Hyundai 2012 problem [Relocated thread]

Reply

  #1  
Old 01-13-14, 01:18 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
Hyundai 2012 problem [Relocated thread]

This car of mine revs the engine by itself. When travelling on the road, the car goes faster and faster even when the pedal is not depressed. The brake will stop the car, and upon releasing the brake it speeds up again. I took off the ignition key several times and after starting on park, the engine revs up to the max of the tachometer. I checkd the fuel cap and actuated the gas pedal for several times. It may be a stuck gas pedal linkage but the technicians say no about this. This has happened to me 4 times, summer or winter. The problem goes off as fast as it comes up. But I see the danger in somebody else driving this car.
 
Sponsored Links
  #2  
Old 01-13-14, 01:21 PM
Join Date: Jun 2010
Location: Canada (near The Motor City)
Posts: 616
Is your car not under warranty?
 
  #3  
Old 01-13-14, 02:03 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
Hyundai Problems

It is, but I am still not satisfied with what they think the problem is. The car is working without the problem when I brought it in.
 
  #4  
Old 01-13-14, 10:40 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 46,053
It won't have anything to do with the gas cap.
Is the petal getting stuck down or not ?

The dealer had better take care of it or one of two things will happen:
1) You'll blow the engine up.
2) you'll end up hitting someone/something.
 
  #5  
Old 01-14-14, 07:13 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 18,112
Keep contacting your dealer. Get your continuing problem documented and in their system. Also ask the dealers service manager to escalate this problem to Hyundai corporate. They often are aware of and may know solutions for obscure issues that the dealer may have never seen before.
 
  #6  
Old 01-14-14, 11:58 AM
ukrbyk's Avatar
Member
Join Date: Mar 2010
Location: USA/ Pacific NW
Posts: 3,313
I almost guarantee you that for 2012 you have drive by wire system and pintle valve in throttle body is operated by computer. So, either that motor for throttle plate is acting up, or gas pedal position sensor is acting up or ECM is acting up.
 
  #7  
Old 01-14-14, 08:52 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
The third time it happened, I called on the road and ask them to record this problem, thinking that this model may be due to a recall because of this. I did tell the serviceman on the desk that the problem has gone away and that it may be risky to drive away in this car. He just started the car and since it worked OK, he just said they will make tests. I took it out again after finding out that nothing is to be done on it yet after 4 hours of waiting. Of course there was no service appointmant made for that day. This was an emergency problem.
 

Last edited by capmorgan; 01-14-14 at 08:58 PM. Reason: typographical errors
  #8  
Old 01-14-14, 08:56 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
Question

Hyundai may have been aware of this problem before. But this goes to show that the Hyundai dealer here does not have any tech who is factory trained.
 
  #9  
Old 01-14-14, 09:19 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
It is good thet you mentioned the computer on board. I did suggest to the servece writer that it may be the computer or the stuck gas pedal linkage. The Service Operations Manager rejected the computer cause, stating that there is no error light on and that there may not be an error code recrded. To which I replied that if there were no error codes reported, then the computer is really effed up. It will not generate an error code if the driver is the one in error and that the problem is caused by human actions. The error code will be generated if the engine itslf does the mistake. Now, several actuations of the gas pedal when the engine is turned off assured me that the pedal is not stuck. Still, the motor revs up on park and after start. It is therefore an idling problem, The computer should sense that the speed has increased with nothing to apply torque for and the battery is fully charged. The tach needle should drop to 750 or such unless there is demand for fuel.
 
  #10  
Old 01-14-14, 10:43 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
By the way, notice that your gas caps, or the newer models of cars, are sort of spring loaded?
This is one way of regulating the vacuum being drawn by the fuel pump. Without this cap, your fuel tank may be subjected to atmospheric pressure thereby adding or supplementing the pressure produced by the fuel pump. In some way, the fuel cap does limit the amount of air coming through and ensures that the pressure produced is only that coming from your fuel pump. Also, the space vacated by the fuel will now be filled with air which in turn mixes with your fuel and thus more moisture is sucked in. The gas cap is also vented.
 
  #11  
Old 01-15-14, 07:23 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 18,112
If the ECM did not record a fault it sounds more like the sensor at the gas pedal. If it sends a signal for full throttle the ECM and everything else downstream will just think you are standing on the pedal. Hyundai has been using throttle by wire for years so you'd think their mechanics would be keen on switch failures or at least to throw parts at it when in doubt, especially for a safety issue.
 
  #12  
Old 01-16-14, 04:17 AM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
This is very possible if the problem does not go away. But the problem does go away. It may also be that the sensor is covered with dust or grime or water that has solidified. Dust and grime is present during summer, and solidified water is present during winter. The problem, however occurs summer or winter. Sand in water puddles, however, may be present during summer and winter. Sand may cloig any sleeve on a plunger, preventing restoring of the gas pedal. However, if the pedal fails to restore at some point, the tachometer needle will also stop at some point, and not run away to the maximum.Also, I am unable to see the gas pedal linkages from where I stand. And I refrain from toucjhing anything under warranty. The serviceman should know exactly what the problem is. This time the problem may have overwhelmed the serviceman. I am now inclined to have the car looked at by somebody else. I am also beginning to regret my taking out the six-year warranty for this car.
 

Last edited by capmorgan; 01-16-14 at 04:28 AM. Reason: add more
  #13  
Old 01-16-14, 06:46 AM
Join Date: Jun 2010
Location: Canada (near The Motor City)
Posts: 616
There is no gas pedal linkage, it is computer controlled.

Read these links https://www.google.ca/#q=unintended+...ration+hyundai
 
  #14  
Old 01-26-14, 12:23 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
So if there is no linkage, it would be a computer problem. The computer must sense the distance that the pedal travels, the speed of the engine, and the velocity of the car. BTW, I don't have 2 granddaughters, only two grandmothers.
 
  #15  
Old 01-26-14, 12:34 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
I am inclined to agree with PILOT, in that these mechanics may be keen to fix failures but not keen enough to picture other possibilities of failure. This time I tried to reset the computer error by taking off the key from the ignition. It takes me several times to do this, getting the risk of disccharging the battery on the process. Also, I believe that Mazda had a DIY procedure to reset the errors on the on-board computer without using that hamd-held thingamajig. But again, there has been no error registered.
 

Last edited by capmorgan; 01-26-14 at 12:34 PM. Reason: typo error
  #16  
Old 01-26-14, 12:45 PM
Join Date: Jun 2010
Location: Canada (near The Motor City)
Posts: 616
If this is a warranty issue I wouldn't be screwing around trying to fix it myself, especially when I didn't fully understand the problem.
You may "fix" yourself right into a voided warranty .....
 
  #17  
Old 01-26-14, 01:10 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 46,053
There is what amounts to a volume control on the gas pedal. As you press the pedal down the voltage that is sent to the computer increases. The computer uses that voltage so it knows what voltage to send on to the electronic throttle system.

I severely doubt it's a computer problem.


This is from the link in post 15.
"With Hyundai's brake pedal throttle override capability, any brake pedal input by the driver, even with a runaway throttle condition, completely overrides any throttle malfunction," said Robert Babcock, director of certification and compliance affairs for Hyundai's technical center. "It is no longer possible to have increasing engine power once the brake pedal is depressed by the driver. This adds a reassuring, incremental safeguard of control for Hyundai drivers."
This is actually not 100% true. The brake pedal override will override the gas pedal sensor, it should be able to override the computer, but it can't override a stuck throttle motor.

This override system will only stop the issues where people step on their gas pedals and brakes by mistake.
 
  #18  
Old 01-26-14, 07:36 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
You may not have been listening. I said that I was not touching anything so that the warranty will not be voided. Besides, the serviceman should see for himslf exactly where the problem is coming from. Taking the key off the ignition is not exacrly touching anything, right?
 
  #19  
Old 01-26-14, 07:50 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
Funny that he wrote this. I did mentionthat the engine speed decreases abruptly when I step on the brake pedal. But then again he never mentioned that the speed increases again once the brake pedal is released. This is still not reassuring. Remember that I mentioned that I control the speed of the car by putting on the brakes. The minute I release the brake pedal after I put the car on park, the engine again runs away. If,as PJMAX wrote, that there is a throttle motor that can get stuck, how then can this motor be unstuck?
It has always been the design for any motor vehicle that the removal of the ignition key halts all electrical processes, except maybe the cooling fan motor and the remote control sensor.
But I am still wondering if any of the Hyundai people who are technically knowledgeable about their cars would be gracious enough to join this discussion. This forum benefits everybody, even lowly ol' me who knows cars only from the viewpoint of a driver, not a serviceman nor any technical man. The posts that I have wrote so far are coming from logic, and my experience as a driver, not as an auto designer nor a car mechanic. If they should consider this as a dare, so be it. Let our concern be directed to the less knowledgeable driving public.
 

Last edited by capmorgan; 01-26-14 at 08:28 PM. Reason: addenda
  #20  
Old 01-29-14, 08:52 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
I guess the knowledgeable people from Hyundai are not able to join our conversation here. I presume that they are waiting for us to solve this problem ourselves so that they can add to their service manuals the solution that we found and then call it their own discovery. Ah well, maybe we can do better. Now, if you are the serviceman who is assigned to fix this car, and you already have this car on the lift, can you tell us what tests you would have taken to find the solution?
 
  #21  
Old 01-29-14, 09:06 PM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
I have new developments to add to this problem. It has happend to me again but in a different way. it is as if it does not act as a spoiled brat anymore but it has tantrums now. The engine is not on runaways now but it acts as if it was using premium gas( 0% etahnol) when it had in its fuel tank only the regular unleaded gas (10% ethanol). It now threatens to go like a jackrabbit when the light turns green and I really have to hold it back at times. The car has become more responsive and quick. I like it better this way but it never did this before. I am now compelled to study further the fuel system in this car. Be back after a longer whiile... The idling speed is now down pat to the correct 750 rpm on startup. Sheesh!
 
  #22  
Old 01-31-14, 12:06 PM
Member
Join Date: Jul 2013
Posts: 58
if the dealer you are using can't replicate the problem, i'd find another dealer. has the first dealer kept the car for a few days to do any diagnostics?
 
  #23  
Old 02-04-14, 11:29 AM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
No diagnostics made. i took it out again after they seem to be confused about the problem. I imagine thay will have to keep my car for long and I cannot afford to miss using this car indefinitely. Worse, the dealer service writer even erased any record of my bringing it in for repairs. They also say that they do not have any loaner. Another dealer is very much in consideration, thanks.
 
  #24  
Old 02-04-14, 12:05 PM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 21,023
Time for you to move past the dealer and get the regional rep involved. It's in the back of your owners manual or available online.

I do have to ask..has anyone else driven the car and experienced the same issue? Friend, family?
 
  #25  
Old 02-04-14, 04:32 PM
CasualJoe's Avatar
Member
Join Date: Jan 2010
Location: USA
Posts: 9,379
Worse, the dealer service writer even erased any record of my bringing it in for repairs.
In my opinion, that's a worse offense by the dealer than simply not knowing what to do. I'd take Gunguy's advice and contact the regional guy or even higher up and express my dissatisfaction. If you don't get an immediate response from someone, I'd file a Federal Vehicle Safety Complaint.

https://www-odi.nhtsa.dot.gov/Vehicl...nt/index.xhtml
 
  #26  
Old 02-04-14, 05:39 PM
Member
Join Date: Jul 2013
Posts: 58
when i owned a hyundai, they didn't offer a free loaner but at least had an option to rent a vehicle for maybe 20 bucks a day. if you can't be without a ride, do they not even entertain that possibility for you?

based on the level of service they're giving, i wouldn't even bother with them at this point. definitely get regional management involved, and file a complaint.
 
  #27  
Old 02-18-14, 09:36 AM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
This would be true if you did not expect a loaner and that they are not obliged to provide you with one. But i took out and paid for a Go-Auto membership. I should be provided with a loaner all throughout the service.
Filing a complaint would be the first action to do, but I did file a complaint before regarding my over-payment of the six-year warranty. I was told by the President of Hyundai from out West that somebody will contact me. Of course, nobody did.
Let this be a lesson for ust to select the best warranty available and from which dealer.
Yesterday this happened to me again, this time I took notes as to the settings ion the car, the maximum speed it reached, and the procedures that I took.
This topic, however, is not anymore covered by this blog, a Do It Yourself blog. So I will transfer this topic to my own website within 24 hours, OK?
Don't do it yourself if the equipment is still under warranty.
 
  #28  
Old 02-18-14, 09:46 AM
Member
Thread Starter
Join Date: Jan 2014
Location: Canada
Posts: 16
Yes, Gunguy45, my wife informed me sbout this too, the first time around, and she kept on riding the brakes until she reached home. That was during summer. Id did not happen to me then.

Check out this website : SHRAPNEL OFF THE WALL

Bloig title : Shrapnel Off The Wall
 

Last edited by capmorgan; 02-18-14 at 10:26 AM. Reason: addendum : url
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes