Question about Toyota 4Runner

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So now I think that I had air getting in the "MAF" so I took it back off checked all the bolts, is there a gasket that goes on were the bolts connect?

Used carburetor cleaner and can tell it is still getting air.

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Check for a crack on the intake hose. Large 2 1\2" hose at throttle body. Does the idle increase when you spray the carb cleaner. If it does you are spraying huge leak. There are no gaskets for the bolts. But may be an orang missing for the maf sensor

Posted on May 04, 2014

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Posted on Jan 02, 2017

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SOURCE: check engine light came on after throttle intake cleaner was used

it possibly clogged the o2 sensors when it cleaned the gunk out and the maf might even be on the air box or bolt on the intake directly or it can be in the tube but probbably need to check and see what the codes are with a scanner

Posted on Aug 15, 2009

  • 2299 Answers

SOURCE: 2002 silhouette: How do I get

There should be 3 bolts that hold the housing on. Are you sure that you are in the right spot? Here is a link to a site that gives instructions how to change this thermostat.
If this doesn't help then let me know and I will try to explain more. Thanks!

Posted on Nov 17, 2010

  • 357 Answers

SOURCE: i have a 1987 toyota

The 22R engine is one of the best engines Toyota built.

With the head off, you should have had the head gasket surface machined and the head checked pressure checked for cracks. It seems you did so.

I can only assume, you MAY have put the bolts back in without bowing out the cylinder block bolt holes before installing the bolts. These bolt holes fill with oil and antifreeze when you remove the head.

Doesn't matter how careful you are, the bolt holes always fill with fluid.

If so, the bolt torque would be reached before full clamping of the cylinder head. Worst of all, the block could have been cracked by the hydraulic pressure in the bolt hole as you tightened the bolt.

Posted on Jan 25, 2011

  • 369 Answers

SOURCE: I have a 2003 Expedition

O2 sensors both but couldnt tell you if its upstream or down stream.

Posted on Feb 09, 2011

  • 493 Answers

SOURCE: Where does the long (30 inch) vacuum hose from the Air cleaner hook on?

You should be able to hear a sucking sound from where the line is supposed to go. Probably on the base of the carby. You can spray a little aero start around where you think the leak might be ie: carby. the aero start will be sucked into the open vacume port & the revs of the motor will change. Sorry I don't know exactly where it goes.

Posted on Jun 29, 2012

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2003 Buick Century just quits running going down the road. Keeps throwing a code for the MAF sensor. We have replaced this several times. It will run fine for a couple months then it does it again.

Why would you think the issue is with the MAF, did you do the diagnostic testing? What was the fault code? MAF sensors seldom fail. I would look for loss of fuel pressure or spark maybe. I think the MAF fault is due to the other problem and it is not the cause of it but a symptom.

Oct 31, 2016 | 2003 Buick Century

2 Answers

I took my car to have it checked at Autozone. The results were OEM Number to Cross: P0102. What is wrong with my car?

P0102 refers to the MAF (Mass Air Flow) sensor. It may be dirty, faulty, or have a bad connection. Possible remedies are:

  • Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires.
  • Inspect for any air leaks near the MAF sensor.
  • Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor.
  • Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information)
  • Replace the MAF sensor.

Jul 31, 2011 | 2001 Hyundai Santa Fe

1 Answer

Removing no 1 spark plug

Start by taking the intake apart. Loosen (8MM) the clamp to the MAF sensor and the clamp to the throttle body (8MM). Take the air line off the front of the resonator (one that goes to the pressure regulator). Two 10mm bolts hold the resonator on (passenger side- next to the air intake ducting), take them off. Disconnect the MAF sensor connector.

Remove air ducting with resonator. [There will be another line connected to the resonator in back, it goes to the valve cover vent. Make sure not to lose it!! It is 1/2 rubber line.]

10mm socket will loosen the ignition coil that sits on top the spark plugs. You may want to unplug the coils. Once that is unscrewed, you can pull that straight up and off out of the cylinder

Get your 5/8 spark plug socket, connect the 5" extension and 3" extension to it and send it down to get a hold of the plug. [I recommended a breaker bar because some are on there REALLY tight!!] Attach your socket and loosen the spark plug and pull it out.

Feb 09, 2011 | 2005 GMC Canyon

1 Answer

How do i install a master air flow sensor and where is it located and how long does it take and cost for the part?

It depends on which engine you have, but can be done in about 30 minutes in each case. I have pasted the procedure from below. The cost is $200.


2RZ-FE and 3RZ-FE Engines
See Figure 2

  1. Disconnect the MAF harness and the IAT harness along with the wire clamps.
  2. Loosen the are cleaner hose clamp.
  3. On the 3RZ-FE, disconnect the air hose from the air cleaner cap.
  4. Loosen the four clips, then the air cleaner cap with the meter attached.
  5. Remove the four nuts, MAF meter and gasket from the cap.


Fig. Fig. 2: Exploded view of the MAF meter on the 2RZ-FE and 3RZ-FE engines

  1. Discard the gasket.

To install:
  1. Place a new gasket on the air cleaner cap.
  2. Install the MAF meter and tighten the nuts to 74 inch lbs. (8 Nm).
  3. Install the meter and cap assembly on the air cleaner housing.

5VZ-FE Engine
See Figure 3
  1. Disconnect the air cleaner cap from the MAF meter.
  2. Detach the harness from the meter.
  3. Remove the mounting bolts for the meter. Lift off the meter and discard the gasket.


Fig. Fig. 3: Remove the bolts securing the meter

To install:

  1. Place a new gasket in position, then tighten the meter to the cap assembly, 61 inch lbs. (7 Nm).
  2. Attach the meter and cap assembly to the air cleaner housing.

1FZ-FE Engine
  1. Disconnect the MAF meter harness and wire clamps.
  2. Separate the cruise control actuator cable from the unit.
  3. Loosen the air cleaner hose.
  4. Disconnect the 3 clips, then remove the wing nut, air cleaner cap and meter assembly.
  5. Unbolt the meter from the cap. Discard the gasket.
To install:
  1. Secure the MAF meter to the cap with a new gasket.
  2. Install the cap/meter assembly to the air cleaner housing.
  3. Attach the air cleaner hose to the unit.
  4. Attach the cruise control actuator cable.
  5. Connect the MAF meter harness and wire clamps.

Oct 28, 2010 | 1994 Toyota Pickup

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

1 Answer

How to repair a supercharger

Fig. 1: Supercharger assembly and related parts 84303024.gif

  1. Disconnect the negative battery cable.
  2. Remove the accessory drive belt from the supercharger pulley.
  3. Relieve the fuel pressure and remove the fuel injector sight shield.
  4. Disconnect the fuel pipes from the fuel rail and vacuum hose at the pressure regulator.
  5. Disconnect the electrical connectors from the fuel injectors and remove the fuel rail mounting bolts. Remove the fuel rail with the injectors intact.
  6. Disconnect the electrical connectors at the IAC, TPS, MAF, EGR and boost control solenoid. Lay the wiring harness aside.
  7. Remove the air intake duct and remove the EGR pipe from the supercharger.
  8. Disconnect the throttle cable and the cruise control cable. Remove the cable bracket.
  9. Remove the tensioner bracket to supercharger mounting stud.
  10. Remove the supercharger to intake manifold bolts, remove the supercharger from the intake manifold. Remove the supercharger gasket and coolant passage O-rings. To install:
  11. Replace the oil passage O-rings and the supercharger gasket.
  12. Install the supercharger and bolts. Install the tensioner bracket-to-supercharger bolt. Tighten the bolts to 19 ft. lbs. (26 Nm).
  13. Install the cable bracket and connect the throttle and cruise control cables.
  14. Connect the EGR pipe to the supercharger and install the air intake duct.
  15. Connect the electrical connectors to the IAC, TPS, MAF, EGR and boost control solenoid.
  16. Install the fuel rail and bolts and tighten the bolts to 15 ft. lbs. (24 Nm).
  17. Connect the connectors to the fuel injectors and the vacuum hoses at the pressure regulator.
  18. Connect the fuel pipes to the fuel rail and install the fuel injector sight shield.
  19. Install the accessory drive belt to the supercharger and connect the negative battery cable.

Jul 14, 2010 | 1992 Buick Park Avenue

2 Answers

Windstar 2000 3.8. Runs fine. Checked for codes and got p0171 and p0174. Cleaned the MAF sensor. Went to erase codes and found the there is a third one in there now. p0113. What is wrong?

The upper intake manifold gaskets and isolators (the bolts that hold the manifold down) leak and cause the p0171 and p0174. The reason they leak is due to a missing baffle in the front valve cover which allows some oil into the upper intake which swells the gaskets and wears them. The manifold gaskets and valve cover should be replaced. But before having this done check to see if the black plastic hose on the back of the rubber intake hose(between the throttle body and maf) has dislodged. This happens alot when a new air filter is installed and will cause the same codes.

Mar 30, 2010 | 2000 Ford Explorer

1 Answer

How to change thermostat on 1994 grandam

This is definitely a harder change than it needed to be, but I'm sure it's nothing you can't handle. The first thing is to locate the housing where the thermostat is. You can do this by following the top radiator hose from the radiator to the engine block.
You will find a round casting connected to the intake with two bolts in it. You simply remove those bolts and place a new thermostat in the housing clean off the old gasket material and place a new gasket and sealer on the housing and bolt it back on making sure to tighten the bolts evenly so you don't crack the housing. This all sounded simple, didn't it?

The trick is getting to the housing because the air intake system is in the way. Loose the air intake system and pulled it back and that took some time. There are some small water coolant lines underneath that were a pain to get off and back on. Replace the factory clamps with some good screw clamps to help the next fellow, but there were still not fun.

Nov 19, 2009 | 1996 Pontiac Grand Am

2 Answers

No power with a 5.4 liter

P0171 and P0174 is a lean condition in your air/fuel ratio. This is common to a dirty MAF, IAT Sensor. You can buy a can of MAF sensor cleaner at Auto Zone or any other large auto parts store and just follow the instruction on the can. IF the reading from the MAF and IAT sensor's are incorrect, the PCM is thinking that the engine is getting to much gas so it's leaning the air/fule mixture out to much and your getting the dtc code for a lean mixture in your engine. That is causing you the lack of power since your not getting the right amount of air/fuel ratio in your engine which should be 14.7:1, anything more then that will be at a lean condition and prone to knocking (detonation) or miss fire. Good luck and hope this helps. keep me posted. be glad to help

Jun 08, 2009 | 2006 Ford F 350 Super Duty

1 Answer

Mass air flow sensor on a 1995 dodge stratus is located where?

Try to unplug maf sensor and try to start and run. ECM will go to default values. I vehicle starts and runs with sensor discoed then that is the problem. Make sure all connections for air induction between maf an intake are tight and there are no leaks. Air leaks after maf sensor will cause runability issues.

Mar 29, 2009 | 1995 Dodge Stratus

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