Question about Hyundai Elantra

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When i step on the gas pedal it does not accelerate beyond the 50 mark for about 1 minute even though the pedal is pressed down completely. The brake pedal is at thesame time stiff that a slight touch

The car is an hyundai elantra 2008 model. with a reading of over 100,000 meters

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  • Expert
  • 115 Answers

IS YOUR HAND BRAKE ON?IF NO, YOU HAVE A BRAKE PROBLEM.

Posted on Mar 29, 2014

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75797 Answers

SOURCE: making a knocking noise

This is most likely either a piston noise or a connecting rod bearing knock

Posted on Oct 21, 2008

betz73
  • 298 Answers

SOURCE: my buddy has a 2000

Have you checked the MAF and/or TPS sensor?. I have had the same issue before on the same kind of car and it turned out to be the MAF sensor.

Posted on Nov 07, 2008

  • 78 Answers

SOURCE: excessive brake pedal travel and 'soft' brakes

the brakes have to be bleed you wrote that when you start the car the pedal goes to the floor that means the booster is working fine take it back and tell them you want the brakes bleed

Posted on Nov 15, 2008

  • 64 Answers

SOURCE: Fiat Uno Pacer - Brake Booster not assist braking

it could be that the master cylinder is bad or the brake booster is bad also check the vacum hose going to the brake booster if it has a hole in it it will lose pressure and make the engine lose rpms

Posted on Aug 23, 2009

rtpflh
  • 546 Answers

SOURCE: whirring noise every time the gas pedal is pressed

check the level of the power steering fluid,check belt tension & condition

Posted on Sep 23, 2009

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My Nissan Maxima 2009 wont accelerate even though I step the gas pedal to the floor? what should I do??


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A complete driving cycle should perform diagnostics on all systems. A complete driving cycle can be done in under fifteen minutes.
To perform an OBDII Driving cycle do the following:
  1. Cold Start. In order to be classified as a cold start the engine coolant temperature must be below 50°C (122°F) and within 6°C (11°F) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.
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  4. Hold Steady Speed. Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.
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  • 1 First you will need to purchase a blank Toyota transponder key. You can do this from the dealership, a locksmith, or an online source such as eBay. Once you have the key, take the blank key and the master key to a locksmith that he or she can duplicate the key. This will be much cheaper than the dealership.
  • 2 Now that you have the newly cut key and the master key, you can program the Toyota transponder key. Sit in the driver's side of the Toyota vehicle. Press and release the brake and gas pedal simultaneously.
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  • 5 Insert the newly cut transponder key into the ignition, but do not turn. Press the gas pedal once.
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    Car will not accelerate when gas pushed


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    I have 1999Chevy suburban with 6.5 turbo diesel motor.it idles up and down and when driving the gas pedal is real touchy Wat is the problem and were do i locate the problem


    Check the help links related to this problem.Click the link below to go through its troubleshooting procedure :-----Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html---------
    Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
    -------Complete loss of brake pedal then all gets normal? http://repairhelpcenter.blogspot.com/2012/01/complete-loss-of-brake-pedal-then-all.html
    ------Car dies when gas pedal is pressed? http://schematicsdiagram.blogspot.com/2011/12/car-dies-when-gas-pedal-is-pressed.html
    --------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?

    http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html

    ---------

    After replacing brake rotors and pads, brake pedal remains on floor? http://technoanswers.blogspot.in/2012/02/after-replacing-brake-rotors-and-pads.html

    ---------

    accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

    -------

    For rough idle issues and problem troubleshooting,go through the help links provided below :----- van idles rough?

    http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

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    will not idle when cold?

    http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

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    runs lean and idles rough?

    http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

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    Engine stumbles coming off idle when warm?

    http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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    http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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    ---------

    This will help.

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    For this types of problem,there are few help links.I suggest you to click the link below and go through the troubleshooting procedure :-----Car only starts when gas pedal is pressed? http://technoanswers.blogspot.com/2012/01/car-only-starts-when-gas-pedal-is.html-----------Car won't start without hitting the gas pedal? http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-without-hitting-gas.html
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    --------------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down? http://technoanswers.blogspot.in/2012/02/pushing-on-gas-pedal-but-car-slows-down.html
    -------------Idles rough and quits when gas pedal is pressed less? http://technoanswers.blogspot.in/2012/01/1999-ford-f-150-idles-rough-and-quits.html----------This will help.Thanks.

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    You have to do a drive cycle, the fuel tank has to be between 1/4 and 3/4 of a tank of fuel, can not be above or below this fuel level.
    To perform an OBDII Driving cycle do the following:

    1. Cold Start
    In order to be classified as a cold start the engine coolant temperature must be below 50ºC (122ºF) and within 6ºC (11ºF) of the ambient air temperature at startup. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.

    2. Idle
    The engine must be run for two and a half minutes with the air conditioner on maximum and rear defroster on. The more electrical load you can apply the better. This will test the O2 heater, Passive Air, Purge "No Flow", Misfire and if closed loop is achieved, Fuel Trim.

    3. Accelerate
    Turn off the air conditioner and all the other loads and apply half throttle until 88km/hr (55mph) is reached. During this time the Misfire, Fuel Trim, and Purge Flow diagnostics will be performed.

    4. Hold Steady Speed
    Hold a steady speed of 88km/hr (55mph) for 3 minutes. During this time the O2 response, air Intrusive, EGR, Purge, Misfire, and Fuel Trim diagnostics will be performed.

    5. Decelerate
    Let off the accelerator pedal. Do not shift, touch the brake or clutch. It is important to let the vehicle coast along gradually slowing down to 32km/hr (20 mph). During this time the EGR, Purge and Fuel Trim diagnostics will be performed.

    6. Accelerate
    Accelerate at 3/4 throttle until 88-96 km/hr (55-60mph). This will perform the same diagnostics as in step 3.

    7. Hold Steady Speed
    Hold a steady speed of 88km/hr (55mph) for five minutes. During this time, in addition to the diagnostics performed in step 4, the catalyst monitor diagnostics will be performed. If the catalyst is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst.

    8. Decelerate
    This will perform the same diagnostics as in step 5. Again, don't press the clutch or brakes or shift gears.

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    The vehicle has a optional adjustable brake to increase driver comfort. The brake pedal position is changed in phase with the accelerator pedal. The system is adjusted by pressing the dash-mounted switch that powers the driver motor mounted on the accelerator pedal assembly. The two-way motor operates backward (away from the driver) or forward (toward the driver) to adjust the accelerator pedal directly and the brake pedal through the drive cable attached to the brake pedal assembly.
    --------------------
    • Adjustable brake pedal inoperative
    • Switch.
    • Circuit.
    • Motor.
    • Cable.
    • Obstructions
    ------------------------------------
    PINPOINT TEST D: ADJUSTABLE BRAKE PEDAL INOPERATIVE Test Step Result / Action to Take D1 CHECK MOTOR SOUND
    • Allow two minutes for the thermal overload to reset.
    • Operate the adjustable pedal control switch.
    • Can the adjustable pedal motor be heard to operate?
    Yes
    GO to D2 .

    No
    GO to D7 . D2 CHECK MOTOR INSTALLATION
    • Check adjustable pedal motor for correct installation.
    • Is the motor installation OK?
    Yes
    GO to D3 .

    No
    CORRECT the motor installation. TEST the system for normal operation. D3 CHECK ADJUSTABLE ACCELERATOR PEDAL SYSTEM
    • Disconnect the brake pedal-to-accelerator pedal cable.
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    • Operate the adjustable pedal control switch.
    • Does the adjustable brake pedal operate now?
    Yes
    INSTALL a new adjustable brake pedal assembly. REFER to Section 206-06 . TEST the system for normal operation.

    No
    GO to D4 . D4 INSPECT FOR FOREIGN MATERIAL
    • Inspect the adjustable accelerator pedal assembly for foreign material causing a binding condition.
    • Was any foreign material found?
    Yes
    REMOVE the foreign material. RETEST for normal operation.

    No
    GO to D5 . D5 CHECK CABLE
    • Detach the adjustable pedal motor cable.
    • Inspect the ends of the brake pedal motor cable for wear or damage.
    • Are the cable ends OK?
    Yes
    GO to D6 .

    No
    INSTALL a new accelerator pedal assembly. REFER to Section 310-02 . TEST the system for normal operation. D6 CHECK CIRCUITS FOR SHORT TO BATTERY
    • Key in OFF position. Adjustable Pedal Switch C290
    • Disconnect the adjustable pedal switch C290.
    • Measure voltage at C290-1 and C290-7.
    • Is the voltage greater than 0 V at either pin?
    Yes
    REPAIR the short to battery. TEST the system for normal operation.

    No
    GO to D7 . D7 CHECK POWER TO SWITCH
    • Measure the voltage at C290-2 circuit 490 (RD).
    • Is the voltage greater than 10 V?
    Yes
    GO to D8 .

    No
    REPAIR circuit 490 (RD). TEST the system for normal operation. D8 CHECK GROUND TO SWITCH
    • Measure resistance to ground at C290-3 circuit 57 (BK) and C290-6 circuit 57 (BK).
    • Is the resistance less than 5 ohms at both pins?
    Yes
    GO to D9 .

    No
    REPAIR the open circuit. TEST the system for normal operation. D9 TEST SWITCH
    • Connect fused jumpers between C290-1 and -2 and between C270-7 and -3.
    • Does the adjustable pedal motor run in both directions?
    Yes
    INSTALL a new adjustable pedal switch. TEST the system for normal operation.

    No
    GO to D10 . D10 CHECK SWITCH-TO-MOTOR CIRCUITS CONTINUITY
    • Connect: Adjustable Pedal Switch C290.
    • Disconnect: Adjustable Pedal Motor C2001.
    • Measure resistance to ground at both pins of the adjustable pedal motor connector, circuits 1494 (RD) and 1495 (WH).
    • Is the resistance less than 5 ohms at both pins?

    Apr 24, 2009 | 2003 Mercury Grand Marquis

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