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2013 Hyundai Tucson Question: Tucson non responsive from stop, with gas depressed,then races and jerks forward

 

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DHOLB, Sunnyvale, CA, September 28, 2012, 20:26
 Rookie

No response sometimes from stop with gas totally depressed, then takes off at high engine speed. Very dangerous when trying to enter traffic, no engine error code present.

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    pushrod September 29, 2012, 04:00
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     Master

    WARRANTY!! Take it back to the dealer.

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    DHOLB, September 29, 2012, 21:11
     Rookie

    I agree, but the problem is that the problem is intermittent, and while the engine does not stop, there is no response with a lot of gas pedal, then it suddenly jumps at high RPM (depending on how much pedal was applied) and the car lurches unless you stand on the brakes. Does this from a full stop, and today when starting up small slopes. I am monitoring the car computer also with a Scan Gauge, and the gas mileage goes all over the place while keeping the speed constant. May be a related issue? Car only has 200 miles on it at this point.

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    pushrod, October 01, 2012, 07:25
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     Master

    Sounds like throttle position sensor(TPS) or throttle control system. But the dealer still needs to check this out
    for you ASAP!

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    DHOLB, October 02, 2012, 16:18
     Rookie

    Problem solved: Hyundai has changed the computer system software starting with the cars built in 2012 so that you can not apply the brakes and the throttle at the same time. With breaks applied, the computer is overridden and will not accept the throttle input. This is in response to the big flap over the car runaway that happened to Toyota awhile back (that "was not a computer problem"). Because of this software change, if you are on a hill you MUST release the brake before you can apply the throttle, meaning you are now in danger of backing up into someone on your bumper as you try to move forward. Funny thing though, there is nowhere in the manual that explains this, it took several calls by the Dealer to resolve it.

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    pushrod, October 02, 2012, 16:44
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     Master

    I HAD NO IDEA, THANK YOU FOR THE INFO, AND I AGREE WITH THE REST OF YOUR REPLY!! I ALSO THINK THE TOYOTA DEAL WAS TOTAL BS.
    I THINK IT WAS AFTERMARKET FLOOR MATS HITTING THE GAS PEDAL OR THE LIKE. BE CAREFUL WHEN STOPPED
    AT LIGHT SITTING ON A HILL!!! ("MAN") I GUESS IF YOU HAD TO YOU COULD USE T HE HAND BRAKE. WHAT A PAIN IN THE --- --- NECK.

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