2013 Elantra with 99,250 miles on it 750 miles to go on the warranty. From 88,000 miles and forward the car at 35-40 mph will misbehave on occasion. RPMs will race (go vrrrroommm), the car loses acceleration does a little forward jump will catch and drive normally. The car has been in the shop 4 times. At 99,000 miles 3 weeks ago the bad behavior was starting to happen at around 30 mph with a much harder forward sensation. The car finally coded with a P0304 4th piston misfire. Tune up done and fuel induction service at the cost of $435. Now 2 weeks and 200 miles later the car at 40 mph while my teenage daughter was driving froze at 40mph. The accelerator and brake did not respond. It was a momentary glitch and then drive normally. The previous problem still exists too but it’s not as harsh of the jump forward. Driving the stupid car to the shop this last time when the car downshifted around 40 mph there is a hard shift and forward motion when it catches. Dealership said pick up your car it’s not coding we can’t fix it! Please help! I can not let my 16 yr old drive this road hazard.
To the untrained eye there looked to be black on 2 of the spark plugs and 2 were clean.
We are thinking it’s transmission sensors or throttle body…
Oh and the stupid car won’t replicate for the 4 miles’s they drive it down the road
If it’s under warranty and the dealer hasn’t fixed it, contact Hyundai. See your owners manual for details.
Keep every document, as @shanonia says work your way up the ladder @ Hyundai. The zone office should be able to help you
Because the car is still under warranty, you need to place a phone call to Hyundai at the corporate level. Contact info can be found in your Owner’s Manual.
The corporate folks might be able to convince the dealership to… try harder… or they might refer you to a different dealership, but the bottom line is that they owe it to the owner of a warrantied vehicle to get this problem resolved.
You might want to request an appointment with their regional service supervisor, at the selected dealership. When I did this for a friend with a problematic Toyota, the regional supervisor and a Japanese engineer were able to repair a problem that had eluded the dealership’s mechanics on the previous 3 visits.
Good luck!
I have contacted Hyundai I have a case file and have emailed them about 5 times already
Also the only code the car has thrown at 99,000 and the 4th pistin misfire
Email may not carry the same weight as a registered letter. What does your owners manual say about how to contact Hyundai?
I will try to find that owners manual!
The dealership keeps telling me if it doesn’t code or replicate they can’t fix it. I called another dealership and they repeated the same thing. Also spoke with an attorney and also said they can’t go off what the customer says it has to do it for them.
Intermittent car problems are tough. Do you have another means of transportation? Perhaps the misbehaving vehicle could be left at the dealership long enough for their best technician to drive it home and back for a day or two or until it throws a tantrum. Sometimes an onboard diagnostic tool can be plugged in so that the technician can receive live data that helps zero-in on the problem(s).
I wonder if you could contact a dealer owner/principal and discuss the situation. Possibly they would let you drive a demo/loaner while your car was there. And of course you’re considering buying a brand new Hyundai, right? (wink, wink).
CSA
What’s the repair and maintenance history of this Hyundai? Is this owner the first owner? Not knowing where the owners manual is, how does the owner know what maintenance the car has needed up until now? Without documentation that the car has been maintained up to Hyundai standards, the carmaker may feel or have little obligation to the owner, especially if this is not the first owner.
The first symptoms mentioned sounded like transmission troubles. If they recur, there may or may not be a stored code, but I would take it to a good local non-chain transmission shop and ask their diagnosis. In the mean time, keep all your documentation.
If this owner was not the original owner the car would only have the 5 year 60000 mile warranty.
Actually, we bought the car at 5 thousand miles and the car IS a CPO and covered until 100,000 for the power train. The CPO is another issue, the company never completed the correct paperwork but I have paperwork stating it is a CPO with the car vin# and on the carfax
People actually look at that book? Wow! I can’t say I have ever opened one except to look for a code. The book was removed from the car when I took all my items out a few weeks ago when we had the car detailed to give to my daughter. So it’s somewhere close by. The car has had all recommended services pretty much on time. And we never refused anything they suggested.
Bought the car as a CPO at 5000 miles and the power train is covered until 100,000 miles
CPO, certified pre owned, only means they have certified it as previously owned. It means nothing and offers no benefit. The real benefit you have is the warranty, that is an enforceable contract.
IFF the warranty applies beyond the first owner.
I have asked the service department several times over, and was told yes the vehicle is covered to 100,000 power train if you can prove it’s a CPO. I can prove it. Plus there is documentation on Hyundai stating CPOs are covered 10 years or 100,000 pwertrain .
But warranty covered or not I need to know why the car is glitching especially the car not responding at 40 mph to brake or accelerator…that is an accident waiting to happen
Goods ideas above about making sure Hyundai Corp is aware of the situation. When I read the symptoms I thought of the throttle position sensor, so checking that out is probably worth the bother. It also sounds like there may be transmission involvement, so doing a proper transmission service probably makes sense too.
Intermittent are often difficult for shops to solve. One idea, ask the shop to let one of their techs drive the car as their daily driver. Eventually it will happen, and the tech will likely be able to figure it out b/c it is happening right then. The downside is you won’t have use of the car, but it sounds like it is of no use anyway in its present condition.
Thank you. I talked with a tranmission shop yesterday and he said it could very well be the power train and not the transmission because I called him asked about replacing the transmission sensors. However since the car is under warranty, he did not want to work on the vehicle and us pay out of pocket, but he was willing to try and diagnosis it. However, my husband decided to bring it to another dealer. I am having the vehicle towed from 1shop to another 45 miles away by AAA 
I spoke with this shop manager on Wednesday and he told me he would drive it till something happens because he understands I don’t want my teenager or myself behind the wheel.
Good going. Sounds like you have found someone responsible and empathetic. Best of luck to you. Please let us know how you fare.
I agree about going higher up the ladder and will work on that.
The last tranmission service was done at 77,000 miles at 88,000 was when I started having problems.
And I did tell them to drive it until they figured out the problem. They put 15 miles on the car the first 2 days and yesterday they put another 35 miles on, but I don’t know if they were just driving or driving at the 30-40 mph speed. It’s hard to drive it on the city roads (we live more in the country on slower constant roads)
I received a phone call from the department manager stating i had to pick up the car they couldn’t figure it out and didn’t have time to keep driving it. I asked if they would put their teenager in the car and all I received was I understand, so my guess is no they wouldn’t.
Transferring the car tomorrow to a different dealer that says they will drive till it dies! And yes, this is our 3rd vehicle (my teenager just inherited it last month) so she’ll have to do without
Ummmm CSA, our business is lost to them forever! (This is our 3rd Hyundai) And no they don’t give loaners out you have to pay for them, well actually when my traction control locked up on me at 56,000 miles they gave me a loaner while the car was in the shop for 2 weeks! Maybe because I went in there white as a ghost screaming that they better fix the stupid car. It locked up at 50 mph and sent me towards a guardrail, it had been in there twice previously for the traction sensor blinking but notbcoding. I was just told today the yaw rate sensor was on recall, however they told me at the time that it was because I had a baseball under the seat. BTW… I am loving my new Rav4
And just to add my first 2006 Elantra at 82,000 miles couldn’t be fixed by them, it literally was jumping down the street, they had it for 2 weeks and said here are the keys we can’t fix it! Traded it in and bought the 2013, my mistake