Question about 1985 Ford F 250

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My f250 is leaking fuel disel around the intake

My f250 is leaking fuel disel around the intake manifold i just removed the manafold and the gasket looks ok

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This worked for my dads truck, it was a $60 fix take a look

http://www.youtube.com/watch?v=Qlu4V6VN8ec

Posted on Dec 20, 2012

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You should check the injectors and their seals. Unless a line is leaking that is where you'll find the problem.

Posted on Jun 03, 2010

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Replaced intake manafold, now car not running right, sounds like missing on some of the cylinaders


You did put on new intake gaskets didn't you? If yes, did you clean the gasket mating surfaces before reassembly? Did you properly (and in the correct sequence) torque down the intake manifold bolts?

Sounds to me like a intake vacuum leak, at the least.

Feb 01, 2011 | Ford Mustang Cars & Trucks

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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

Water coming out intake manafold


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Dec 23, 2010 | 1991 Ford F250

1 Answer

P 0171 p left bank lean p 0174p right bank lean on f250 2004


check for vacuum leaks, especially on intake manifold gaskets. I use carb cleaner or ether to spray around. If engine revs where I spray, there's the leak. If this doesn't solve, please let us know.

Sep 15, 2010 | Ford F-250 Cars & Trucks

2 Answers

Need to replace the intake manifold


3.8L Engine (most common) Upper Intake Manifold To Remove:
  1. Drain the cooling system.
  2. Remove or disconnect the following:
    • Negative battery cable.
    • Fuel injector sight shield.
    • Air cleaner intake duct.
    • Right spark plug wires from the ignition control module and reposition.
  3. Relieve the fuel pressure.
  4. Remove or disconnect the following:
    • Fuel rail assembly.
    • Brake booster hose from the vacuum source manifold in the upper intake manifold.
    • Exhaust Gas Recirculation Valve (EGR) wiring harness heat shield nut, bolt and the EGR heat shield.
    • Throttle body support bracket upper bolt.
  5. Disconnect the electrical connectors from the following:
    • EVAP purge solenoid
    • Throttle Position (T/P) sensor
    • Idle Air Control (IAC) valve
    • Manifold Absolute Pressure (MAP) sensor
    • Mass Air Flow (MAF) sensor
    • EVAP purge solenoid vacuum line from the throttle body.
    • Accelerator and the cruise control cables with the bracket from the throttle body.
  6. Remove or disconnect the following:
    • Upper intake manifold bolts and stud.
    • Clean the upper intake manifold bolt threads.
  7. Remove or disconnect the following:
    • Upper intake manifold by lifting the back of the intake and sliding the manifold forward from the throttle body support bracket.
    • Upper-to-lower intake manifold carrier gasket from the upper intake manifold.
  8. If the upper intake manifold is being replaced, remove the following:
    • Throttle body assembly.
    • Manifold Absolute Pressure (MAP) sensor.
    • Positive Crankcase Ventilation (PCV) valve.
    • Vacuum source manifold.
Upper intake manifold bolt torque sequence (3.8L engine) gm-03-38-530.gif

To Install:
  1. If the manifold was replaced, install or connect the following:
    • Vacuum source manifold.
    • Positive Crankcase Ventilation (PCV) valve.
    • Manifold Absolute Pressure (MAP) sensor.
    • Throttle body assembly.
    • Upper-to-lower intake manifold carrier gasket to the upper intake manifold.
  2. Carefully place the upper intake manifold onto the lower intake manifold. Ensure that the alignment pins in the upper intake manifold align with the holes in the lower intake manifold. NOTE: Apply thread lock compound, to the bolt threads before assembly.
  3. Install or connect the following:
    • Upper intake manifold. Tighten the upper intake manifold bolts in sequence to 89 in lbs (10 Nm)
    • Accelerator and the cruise control cables with the bracket to the throttle body.
    • EVAP purge solenoid vacuum line to the throttle body.
  4. Connect the electrical connectors to the following:
    • Mass Air Flow (MAF) sensor
    • Manifold Absolute Pressure (MAP) sensor
    • Idle Air Control (IAC) valve
    • Throttle Position (T/P) sensor
    • EVAP purge solenoid
  5. Install or connect the following:
    • Throttle body upper support bracket bolt. Tighten the bolt to 89 in lbs (10 Nm)
    • EGR valve wiring harness heat shield, nut and the bolt. Tighten the nut and the bolt to 89 in lbs (10 Nm)
    • Brake booster hose to the vacuum source manifold.
    • Fuel rail assembly.
    • Right spark plug wires.
    • Air cleaner intake duct.
    • Fuel injector sight shield.
  6. Connect the negative battery cable.
  7. Fill the cooling system.
  8. Inspect for fluid or vacuum leaks.
Lower Intake Manifold (W/O Supercharger) To Remove:
  1. Remove or disconnect the following:
    • Upper intake manifold.
    • Generator brace.
    • Drive belt tensioner with the mounting bracket and the heater water bypass inlet pipe.
    • Exhaust gas recirculation EGR outlet pipe bolt from the lower intake manifold.
    • Radiator inlet hose from the water outlet housing.
    • ECT sensor electrical connector.
    • Right upper engine mount strut bracket.
    • Generator brace bracket bolts.
    • Generator brace bracket.
    • Lower intake manifold bolts.
    • Lower intake manifold.
    • Lower intake manifold seals.
    • Lower intake manifold gaskets.
  2. If replacing the lower intake manifold, Remove or disconnect:
    • Water outlet housing bolt and stud
    • Water outlet housing
    • Gasket and the thermostat.
    • ECT sensor.
  3. Inspect the flatness of inlet flanges.
  4. Clean the intake manifold mating surfaces.
  5. Clean the intake manifold bolts and bolt holes of adhesive compound.
To Install:
  1. If removed, install the ECT sensor.
    • Tighten the ECT sensor to 18 ft. lbs. (25 Nm)
  2. If removed, install the thermostat, the gasket, and the water outlet housing.
  3. If removed, install the water outlet housing bolt and the stud.
    • Tighten the bolt and stud to 20 ft. lbs. (27 Nm)
  4. Install or connect the following:
    • Lower intake manifold gaskets. NOTE: Apply sealer GM P/N 12346286 (Canadian P/N 10953472) or equivalent to the ends of the intake manifold seals.
    • Lower intake manifold seals.
    • Lower intake manifold.
    • Lower intake manifold bolts.
    NOTE: Apply thread lock compound GM P/N 12345382 (Canadian P/N 10953489) or equivalent to the two hidden bolts and ensure they are installed.
  5. Tighten the lower intake manifold bolts in sequence to 11 ft. lbs. (15 Nm) gmpc_v6_5.gif

  6. Install or connect the following:
    • Generator brace bracket.
    • Generator brace bracket bolts. Tighten the bolts to 37 ft. lbs. (50 Nm)
    • Right upper engine mount strut bracket.
    • ECT sensor electrical connector.
    • Radiator inlet hose to the water outlet housing.
    • EGR outlet pipe to the lower intake manifold.
    • EGR outlet pipe bolt to the lower intake manifold. Tighten the bolt to 21 ft. lbs. (29 Nm)
    • Drive belt tensioner.
    • Generator brace.
    • Upper intake manifold.
  7. Inspect for leaks.
Lower Intake Manifold (W/ Supercharger) To Remove:
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Remove the supercharger.
  4. Remove the thermostat housing.
  5. Remove the EGR pipe at the intake manifold.
  6. Disconnect the electrical connection at the temperature sensor.
  7. Remove the intake manifold and gaskets.
NOTE: The coolant bypass tube will release from the intake manifold when the manifold is removed.
To Install:
  1. Clean the gasket sealing surfaces.
  2. Install the intake manifold gaskets.
  3. Align the coolant bypass tube with the opening in the intake manifold and install the manifold. Tighten the bolts to 11 lb ft (15 Nm).
  4. Install the electrical connector to the temperature sensor.
  5. Install the EGR pipe to the intake manifold.
  6. Install the thermostat housing.
  7. Install the supercharger.
  8. Fill the cooling system.
  9. Connect the negative battery cable.

Aug 05, 2010 | 1997 Pontiac Grand Prix

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2000 ford f250 diesel in watter


Bad intake manifold gasket, head gasket, manifold pre-heat gasket, or any combination of them.

Feb 22, 2010 | 2000 Ford F250 Super Duty Crew Cabs

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Ford truck f250 v8 motor idles high after engine heats up it idles higher cant find a vacuum leak replaced a idle air valve it didnt help


the vacuum leak that causes this high idle is the gasket at the bottom of the upper intake manifold runners, they **** in, done 100's. to confirm this just spray carb cleaner at inside and outside base, when u hit the leak you will hear it. see photo.

29f44ce.jpg

May 10, 2009 | 1992 Ford F250

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