Question about 2001 Hyundai Accent

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Reving High and Won't Start

I have two different problems with my car. I've brought my car to the gargage for both problems.
1) My car at least once a week will not start. The started has been replaced, the ignition wiring has been changed. It's a standard. It started last summer(June 2008). It acted up all summer and then winter came (As I Live in Canada) and the problem just stopped. Then the end of March comes (warmer weather and rain) and again at least once a week sometimes every two weeks, it will pick a day that it won't start. Most of the time, it's in the morning or when left a few hours but it will start after a few hours.
2) My car will reve high while in First and neutral. Sometime will will reve up to 3 RPM's while sitting at a light.

My car now has both problems. Last summer I fixed the Throttle position Sensor and we've checked to see if it's faulty and it's not.

Any body have any ideas??

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  • samcauley May 13, 2009

    It won't start periodically. But when it does start and I'm driving, something is triggering it reve while in first gear or in neutral.

  • Paul McGrath
    Paul McGrath May 11, 2010

    Too many possible CAUSES!.. You need a PROFESSIONAL technician to diagnose this/these issues. You describe a multitude of potential causes (TPS for one.. ECU for another, Idle Speed Actuator, MAP sensor, MAF sensor IAT sensor, ECT Sensor, ACC sensor... the entire MFI control system for that matter). Any Check Engine light? If so, any DTC's (Diagnostic Trouble Codes)?

  • yadayada
    yadayada May 11, 2010

    I don't understand how it could be revving high if it won't start??

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I have an idea... why don't you have a 'qualified Hyundai Technician' diagnose the problem?.. First of all, you describe an Engine Management System problem. I assume it a 1.6 DOHC engine. There are numerous suspect causes for your problem. Example, Idle speed actuator, Cam Position Sensor, Throttle Position Sensor, Injectors, Crank Position Sensor, Manifold Absolute Pressure Sensor, Engine Coolant Temp Sensor, Heated Oxygen Sensors, Mass Airflow Sensor (this one's my favorite.. along with Throttle position sensor), Intake Air Temperature Sensor, and the list goes ON... vacuum leaks, throttle body problems, PCV problems, Oh!.. and let's not forget plugs, wires, coils, fuel pump problems, etc. The one most often found as cause for excessive rev is the ECU (Engine Control Unit). Try this out... disconnect the battery. Take the the pos (+) cable and connect/touch it to the neg (-) cable for 60 seconds.. then reconnect the cables to the battery. Tell me what happens after you drive it for awhile. If it's still acting up... take it in for diagnosis.

Posted on May 31, 2009

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I have a 2001 Elentra and the revving up too high issue was a huge one for me. I changed the throttle position tensioner and that was not it. Come to find out it was my cruise control that was going out and it was getting stuck. Disassemble the cruise control and let me know how it runs. I am a girl, but I know more about cars than my hubby does. lol. Just let me know something.

Posted on Jun 01, 2009

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