cable mounting bracket with the vacuum lines.
  51. Install the right rear crossover pipe heat shield.
  52. Install the cables to the throttle body.
  53. Connect the fuel lines to the fuel rail and mount bracket.
  54. Install the inner fender electrical cover on the right side.
  55. Install the coolant recovery reservoir and upper radiator hose. Fill the cooling system.
  56. Install the air cleaner assembly and the fuel injector sight shield.
  57. Connect the negative battery cable.

Jan 31, 2011 | 1993 Buick Regal

1 Answer

How to remove intake manifold on 2005 Buick Lesabre


You didn't post the size of your engine so please pick the appropriate one:

3.8L
  1. Relieve the fuel system pressure.
  2. Drain the cooling system.
    1. Remove or disconnect the following:
    2. Negative battery cable
    • Supercharger
    • Thermostat housing
    • Exhaust Gas Recirculation (EGR) tube at the intake manifold
    • Engine Control Temperature (ECT) sensor
    • Intake manifold
  • To install:

    1. Install or connect the following:
      • Intake manifold with new gaskets. Torque the bolts, working from the center out, to 11 ft. lbs. (15 Nm).
      • ECT sensor connector
      • EGR tube to the intake manifold
      • Thermostat housing
      • Supercharger
      • Negative battery cable
    2. Refill and bleed the cooling system.
    3. Run the engine and check for leaks and proper engine operation.
    4.6L
    4.6L Engine
    1. Remove the brake booster hose from the throttle body.
    2. Remove the fuel pressure regulator vacuum tube from the fuel pressure regulator and the water crossover.
    3. Remove the PCV fresh air feed tube from the camshaft cover and the throttle body.
    4. Remove the PCV dirty air tube from the PCV orifice in the right camshaft cover and from the intake manifold.
    5. Disconnect the fuel injector electrical connectors from the fuel injectors.
    6. Remove the fuel injector wiring harness.
    7. Remove the fuel rail bracket nut from the engine lift bracket.
    8. Remove the fuel rail studs.
    9. Lift and remove the fuel rail with injectors.
    10. Loosen the plenum duct clamp in order to remove the intake manifold.
    11. Remove the intake manifold bolts.
    12. Remove the intake manifold.

    To install:

    1. Install the intake manifold, fitting the plenum duct over the intake manifold duct.
    2. Loosely install the intake manifold bolts.

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    Intake manifold torque sequence-4.6L engine


    1. Tighten the intake manifold bolts in sequence. Tighten the intake manifold bolts to 89 inch lbs. (10 Nm).
    2. Tighten the plenum duct clamp to the intake manifold. Tighten the plenum duct clamp to 24 inch lbs. (2.75 Nm).
    3. Inspect the fuel injector O-rings. Ensure the fuel injector O-rings are not missing, misaligned or damaged. Replace the O-rings if necessary.
    4. Lubricate the intake manifold fuel injector bores with light mineral oil (GM P/N 9981704), clean engine oil, or equivalent.
    5. Install the fuel rail with fuel injectors as an assembly.
    6. Install the fuel rail studs. Tighten the fuel rail studs to 80 inch lbs. (9 Nm).
    7. Install the fuel rail bracket nut to the engine lift bracket. Tighten the fuel rail bracket nut to 89 inch lbs. (10 Nm).
    8. Install the fuel injector wiring harness.
    9. Connect the fuel injector electrical connectors to the fuel injectors.
    10. Install the PCV dirty air tube to the PCV orifice in the right camshaft cover and to the intake manifold.
    11. Install the PCV fresh air feed tube to the camshaft cover and the water crossover.
    12. Install the fuel pressure regulator vacuum tube to the fuel pressure regulator and the throttle body.
    13. Install the brake booster hose to the throttle body.

    Nov 13, 2010 | Buick LeSabre Cars & Trucks

    2 Answers

    Where is the #6 electronic fuel injection plug for 1999 plymouth grand voyager 3.3 engine


    3.3L & 3.8L Engines
    Firing order: 1-2-3-4-5-6
    Distributorless Ignition System chry-02-33-786.gif
    The Driver's Side Front spark plug is the #6 cylinder.

    Aug 08, 2010 | 1999 Plymouth Grand Voyager

    2 Answers

    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

    1 Answer

    #3 CYLINDER IS FULL OF FEUL AND TRUCK WILL NOT START.REMOVED SPARK PLUGS AND GAS POURS ON GROUND WHEN KEY IS TURNED ON FROM #3 CYLINDER PLUG HOLE.


    The Vortec engines were notorious for those kind of problems. The problem will be under the upper-intake manifold, and the fuel injector assembly will either have a cracked plastic fuel line running out to one or more of the fuel injectors, or the fuel pressure regulator that is located on the end of the fuel injector assembly is faulty or it has detached from the fuel injector assembly. Either way the lower intake manifold will be flooded with fuel anytime that the fuel pump runs.

    There were two types made, the first type had fuel lines that connected to the lower intake manifold, and then from the metal fittings the fuel line turns into plastic and runs inside the lower intake manifold and under the upper-intake manifold where it runs over to the fuel injector assembly, and this type can really flood out an engine when it becomes faulty.

    The second type had metal fuel lines running over the upper intake manifold and they connected to the top of the fuel injector assembly, however, under the upper-intake manifold there are still plastic lines to the fuel injectors and also the fuel pressure regulator that could be faulty and cause the engine to severely flood.

    The upper-intake manifold is not that difficult to remove, and after you remove the upper-intake manifold then (replace the fuel lines to the fuel injector assembly if it is the second type) turn the ignition to the "Run" position and when the fuel pump runs you should see where the fuel is leaking/spraying from, and it will most likely be a large high pressure leak from a ruptured plastic fuel line.

    Let me know if you require any further assistance.

    Jul 20, 2010 | 1994 Chevrolet S-10 Blazer

    1 Answer

    Need to replace intake manifold how do you do this


    Bonneville, LeSabre, Park Avenue 2000-2005 Intake Manifold - Removal & Installation

    3.8L Engine
    VIN 1 Engine
    1. Before servicing the vehicle, refer to the Precautions section.
    2. Relieve the fuel system pressure.
    3. Drain the cooling system.
    4. Remove or disconnect the following:
      Negative battery cable Supercharger Thermostat housing Exhaust Gas Recirculation (EGR) tube at the intake manifold Engine Control Temperature (ECT) sensor Intake manifold
    To install:
    1. Install or connect the following:
      Intake manifold with new gaskets. Torque the bolts, working from the center out, to 11 ft. lbs. (15 Nm). ECT sensor connector EGR tube to the intake manifold Thermostat housing Supercharger Negative battery cable
    2. Refill and bleed the cooling system.
    3. Run the engine and check for leaks and proper engine operation.

    VIN K Engine
    1. Before servicing the vehicle, refer to the Precautions section.
    2. Disconnect the negative battery cable.
    3. Drain the cooling system.
    4. Relieve the fuel system pressure.
    5. Remove or disconnect the following:
      Fuel injector sight shield Air inlet duct Spark plug wires from the right side Manifold Absolute Pressure (MAP) sensor Vacuum lines from the intake manifold Fuel lines Fuel injector electrical connectors Fuel regulator vacuum line Fuel rail from the intake manifold Exhaust Gas Recirculation (EGR) heat shield Throttle cable bracket from the cylinder head mounting bracket and the throttle body cables Throttle body support bracket Upper intake plenum and gasket Thermostat housing Electrical connector from the Engine Coolant Temperature (ECT) sensor Drive belt tensioner assembly EGR valve outlet pipe Lower intake manifold

      a5adffa.jpg
      Fig. Exploded view of the intake manifold and related components-3.8L (VIN K) engine
    To install:


    140d431.jpg
    Fig. Upper intake manifold torque sequence-3.8L (VIN K) engine


    4950e4f.jpg
    Fig. Lower intake manifold torque sequence-3.8L (VIN K) engine
    1. Install or connect the following:
      Intake manifold using new manifold gaskets. Torque the bolts in sequence to 11 ft. lbs. (15 Nm); then, re-torque to 11 ft. lbs. (15 Nm). EGR valve outlet pipe Drive belt tensioner assembly. Torque the tensioner bolts to 37 ft. lbs. (50 Nm). Electrical connector to the ECT sensor Thermostat housing Upper intake plenum. Torque the intake plenum bolts to 88 inch. lbs. (10 Nm). Throttle body support bracket Throttle cable bracket to the cylinder head mounting bracket and the cables to the throttle body lever EGR heat shield Fuel rail. Torque the fuel rail bolts to 88 inch. lbs. (10 Nm). Fuel lines Fuel regulator vacuum line Fuel injector electrical connectors Vacuum lines to the intake manifold MAP sensor Spark plug wires Fuel injector sight shield and air inlet duct Negative battery cable
    2. Refill and bleed the cooling system.
    3. Run the engine and check for leaks and proper engine operation.

    Hope this help (remember rated this).

    May 17, 2010 | 2001 Pontiac Bonneville

    1 Answer

    Hot do you take off a 98 GMC 5.7 vortec intake


    Note, removing the upper intake manifold is not necessary when removing lower intake manifold, they are removed as an assembly.
    Disconnect negative battery cable. Drain cooling system. Remove air cleaner assembly and inlet duct. Mark and remove distributor. Remove upper radiator hose at thermostat housing. Disconnect accelerator and cruise control cables. Remove heater hoses from intake manifold. Remove EGR pipe.
    Disconnect fuel lines at rear of engine. Remove AC compressor and set aside(leave hoses connected). Remove canister purge solenoid. Disconnect theSCPI injector, ignition coil, Ignition Control Module, generator,IAC motor, TP sensor, O2 sensor, Exhaust Gas Recirculation valve and Engine Coolant Temperature sensor wiring harness connectors. Remove PCV valve and hose. Remove lower intake manifold bolts. Remove lower intake manifold.
    Installation.
    Always use New O-rings when reconnecting fuel lines at rear of engine. Apply a bead of RTV silicone sealer along the front and rear sealing surfaces of the block.See Fig.6. Install new gaskets and intake manifold on block while RTV is still wet to the touch. Use Threadlock 12345382 or equivalent to lower intake manifold bolts. Tighten lower intake manifold bolts in sequence to specification table. See fig. 7. To complete installation, reverse removal procedure.f52665d.gifabc2b5f.gif

    Oct 10, 2009 | 1998 GMC Sierra

    1 Answer

    How do you seperate upper intake manifold from injector assembly


    There is a o-ring around the injector assembly,it is probably stuck to the upper plenum.Try gently prying on both sides of upper plenum at same time.

    Aug 03, 2009 | 1996 Chevrolet G20

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