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Toyota engine repair questions and answers

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  • keisha
    keisha - 1993 Toyota Camry - Engine - 10/20/2014
    Car overheating! & leaking antifreeze
    I just replaced the radatior and water pump about 3 weeks ago . now my car overheats when idling.. I put antifreeze in the coolant jug but it just disappears fast its always empty & there is coolant everywhere all under my car mainly in the front part of the car on ...
     
    • GT500Knights
      10/20/2014 GT500Knights
      Ensure that the hoses connected to the radiator are completely over the nipple. Ensure that the clamps are tight. If you have the type of clamps that require pliers (spring clamps), they should never be reused. You should replace the clamps with the worm style clamp, it has a hex bolt/Phillips screw to tighten it. Follow he trail of coolant to find the leak. Look topmost and forward most in the engine bay.

      If the overheating occurs in traffic or while stopped, your fan may not be operating properly.

      Check the radiator cap and make sure the rubber seals inside are not cracked, otherwise the system will not be able to maintain pressure.

      Thermostats could be stuck closed.
  • Davon
    Davon - 2002 Toyota Camry - Engine - 10/18/2014
    Blinking A/C light on a 2002 Toyota camery? What could be the problem
    Blinking A/C light on a 2002 Toyota camery? What could be the problem
     
    • Jimm
      10/18/2014 Jimm
      Toyota has issued a service bulletin that corrects this problem, under the hood near the battery locate the fuse/relay block and remove the cover, look inside the cover to identify the "A/C magnetic clutch relay" remove it and check the part number imprinted on it, the defective relay will have the part number 90987-02022, the relay should be replaced with the part number 90987-02028.
  • Ron
    Ron - 1998 Toyota Camry - Engine - 10/15/2014
    Why has my MPG decreased after cleaning throttle body/IACV?
    Cleaned the throttle body/IACV with throttle body cleaner after having idling at start-up issues. Starts up fine now, but my MPG has decreased by about 5mi per gal. Also, just this morning, the car stalled while in traffic. I had to really mash the gas pedal to get ...
     
    • Jimm
      10/9/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
      Jimm
      10/15/2014 Ron
      I asked Advance Auto to read any stored trouble codes and they told me if the check engine isn't lit, then their reader wont be able to see any codes (?). Also, I picked up some NGK Iridium IX plugs to try and they come gapped to 0.44. I haven't checked them yet, but is this the proper gap for these plugs? Thanks!
    • Jimm
      10/15/2014 Jimm
      The local parts store is not telling the truth, any OBD code reader can read / scan the OBD system at any time - regardless if the check engine light is displayed or not.

      Check with another store - and if necessary, remind them that you are looking / scanning for any codes hidden or undisplayed in the OBD system. This is considered as common practice.

      Do this as the next step and before throwing money and parts at the problem.

      Yes, to answer the spark plug gap question - the 0.044" is the correct gap setting.
  • Wong Family
    Wong Family - 2005 Toyota Tundra - Engine - 10/14/2014
    My truck will not start. When i turn the key the car makes a clicking noise and does not turn over. what could be wrong?
    lights, radio, and display turn on
     
    • CVO
      10/14/2014 CVO
      First, check the battery and starter cables for their tightness or free of corrosion and physical damaged.

      See this Starting system simplified diagram. Have a help from an assistant to crank the engine, use a 12 volt light tester or a digital voltmeter, apply it to the starter control circuit.
      If there is light or 12 volts and the starter isn't cranking, then the starter is the culprit. Have the starter to bench test for free at the local auto parts stores.
      If there isn't no light or no volts, then the ignition switch is the culprit.
      Check the starter relay and position the Automatic transmission shifter in neutral.

      http://www.samarins.com/glossary/starter.html

      Note: a 3/4 charge battery is 12.50 volts
      A discharge battery is 11.75 volts.
      A battery under a cranking load and it is reading less than 7 volts,it will be a recycled battery.
  • harold
    harold - 2009 Toyota Camry - Engine - 10/13/2014
    Radio,clock,dome light, won't work
    I change the fuse bar link under the hood and the clock, radio, dome light, won't work what can I do?
     
    0 answer
  • Bob
    Bob - 1998 Toyota RAV4 - Engine - 10/13/2014
    Check engine lamp on. no codes
    vehicle starts and runs fine. no misfires, fuel cap on tight.
     
    • Jimm
      10/13/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.
      There are literally hundreds of possible fault codes - so for sake of simplicity and to assist the diagnosis and repair of the issue you are having, this step is fundamental.
  • Bob
    Bob - 1998 Toyota RAV4 - Engine - 10/13/2014
    Check engine lamp on. No codes
    Vehicle runs fine, no misfires, fuel cap tight.
     
    • Jimm
      10/13/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.
      There are literally hundreds of possible fault codes - so for sake of simplicity and to assist the diagnosis and repair of the issue you are having, this step is fundamental.
  • John Evans
    John Evans - 1989 Toyota Pickup - Engine - 10/13/2014
    My vehicle wont start, not even turn over.
    When i first bought the truck it had this problem but it would start, It stopped last month. This issue has been getting worse every month. I turn my key and my dash lights up but i have no response from the engine. So far I've replaced the: battery, starter, and ...
     
    0 answer
  • Maryann
    Maryann - 1989 Toyota Camry - Engine - 10/12/2014
    Can you help me diagnose 'whineing' sound coming from from my engine.
    First sounded like when your cars low on ps fluid & your trying to turn, but didn't need to be turning to hear. So I had ps pump replaced--mechanic said old had been leaking bad. Now sound is slightly different and not as loud but still, I CAN hear it. Had wrk done ...
     
    0 answer
  • Toyotamom
    Toyotamom - 2007 Toyota Camry - Engine - 10/10/2014
    Can it be determined what failed first between headgasket or radiator that caused car to overheat
    Car ran hot water pump displayed on dash
     
    • Jimm
      10/10/2014 Jimm
      Not particularly - the overheating condition may have been caused by either the radiator or the head gasket. There are also a variety of conditions possible, here are just a few;

      Low coolant level
      Leaking coolant
      Improper coolant concentration (not at recommended 50 / 50 mix of anti-freeze and water)
      Clogged radiator hoses
      Clogged heater hoses
      Clogged radiator passages
      Clogged heater core
      Faulty thermostat
      Faulty water pump
      Faulty radiator cooling fans
      Faulty radiator cooling fan switch (coolant temperature sensor)
      Faulty / worn serpentine drive belt
      Faulty / worn drive belt tensioner
  • Rajiv Basu
    Rajiv Basu - 2006 Toyota Corolla - Engine - 10/10/2014
    My CNG fillter corolla burns the Air filter after running about 2500 KM and Subsequenyly Assymbley after a year
    It has done 100000 Km, and there is no other problem
     
    0 answer
  • Irma. Rocha
    Irma. Rocha - 2007 Toyota Camry - Engine - 10/7/2014
    What is wrong with my air conditioner
    Why does it blow hot air on the driver side vent but cool air on the passenger side vents? It happens all the time. It started about 3 days ago.
     
  • Herb
    Herb - 1985 Toyota Camry - Engine - 10/6/2014
    Rebuilt engine was running fine. Now it starts and dies immediately. Spark is OK - verified.
    Rebuilt engine, ran fine. Leaky stick shift transmission seal caused engine removal. Upon reassembly, the engine starts quickly then immediately dies and will not restart for several minutes. Then the whole process repeats. Spark is fine, no known vacuum leaks. ...
     
    0 answer
  • wvelasquez
    wvelasquez - 2008 Toyota Corolla - Engine - 10/6/2014
    OBDII reads operating problem try again.
    When I connect my obdII scanner to my 2008 Toyota Corolla, all I read is operating error try again,any suggestions to correct this problem?
     
    • Jimm
      10/6/2014 Jimm
      Yes, check the OBD connector and harness -make sure the connection is solid. There are replacement OBD connectors available- along with the wiring pigtail (short length) - via the parts aftermarket.

      You can also simply try a different scan tool - from the local auto parts store, for example - to help pinpoint whether the tool or the OBD port / connector is the issue.

      Check the various on-line vendors; www.autopartswarehouse.com, www.RockAuto.com, www.partsgeek.com, to list only a few. For example, they (RockAuto) list the OBD connector and cable (Airtex / Wells part # 1P1474) from around $38.00 for your vehicle.
  • Enesi
    Enesi - 2001 Toyota Camry - Engine - 10/5/2014
    Why does my car hesitate when I step on the gas?
    This usually happens when the engine is cold though there are isolated cases when its warm and still do that. It sometimes jerks especially when I step all the way down on the gas while driving. It occurs almost any time I drive for the past 6 months The fuel pump ...
     
    • Jimm
      10/5/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires