Auto Answers » Engine » Toyota » Page 221

Toyota engine repair questions and answers

Post your Toyota engine question or share what you know by answering questions

3890 Questions
Sort by:
  • regie
    regie - 1997 Toyota Camry - Engine - 10/18/2010
    Missing misfire on cyl. 1234
    codes p0300,p0301,p0302,p0303,p0304,p0401,p0402, p0420 comes on . dont know where even to begin need help
     
    • yboy82
      10/18/2010 yboy82
      P0300 means random/multiple cylinder misfire detected. The possible causes of this trouble code are defective spark plugs and plug wires, defective oxygen sensor, defective coil, defective camshaft position sensor, burned exhaust valve, stuck/clogged EGR valve / passages, defective fuel injector and faulty catalytic converter.

      P0301 means cylinder # 1 misfire detected. The possible cause of this trouble code are defective spark plugs and plug wires, defective oxygen sensor, defective coil, defective camshaft position sensor, burned exhaust valve, poor compression, running out of fuel, defective fuel injector and faulty catalytic converter.

      P0302 means cylinder #2 misfire detected. The possible cause of this trouble code are defective spark plugs and plug wires, defective oxygen sensor, defective coil, defective camshaft position sensor, burned exhaust valve, poor compression, running out of fuel, defective fuel injector and faulty catalytic converter.
      yboy82
      10/22/2010 regie
      on the oxygen sensor which 1 do i change before or after the converter? notice problem occur when the engine is getting warm. then it goes away and comes back
    • yboy82
      10/18/2010 yboy82
      P0303 means cylinder #3 misfire detected. The possible cause of this trouble code are defective spark plugs and plug wires, defective oxygen sensor, defective coil, defective camshaft position sensor, burned exhaust valve, poor compression, running out of fuel, defective fuel injector and faulty catalytic converter.

      P0304 means cylinder #4 misfire detected. The possible cause of this trouble code are defective spark plugs and plug wires, defective oxygen sensor, defective coil, defective camshaft position sensor, burned exhaust valve, poor compression, running out of fuel, defective fuel injector and faulty catalytic converter.

      P0401 means insufficient EGR flow. The possible causes of this trouble code are defective DPFE (differential pressure feedback EGR), clogged EGR passages, defective EGR valve, and lack of vacuum that’s why the EGR isn’t opening.
    • yboy82
      10/18/2010 yboy82
      P0402 means exhaust gas recirculation flow (EGR) excessive detected. The possible causes of this trouble code are defective DPFE (differential pressure feedback EGR), clogged EGR passages (more likely a carbon build up), defective EGR valve, and lack of vacuum that’s why the EGR isn’t opening.

      P0420 means catalyst system efficiency below threshold (bank 1). The possible causes of this trouble code are retarded spark timing, not working properly/faulty ECT (engine coolant temperature) sensor, damaged/leaking exhaust manifold/catalytic converter/exhaust pipe, and faulty oxygen sensor
  • actionjsback
    actionjsback - 1994 Toyota Supra - Engine - 10/17/2010
    My supra battery has been dead for a while, when I jump it off the engine will run, but the mechanical warning lights
    stay on. And, the engine cooling fan does turn on, nor the a/c and the power steering wheel is very hard to turn...What's Wrong??
     
    • Craig
      10/17/2010 Craig
      Is the belt loose or missing?
  • Michael
    Michael - 1987 Toyota Supra - Engine - 10/17/2010
    Car runs roughly after starting when warm. Runs fine until turning it off. Starts and runs well when cold
    After the rough start it takes a few minutes to run smoothly , after it starts running smooth, it runs well
     
    • Craig
      10/17/2010 Craig
      check for accurate temp. sensor reading.
  • John Burke
    John Burke - 1997 Toyota Supra - Engine - 10/17/2010
    Why am I losing boost when second turbo comes on?
    I am having a problem when my second turbo starts it wont build up boost. It runs ok just no power from boost.
     
    • Craig
      10/17/2010 Craig
      Check for boost leak after the turbo, before the intake.
  • Kevin White
    Kevin White - 1997 Toyota Camry - Engine - 10/17/2010
    Code 0401 replaced egr valve egr modulator valve check engine light back on
     
    • HouseCallAuto
      10/17/2010 HouseCallAuto
      Replace the Exhaust Gas Recirculation (EGR) Vacuum Solenoid Valve (VSV). This is different than the modulator that you replaced.

      The EGR VSV is located on the bottom of the intake manifold.
      HouseCallAuto
      10/17/2010 Kevin White
      vsv is it vacuum switching valve or vacuum solenoid valve
  • slickrick
    slickrick - 1991 Toyota Pickup - Engine - 10/17/2010
    What would cause the automobile to shut off while driving
     
    • backyardfixer
      10/17/2010 backyardfixer
      could be many things need more info sounds lights is there smoke does it happen when accelerating or at idell this info is important for a proper answer
  • mike
    mike - 1995 Toyota Camry - Engine - 10/17/2010
    My 95 camry le just got a new head gasket runs great butt the engine idle is smooth in nutral
    when i shift into drive with brake on idle seems not smooth iwant smooth idle
     
  • SAL
    SAL - 1996 Toyota Camry - Engine - 10/16/2010
    At engine starts, engine shuts down. Restart and hold RPMs at 1000 for 3 minutes and engine will run at 700 RPM normally
    What could be causing the problem? 89000 miles. Happens the first start of the day. I noticed this problem about a few weeks ago and added fuel injector cleaner to gas-no help. No engine check light is on at engine start.
     
    • HouseCallAuto
      10/16/2010 HouseCallAuto
      It either has a bad Coolant Temperature Sensor or a bad Idle Air Control (IAC) Valve. I would say the valve.
  • jimmy molter
    jimmy molter - 2001 Toyota Sienna - Engine - 10/16/2010
    While the engine was running i disconnected the battery so i could start another car
    positive cable has been cut and refastened
     
    • Oxides
      10/16/2010 Oxides
      ...and you killed the alternator or sent a voltage spike to a control module and fried a bunch of stuff?
  • Christine
    Christine - 1995 Toyota Avalon - Engine - 10/16/2010
    How can you tell when the EGR valve/sensor is gone bad?
     
    • HKS Guy
      10/15/2010 HKS Guy
      The EGR is supposed to be closed at idle, but if it is stuck partly open then idle quality will be poor: slow and rough (uneven) and you may have poor gas mileage.
    • yboy82
      10/15/2010 yboy82
      Diagnose your vehicle with a scan tool to determine if there is a stored trouble code in your vehicle that can help you identify the fault to your vehicle’s problem (if the fault in your vehicle’s problem is one of your electrical control or sensor it will show in your trouble code) instead of guessing. Even if your check engine light is off don’t assume that there’s no stored trouble code in your vehicle, to be certain that there’s no stored trouble code in your vehicle you have to diagnose it with a scan tool. You can visit AutoZone or nearby auto parts store for free diagnostic.

      You can also visit this link to have an idea how to diagnose your vehicle using a scan tool http://www.automd.com/.../
    • backyardfixer
      10/16/2010 backyardfixer
      in my past experiance the car will smell of rotten eggs same problom with a 98 neon
  • rdaugh
    rdaugh - 1993 Toyota Camry - Engine - 10/16/2010
    Cranks but will not start
    engine quit while driving
     
    • MOONSTER_TOOLZ
      10/15/2010 MOONSTER_TOOLZ
      Did you check the condition of your spark plugs; it may be worn to excess? A contaminated fuel system may cause your engine dies when driving; check, clean or replace part (fuel filter). Check also your fuel pump relay may be loose or defective.
    • backyardfixer
      10/16/2010 backyardfixer
      DOES IT HAVE SPARK check cap rotor if possable, ignition coil need more info
  • joanne
    joanne - 1994 Toyota Camry - Engine - 10/15/2010
    Hesitation when the car is warm
    1994 toyota camry 126,000 just purchased in July 2010. When I 1st start the car it runs great. After it warms up it starts to hesitate. When I press down on the gas it hesitates. If I can get it to shift in the next gear it runs fine for awhile the hesitates. If ...
     
    • yboy82
      10/15/2010 yboy82
      Diagnose your vehicle with a scan tool to determine if there is a stored trouble code in your vehicle that can help you identify the fault to your vehicle’s problem (if the fault in your vehicle’s problem is one of your electrical control or sensor it will show in your trouble code)? Even if your check engine light is off don’t assume that there’s no stored trouble code in your vehicle, to be certain that there’s no stored trouble code in your vehicle you have to diagnose it with a scan tool. You can visit AutoZone or nearby auto parts store for free diagnostic.
  • trish
    trish - 1999 Toyota Camry - Engine - 10/15/2010
    My car hesitates when I turn key. Does that mean I need a new battery?
     
    • RC
      10/15/2010 RC
      If the engine does not turn over normally, a weak battery is the most probable cause. How old is the battery?
      RC
      10/15/2010 trish
      Thank you RC. Battery is a couple of years old.

      Note - My car sits on the street all week long ( I walk to the rain station) and most of the time only use my car one day out of the weekend. So I guess it is just sitting there rotting away , ay?
  • Steve
    Steve - 1990 Toyota 4Runner - Engine - 10/15/2010
    What is the recommended spark plug gap specification for this vehicle?
     
  • Tom
     
    • Bobby
      10/15/2010 Bobby
      Your truck most likely has a timming belt, and while you all ways have the chioice of changing or not changing parts for instance Radiator hoses are recommened to be changed at certain mileage but most people never do unless they bust a hole. The timing belt should be replaced at the manufacturers recommended mileage for replacement. Again you don't have too you can wait sometimes they never let go, sometimes they do. But the thing with a timing belt is depending on the motor if the belt snaps it can cause damage to the engine. how many miles on the engine now? nad when does the maintenece schedule say is the time to replace the belt?