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Toyota engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 1998 Toyota RAV4 - Engine - 2/25/2014
    What could cause engine to sputter and not fire ?
    Car was running fine, than would run rough,now turns over.sputters a little, but wont start. battery good. seames to be flooded, plugs are wet when checked, added gas stabolizer, no sucess. Tail pipe has carbon, and moisture spray.
     
    • HouseCallAuto
      2/25/2014 HouseCallAuto
      Plug in a code reader and see what fault codes are stored. You can obtain a code reader from amazon for about $20. Update the post with the code numbers. Checking for codes cannot be skipped.
  • AutoMD Member
    AutoMD Member - 2011 Toyota Camry - Engine - 2/25/2014
    Why does my car hesitate when I put on the gas kind of skipping but engine rives?
    Occurs when driving more at lower speeds. I notice it from gas petal and the skip it makes.
     
    • Jimm
      2/25/2014 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
  • AutoMD Member
    AutoMD Member - 2011 Toyota Camry - Engine - 2/25/2014
    Why does my car hesitate when I put on the gas kind of skipping but engine rives?
    Occurs when driving more at lower speeds. I notice it from gas petal and the skip it makes.
     
    • Jimm
      2/25/2014 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
  • AutoMD Member
    AutoMD Member - 2011 Toyota Camry - Engine - 2/25/2014
    Why does my car hesitate when I press the gas?
    Feels like it is skipping. Mainly does it when driving at lower speeds
     
    • HouseCallAuto
      2/24/2014 HouseCallAuto
      Are you comparing this with how the car used to run? Is the check engine light illuminated? Can you buy a code reader from amazon.com for $20 and plug it in and read fault codes that might be presently stored in memory?
    • AutoMD Member
      2/25/2014 AutoMD Member
      you can buy a idiag and iobd2 for read car code, it‘s cheap
      http://www.careucar.com/.../...d-and-iphone.html
    • Jimm
      2/25/2014 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
  • AutoMD Member
    AutoMD Member - 1999 Toyota Land Cruiser - Engine - 2/24/2014
    Where is the TPS located in the engine?
    I want to buy the right fit throttle position sensor for my 1999 Toyota Landcruiser.
     
    • HouseCallAuto
      2/24/2014 HouseCallAuto
      Its right on the throttle body in plain sight. STANDARD MOTOR PRODUCTS Part # TH263
  • AutoMD Member
    AutoMD Member - 1994 Toyota 4Runner - Engine - 2/23/2014
    Doesn't seam like it gets enough gas
    I press on the gas and it takes a long time for the rpms to get up there and shift. It very slow the gas pedal almost seams like it stuck.
     
  • AutoMD Member
    AutoMD Member - 2012 Toyota Corolla - Engine - 2/23/2014
    If i install tubocharger in my car then what parts should i change & why ?
    because turbocharger increase the power then i should use the parts with some extra strength...is it r8t or not
     
    • Jimm
      2/23/2014 Jimm
      There should not be any need for upgraded components; such as pistons, crankshaft or camshafts.

      Try these turbocharger sources for the kits and all the information to install one on your vehicle; www.turbokits.com/Toyota/Corolla, www.andysautosport.com, www.turbospecialties-race.com/turbo-kits-corolla, www.fastwayracer.com - among other sources.

      Typical kits would include the following parts;

      custom spec'd T28 turbocharger
      High SILMoly Ductile Iron Cast 4-1 Manifold
      3" Stainless Mandrel Bent Downpipe
      2"-2.5" Polished Aluminum Charge Piping
      3” Cold Air Intake Pipe
      Polished Front Mount IC (6.25"x18"x3.5")
      Forge Silver Billet BOV
      K&N Air Filter
      (4) 440cc Injectors (Factory Clip Drop In!)
      AEM FIC Fuel Injector Controller Includes Base Map

      AEM FIC Wire In Harness
      Stainless Braided Oil/Water Feed Lines
      Stainless Braided Oil/Water Return Lines
      Black Silicone Intercooler Couplers
      Stainless T-Bolt Clamps
      Mounting Brackets
      All Hardware & Fittings for Install
      Step-by-Step Install Instructions
  • AutoMD Member
    AutoMD Member - 1998 Toyota 4Runner - Engine - 2/23/2014
    Truck is bucking at times
    My 4Runner is "bucking" at times while going up hills, on straight roads, engine could be warm or cold, no apparent pattern, first noticed during the winter months, the check engine light comes on and then goes off, did that prior to this issue, no other problems ...
     
    • Jimm
      2/23/2014 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
  • AutoMD Member
    AutoMD Member - 1998 Toyota 4Runner - Engine - 2/23/2014
    Oxygen sensor needs to be replaced
    Our diagnostic test showed we need an oxygen sensor on the first cylinder of the motor how do we know which is the first cylinder?
     
    • Jimm
      2/23/2014 Jimm
      The oxygen sensors are not cylinder-specific, but are location specific in terms of the catalytic converter. For example, on the V6 engine there are two O2 sensors upstream (ahead) of the catalytic converter - one mounted on the exhaust pipe for each bank of three cylinders.

      Always replace the O2 sensors as sets, or in pairs - due to mileage / age / wear considerations.

      The replacement procedure is easy - remove one wire connection, then unscrew the sensor from the threaded fitting on the exhaust. Usually, you should apply some thread lubricant spray and let soak for some time prior to the removal.

      The installation is the reverse, with these exceptions - use an O2 sensor socket - similar to a deep well socket with a slot cut into to accomodate the wire. Also, be sure to apply a thin amount of anti-sieze to the threads before the installation. Reference the 'How-To-Guides' feature on the AutoMD website for the specific steps.

      The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.
      In fact, they (RockAuto) list the oxygen sensors from around $27.00 (each) for your vehicle.
  • AutoMD Member
    AutoMD Member - 2004 Toyota Corolla - Engine - 2/20/2014
    Why does my toyota voxy 2004 check engine light comes on after 4kms and goes off when engine is stopped and started
    ive never had problems with this car from the day i bought it three years ago the milage so far is 82130 model number CBA-AZR60G engine number 1AZ4932089 rating 1990, car started having problems two months ago the speedo clock went dead while car moving had it ...
     
    • Jimm
      2/20/2014 Jimm
      Replace the output shaft speed sensor on the transmission - or look into the speed sensor wiring / conenection. The speed sensor is held in place by one bolt - once the electrical connection is removed.

      The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.
      In fact, they (RockAuto) list the speed sensor (output shaft) from around $113.00 for your vehicle.
  • AutoMD Member
    AutoMD Member - 1998 Toyota Avalon - Engine - 2/20/2014
    Help! Do I have a leg to stand on here?
    I drive a 1998 Toyota Avalon with approximately 201,000 miles. My check engine light came on last week, so I made an appointment to get it diagnosed and fixed by a mechanic. I asked him what the codes were, he said there were the following codes: 171, 303, 305, 300. ...
     
    • Jimm
      2/20/2014 Jimm
      You can ask to speak with and settle the cost of the previous misdiagnosis with the repair shop manager. Maybe they will agree to refund some or all of the cost - or agree to provide the required repairs for free or greatly reduced cost to you. If not, then you have only one remaining option.....

      You can elect to take your business elsewhere - to another shop that will properly diagnose the issue(s) you are having. For example, the Mass Airflow Sensor replacement will not correct any of the misfiring codes; P0300, P0303, P0305, etc.

      Here are the fault codes and causes in each case;

      P0300 (0303 / 0305) = Cylinder misfiring
      For the misfires

      It may mean that one or more of the following has happened:

      Faulty spark plug or wire
      Faulty coil (pack)
      Faulty oxygen sensor(s)
      Faulty fuel injector
      Burned exhaust valve
      Faulty catalytic converter(s)
      Running out of fuel
      Poor compression
      Defective computer

      Possible Solutions

      If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

      If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

      P0171 = System Too Lean (Bank 1)

      Basically this means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes.

      This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio of 14.7:1. If something is not right and the PCM cannot maintain the 14.7:1 ratio, but rather there is too much air, it triggers this code.

      A code P0171 may mean that one or more of the following has happened:
      •The MAF (Mass Air Flow) Sensor is dirty or faulty
      Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
      •There could be a vacuum leak downstream of the MAF sensor
      •Possible cracked vacuum or PCV line/connection
      •Faulty or stuck open PCV valve
      •Failed or faulty oxygen sensor (bank 1, sensor 1)
      •Sticking/plugged or failed fuel injector
      •Low fuel pressure (possible plugged/dirty fuel filter!)
      •Exhaust leak between engine and first oxygen sensor

      Possible Solutions:
      A lot of times, cleaning the MAF sensor and finding/fixing vacuum leaks fix the problem. If you're on a tight budget, start there, but that may not be the fix for certain. So, possible solutions include:
      •Clean the MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with MAF-specific cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
      •Inspect all vacuum and PCV hoses, replace/repair as required
      •Inspect all hoses and connections in the air intake system
      •Inspect and/or test the intake manifold gaskets for leakage
      •Check for a dirty fuel filter and proper fuel pressure
      •Ideally you'll want to monitor short and long term fuel trims using an advanced scan tool
      •If you have access, you may want to run a smoke test
      Jimm
      2/20/2014 AutoMD Member
      Thank you for your response. The car is having some symptoms: When I press the gas and even if I am just coasting the car seems to be stuttering. There is definitely a strong exhaust smell when I shut the car off, too, but it does not smell like rotten eggs. It seems likely that the problem could be one of the O2 sensors, but the mechanic said he checked them. I am hoping the mechanic will do the right thing and work out a deal for the next repair.
    • HouseCallAuto
      2/20/2014 HouseCallAuto
      The real cause is most likely a bad Air Fuel Ratio Sensor bank 1 sensor 1 and replacing the mass air flow sensor with 2 misfire codes present on one bank clearly would not solve the misfires.
  • AutoMD Member
    AutoMD Member - 2004 Toyota Corolla - Engine - 2/19/2014
    .5gal of water in empty radiator. Ok to add 50/50 pre diluted coolant in radiator reservoir?
    Please help. My car's radiator/engine temp gauge was hot so my mechanic put 1/2 gal of water in the Radiator . Before that, he said my overheating was due to lack of coolant. My temperature gauge maintained midway temp and he advised me to add coolant in the ...
     
    • HouseCallAuto
      2/19/2014 HouseCallAuto
      Do not add it to the reservoir, add directly to the radiator, slowly until the radiator is full. Then start the car and let it idle and when the coolant level begins to get lower in the radiator add more and keep doing that until it does not drop anymore and the coolant should be warm or hot to the touch with dipping your finger into the radiator neck. It can take 5 or 10 minutes of watching for the thermostat to open and the level to drop and all the air to get purged out but it will happen. At some point turn the heater on and confirm that the car is blowing out heated air. It is perfectly ok to run the engine with the radiator cap off for as long as it takes for the cooling system to stabilize and then put cap back on. Also, do you have an idea why the coola nt level was low or why it overheated? It usually means there is a leak someplace. If you just add coolant it will be ok until it leaks down low again and then will overheat again. And yes, the 50/50 will be ok.
  • AutoMD Member
    AutoMD Member - 2011 Toyota RAV4 - Engine - 2/19/2014
    How do I replace bank 1 sensor 2 without disassembling interior console?
    Wiring disappears into the frame.
     
    • Jimm
      2/19/2014 Jimm
      Is this a question regarding the bank 1 snsor 2 oxygen sensor (O2 sensor) located on the exhaust system? If yes, why would you be concerned with the interior console for the oxygen sensor replacement?

      Simply disconnect the old O2 sensor wiring connection at the sensor. Then, using an oxygen sensor deep socket - unscrew / remove the old sensor. Sometimes the old sensors can be corroded - so a spray of thread lubricant to the base of the old sensor (remove the old sensor when the vehicle / engine is cold) and given time to left soak in - will help the removal process.

      Be sure to place a light coating of anti-sieze / thread lubricant on the new sensor threads before the installation.

      You might reference the 'How-To-Guides' feature on the AutoMD website for the specific steps to changing the O2 sensor.

      The parts are readily available from these many on-line sources, www.partsgeek.com, www.rockauto.com, www.discountautoparts.com, www.autopartswarehouse.com, www.jcwhitney.com - to list only a few possibilities.
      In fact, they (RockAuto) list the oxygen sensors from around $44.00 for your vehicle.

    • HouseCallAuto
      2/19/2014 HouseCallAuto
      The connector I believe is anchored under the console / carpet and unless you remove the console you can't do it. Some vehicles I have run into I was able to pull on the wire and the connector simply went through the access hole after the rubber seal was pulled downward. Not sure if you already tried that but I would try this first. If you do have to remove the console, don't panic or let this stop you BUT do get a detailed manual with the step by step with the pics so that you do not break anything.
  • AutoMD Member
    AutoMD Member - 2007 Toyota Camry - Engine - 2/18/2014
    What damage could this do to my engine?
    I took my Toyota Camry (69000 milage on vehicle) for engine oil change. They did put any oil in it since there was no sign of oil on the dip stick. I have driven it for 15 mins total of 2 miles local + 8 miles freeway. I saw low engine pressure light flicker on and ...
     
    • HouseCallAuto
      2/18/2014 HouseCallAuto
      Someone else besides the place the did the oil change has to examine this. There could be damage that will not show up now or there could be damage now. Driving 15 minutes with no oil pressure? That can kill an angine quicker than 15 minutes. What matters most here is how many minutes the engine was actually running with you seeing the low oil pressure message. You can be low on oil but not empty and there is a huge difference between the two. No reading on dipstick does not mean totally empty but of course could be. The only thing that may be in your favor here is if it was underfilled (not empty) in which case no damage is likely.
  • soonersbigb82
    soonersbigb82 - 2003 Toyota Tundra - Engine - 2/16/2014
    Ok I replaced radiator and ever since my a/c and heater doesn't work. What could b my problem?
    Well where the radiator screws on the housing that the cap screwed on basically fell apart. So I replaced radiatior. Before I replaced it the a/c and heater worked great. But ever since neither the a/c or the heater works. At first I thought it was just the a/c ...
     
    • CVO
      2/16/2014 CVO
      1.Air pockets trapped in the cooling system can cause the engine to loss their supply of coolant efficiency to the heater core. Some cooling systems have air bleed valves built into the system to aid in the removal of air pockets. Advice: For many cooling systems, the method of removing air pockets is to start the engine and allow it to run with the radiator cap off or loose until all the air escapes from the neck of the radiator. For some systems this method is not sufficient, and the manufacturer has installed air bleed valves usually near or on the thermostat housing.
      2. Check the heater hoses run from the engine to the heater core. The return heater hose back to the engine must be hot in order to make the heater core works. In the event, if that hose doesn't get hot then the heater is clogged. Replace the heater core.
 
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