Question about 1990 Ford F150

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I have a 90 f150 with a 5.8 eng gas is getting in the oil.

I have installed a intake gasket and fuel pressure regulator. Still have the same problem. Any suggestion?

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  • Angelo Attard
    Angelo Attard May 11, 2010

    whay problems are u having and what have u changed

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A leaky fuel injector

Posted on Dec 27, 2008

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Why is there gas in the intake tube?


You mean gas in the air intake??

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Dirty spark plug


Dirty or burnt if its black and sooty your burning oil so its leaking at the intake gasket head gasket piston ring or valve cover gasket(if the plug installs through the top of valve cover) if its light brown and dry your not getting enough fuel(a lean condition) depending on vehicle it can be a variety of things dirty or clogged injectors, bad fuel pressure(regulator pump or clogged fuel filter) if the plug if wet and smells like gas its bad spark(coil,coil pack, the plate the coil packs mount to, bad cam sensor) if its wet and doesn't smell like gas you could be leaking coolant into the cylinder(ie bad head or intake gasket or cracked block) let me know more about the vehicle and more descriptive dirty plug

Jan 11, 2012 | Cars & Trucks

1 Answer

How to replace head gasket on 4 cylander


2.6L Engine
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Drain the cooling system.
  3. Relieve the fuel system pressure.
  4. Remove or disconnect the following:
    • Negative battery cable
    • Hood
    • Accessory drive belts
    • Accelerator cable
    • Positive Crankcase Ventilation (PCV) valve and hose
    • Air intake duct
    • Fuel pressure regulator vacuum line
    • Canister hose
    • Brake booster vacuum line
    • Engine wiring harness connectors at right wheel housing
    • Ground cable connector at the intake manifold, starter and firewall
    • Heated Oxygen (HO2S) sensor connector
    • Alternator wiring connectors
    • Oil pressure switch connector
    • Starter motor harness connectors
    • Ignition coil connector
    • Spark plug wires
    • Distributor
    • Exhaust front pipe
    • Exhaust Gas Recirculation (EGR) gas temperature sensor connector
    • Air pump
    • EGR pipe
    • Heat shield
    • Exhaust manifold
    • Throttle Position (TP) switch connector
    • Cooling fan
    • Water pump pulley
    • Power steering pump
    • Intake manifold
    • Crankshaft pulley
    • Front cover
    • Timing belt. Refer to the Timing Belt unit repair section.
    • Valve cover
    • Rocker arms
    • Camshaft
    • Cylinder head
Cylinder head bolt loosening sequence - 2.6L engine

tecnovative_96.gif
  1. To install:
  2. NOTE: Refer to Section 1 of this manual for the cylinder head torque sequence illustration. The illustration is located after the Torque Specification Chart.
  3. NOTE: Lubricate the cylinder head bolts with clean engine oil for assembly.
  4. Install the cylinder head with a new gasket. Tighten the bolts in sequence as follows:
  5. Step 1: 58 ft. lbs. (75 Nm)
  6. Step 2: 72 ft. lbs. (98 Nm)
    1. Install or connect the following:
    2. Camshaft
    • Rocker arms
    • Valve cover
    • Timing belt
    • Front cover
    • Crankshaft pulley. Tighten the bolt to 87 ft. lbs. (128 Nm).
    • Intake manifold
    • Power steering pump
    • Water pump pulley
    • Cooling fan
    • TP switch connector
    • Exhaust manifold
    • Heat shield
    • EGR pipe
    • Air pump
    • EGR gas temperature sensor connector
    • Exhaust front pipe
    • Distributor
    • Spark plug wires
    • Ignition coil connector
    • Starter motor harness connectors
    • Oil pressure switch connector
    • Alternator wiring connectors
    • HO2S sensor connector
    • Ground cable connector at the intake manifold, starter and firewall
    • Engine wiring harness connectors at right wheel housing
    • Brake booster vacuum line
    • Canister hose
    • Fuel pressure regulator vacuum line
    • Air intake duct
    • PCV valve and hose
    • Accelerator cable
    • Accessory drive belts
    • Hood
    • Negative battery cable
    1. Fill the cooling system.
    2. Start the engine and check for leaks.

    tecnovative_65.jpg

    Feb 05, 2011 | 1997 Isuzu Rodeo

    1 Answer

    Overreving with no power and excessive gas consumption air filter cleaned map sensor replaced fuel pump and filter


    usually caused by busted diaphram in fuel pressure regulator allowing fuel to be drawn thru regulator directly to intake manifold. Pull vacuum line off regulator, plug line with golf tee, start car and watch to see if gas comes out of regulator. If yes, turn off car, replace regulator. The regulator sits near the fuel rail on the top of the engine as shown below. I will paste replacement instructions below from autozone.com in case you need to replace the regulator. Please let me know if you have any questions.
    jturcotte_421.gif


    Removal & Installation

    4.2L Engine

    1. Relieve the fuel system pressure.
    2. Remove the air cleaner outlet resonator.
    3. Disconnect the engine wiring harness from the retaining clips at the front of the engine.
    4. Disconnect the fuel pressure regulator vacuum line.
    5. Clean any dirt from the fuel pressure regulator and the surrounding area.
    6. Disconnect the fuel return pipe.
    7. Remove the fuel return pipe retainer.
    8. Remove the fuel pressure regulator retainer.
    9. Remove the fuel pressure regulator.
    10. Inspect the regulator filter screen for contamination. If contaminated, replace the fuel pressure regulator.

    To install:
    1. Install the regulator filter.
    2. Install the new O-ring on the fuel pressure regulator.
    3. Lubricate the fuel pressure regulator O-ring with clean engine oil.
    4. Push the fuel pressure regulator into the regulator housing on the fuel rail.
    5. Install the fuel pressure regulator retainer. Tighten the regulator retainer screw to 71 inch lbs. (8 Nm).
    6. Install the fuel return pipe retainer. Tighten the return pipe retainer screw to 71 inch lbs. (8 Nm).
    7. Connect the fuel return pipe.
    8. Connect the fuel pressure regulator vacuum line.
    9. Connect the negative battery cable.
    10. Inspect for leaks:
      1. Turn ON the ignition for 2 seconds.
      2. Turn OFF the ignition for 10 seconds.
      3. Turn ON the ignition.
      4. Inspect for fuel leaks.

    11. Install the engine wiring harness into the retaining clips at the front of the engine.
    12. Install the air intake resonator.

    Dec 08, 2010 | 2002 Chevrolet TrailBlazer

    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

    1 Answer

    If i put a little gas in the carberator and fight with my blazer it will start and stay started, but if i leave it for awhile, it will turn over but not start. i cant figure out if it is electric or...


    Get a fuel pressure gauge and connect it to the rail for the fuel injectors to read pressure.

    If the pressure is too low, it might be a bad fuel pressure regulator or pump:

    Fuel Pressure Regulator Removal & Installation 2.2L Engine To Remove:
    1. Relieve the pressure in the fuel system.
    2. Disconnect the negative battery cable.
    3. Disconnect the vacuum hose from the fuel pressure regulator.
    4. Remove the pressure regulator mounting screw.
    5. Remove the fuel pressure regulator assembly with O-ring. Inspect filter screen for contamination. If contaminated, remove and discard.
    Fuel pressure regulator removal/installation (2.2L SFI engine) gm-05-22-619.gif

    To Install:
    1. Apply clean engine oil to the new pressure regulator O-ring and install the O-ring on the regulator.
    2. Install the regulator on the fuel rail. Apply thread-locker to the mounting screw.
      • Tighten the screw to 106 lb in (12Nm).
    3. Connect the negative battery cable.
    4. Use the following procedure to pressurize the fuel system and check for leaks;
    5. Turn the ignition ON for 2 seconds.
    6. Turn the ignition OFF for 10 seconds.
    7. Turn the ignition switch back ON to run the fuel pump again and pressurize the fuel system.
    8. Check the fuel rail assembly for fuel leaks.
    4.3L Engine RPO L35 To Remove:
    4.3L (RPO L35) Fuel meter body assembly gm_trk_sil15_02-04_43_fuel_metr_body_assy.gif

    1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section
    2. Remove or disconnect the following:
      • Upper intake manifold (See: Upper Intake Manifold)
      • Fuel pressure regulator retainer clip (M) and discard the clip
      • Regulator (N) from the housing by twisting and pulling the fuel pressure regulator (N) and using a shop towel to catch any spilled fuel
      • Regulator seal O-ring (R) and discard the O-ring seal
      • Regulator filter (Q) and discard the filter
      • Regulator seal O-ring (P) and discard the O-ring seal
      • Backup ring (O) and discard the ring
    3. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system
    To Install:
    4.3L (RPO L35) Fuel meter body assembly gm_trk_sil15_02-04_43_fuel_metr_body_assy.gif

    1. Lubricate the NEW O-ring seals with clean engine oil
    2. Assemble the following new parts to the fuel pressure regulator:
      • Backup ring (O)
      • Regulator seal O-ring (P)
      • Regulator filter (Q)
      • Regulator seal O-ring (R)
    3. Install or connect the following:
      • Fuel pressure regulator with the vacuum tube pointing down
      • Fuel pressure regulator retainer clip (M)
      • Upper manifold
    4. Test drive the vehicle to confirm the repairs
    RPO LU3 To Remove:
    4.3L (RPO LU3) Fuel meter body assembly gm_trk_sil15_02-04_43_rpolu3_fuel_metr_body_assy.gif

    1. Before servicing the vehicle, refer to the Cautions and Warnings in the beginning of this section
    2. Remove or disconnect the following:
      • Upper intake manifold
      • Fuel pressure regulator retainer clip (E)
      • Regulator (F) from the housing by twisting and pulling the fuel pressure regulator (F) while using a shop towel to catch any spilled fuel
      • Regulator seal O-ring (J) and discard the O-ring seal
      • Regulator filter (I) and discard the filter
      • Regulator seal O-ring (H) and discard the seal
      • Backup ring (G) and discard the backup ring
    3. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system
    To Install:
    4.3L (RPO LU3) Fuel meter body assembly gm_trk_sil15_02-04_43_rpolu3_fuel_metr_body_assy.gif

    1. Lubricate the NEW O-ring seals with clean engine oil.
    2. Assemble the following new parts to the fuel pressure regulator:
      • Backup ring (G)
      • Regulator seal O-ring (H)
      • Regulator filter (I)
      • Regulator seal O-ring (J)
    3. Install or connect the following:
      • Fuel pressure regulator (F) with the vacuum tube pointing down
      • Fuel pressure regulator retainer clip (E)
      • Upper intake manifold
    4. Test drive the vehicle to confirm the repairs
    prev.gif next.gif

    Nov 04, 2010 | 2002 Chevrolet Blazer

    2 Answers

    I have fuel in the oil


    Sounds like a top end repair of seals or a piston ring issue, or the intake manifold gaskets are leaking. With the age of the vehicle you may be able to go with the intake gasket first but if its the heads then you have to do it twice, and if its the rings allowing blow by you would have to take the heads off anyway. Just be careful so you get it narrowed down quick and easy check compression to see about blowby and the head may help.

    Apr 29, 2010 | 1994 GMC Jimmy

    1 Answer

    Where is fuel pressure regulatore located


    For 2000 Chevrolet Truck Blazer 4WD 4.3L SFI 6cyl
    If your engine is a 4.3L V-6 with CPI (central point injection) it is inside the upper intake manifold. The upper intake manifold is bolted on top of the normal intake manifold.

    The throttle body is mounted on it and your fuel lines terminate into the center of this.


    Removal & Installation
    1. Relieve the fuel system pressure.
    2. Remove the air cleaner outlet resonator.
    3. Disconnect the engine wiring harness from the retaining clips at the front of the engine.
    4. Disconnect the fuel pressure regulator vacuum line.
    5. Clean any dirt from the fuel pressure regulator and the surrounding area.
    6. Disconnect the fuel return pipe.
    7. Remove the fuel return pipe retainer.
    8. Remove the fuel pressure regulator retainer.
    9. Remove the fuel pressure regulator.
    10. Inspect the regulator filter screen for contamination. If contaminated, replace the fuel pressure regulator.
    To install:


    aaf5240.jpg
    Fig. Fuel pressure regulator-4.2L engine
    1. Install the regulator filter.
    2. Install the new O-ring on the fuel pressure regulator.
    3. Lubricate the fuel pressure regulator O-ring with clean engine oil.
    4. Push the fuel pressure regulator into the regulator housing on the fuel rail.
    5. Install the fuel pressure regulator retainer. Tighten the regulator retainer screw to 71 inch lbs. (8 Nm).
    6. Install the fuel return pipe retainer. Tighten the return pipe retainer screw to 71 inch lbs. (8 Nm).
    7. Connect the fuel return pipe.
    8. Connect the fuel pressure regulator vacuum line.
    9. Connect the negative battery cable.
    10. Inspect for leaks:
      1. Turn ON the ignition for 2 seconds.
      2. Turn OFF the ignition for 10 seconds.
      3. Turn ON the ignition.
      4. Inspect for fuel leaks.
    11. Install the engine wiring harness into the retaining clips at the front of the engine.
    12. Install the air intake resonator.
    Hope help with this (remember rated this post).

    Feb 26, 2010 | 2000 Chevrolet Blazer

    2 Answers

    Have gas in engine oil


    HI, this unfortunate leakage of gas into your oil is being caused be a faulty fuel pressure regulator. there is a diaphragm in the fuel pressure regulator assembly that may have ruptured, in return, sending small amounts of fuel into the intake, via the vacuum line that connects the regulator to the intake.

    simply replacing the fuel pressure regulator will fix this issue.

    Please rate and god bless:)

    Apr 18, 2009 | Ford Ranger Cars & Trucks

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