The contact owns a 2018 Kia Forte. The contact stated that while the vehicle was running, the check engine warning light illuminated. There was an abnormally loud roaring sound detected while accelerating. While depressing the accelerator pedal, the vehicle was slow to respond while shifting or reversing. The contact stated that the vehicle failed to shift to second gear. The vehicle was taken to an independent mechanic, who determined that the failure was due to the electrical solenoid, P337, shift valve, and transmission. The contact called the local dealer, where an appointment was scheduled; however, the vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 143,000.

- Lanham, MD, USA

I took a rd trip and downloaded root just to track my adventures and maybe side with quote offered. I've been tracking miles since I got the car! listening to its functions. There's something off for sure. The hr ride there with speed performance was ok. The night rd back on hwy was the ultimate mind shifter for an indication of the gears not properly shifting and picking up speed. As I road about 70mph I left laned to pass vehicles slowing on right. As I accelerated to pick up speed it topped off at 80! I continued to press gas petal slowly down till reached floor then I slowed and got back in the rt lane! cruised it down to about 50 and put it in standard! 5th gear and sped up till gear change and put in 6th gear for ride. It did not puck up speed as it should've and it still stalled at 80!!!!!! there's more to this on small notes and I know something is off! I'm no crash dummy! the 2018 Kia doesn't smoothly accelerate either from a stopped point. Acts as if there's horse power with easing on the gas from a stopped point. Also with A/C on driving it makes a wired noise after awhile. That happened twice where I turned it off. When manually driving it's like riding in standard without upshifting with the stick. Feels like I have to let off gas for it to properly change gears then accelerate. It's like the car does what it want and I have to work with it! that's scary! I haven't had the vehicle over a month! I told dealership where bought it from and they said if no lights came on there's pretty much nothing. Car doesn't even have 70,0000 miles on it!!! I'd hate not to prevent something seeing I explained this!

- Longview, TX, USA

Note: The individual submitting this statement of facts is prepared and willing to testify before congress or any court of law that all of which that is contained within this submission is based on facts and truth. Also let it be known a degree in "applied science in automotive & diesel technology and advanced drill fluids technology & engineering" is held by this individual and the later degree deals with the construction and engineering of newtonian and non-newtonian fluids (I.e.> water based and oil based fluids such as a engine oil ) is well within the individuals understanding of the molecular construction and deconstruction of elements. I was approached by a friend who had a situation that required quick action if any hopes of a remedy were to prevail, and the end result for myself would be owning a 2018 Kia Forte. The said vehicle had a total of 41,117 miles calculated and displayed on the information display attached to the instrument cluster. The vehicle was well maintained by the Kia dealership as promised up to the warranty period of 12000 miles as promised by Kia, at no extra charge to the customer. Afterwards the 1st original owner would continue the schedules service as outlined in the owners manual. This maintenance service would always be performed at the owners usual trusted repair shop and if not within the area at the time service was needed, a reputable repair shop would be the choice. With a well maintained vehicle in my possession I soon experienced an engine failure due to metal shavings causing poor oil circulation and paired with several other factors causing sludge build up which rendered my vehicle garbage. The dealership claimed it was due to negligence and improper maintenance. The failure happened while my children were in the vehicle during a thunderstorm with flash flooding. "satisfaction guarantee" is a lie !

- Palestine, TX, USA

Ive had my car since 38 miles. This is my second year owning it. It has been well kept and it started having problems about a month ago that has gotten worse. It shakes really bad at 30mph and stays in 6th gear. It also has major problems picking up speed and shifting in general. Sometimes it just stalls and dont go. When switching lanes on the interstate it slows way down and doesn't shift. It doesn't matter my speed. From 10-50mph and up it skips gears and stalls.

- Clyde, NC, USA

This problem happened 2 times this week & on 2 separate days while I was driving & since I only drive this car once or twice a week this has me concerned.. the car started ok and drove for a couple of miles just fine when suddenly the car felt like I was trying to drive while the car was in neutral & even with my foot was on the gas pedal the car wasn't going anywhere.. I pulled off the road to get out of the flow of traffic & tried to put the shift lever in a different gear but it was stuck in drive even when my foot was firmly on the brake pedal, so I tried to 'jiggle' it a little from left to right but the shift lever wouldn't really move so I just sat there.. after a few minutes I made an attempt to safely pull out into traffic & the car hesitated a little but then drove fine.. when this happened the first time this week I ignored it and treated it as a 'one time only' issue, but then it happened a second time so I got concerned and made an appointment with citrus Kia for 3/15/19 to have this checked out.. I'm not sure if anyone else is experiencing this but felt I should report it and will update this after the Kia dealer has a look at it..

- Ocala, FL, USA

This is a follow-up to my original complaint # 11088519 on 4/10/18.. when I brought the vehicle to the dealer on 4/25/18, I was told it was a bad spark plug huh on a new car; what would be next.. in any event the dealer had to order the spark plug another huh on that too.. spark plug is in & I have an appointment tomorrow 5/2/18 to replace & repair & none too soon because the car sounds & runs 'terrible'.. sitting at a light it sounds worse than the 2016 fiesta I traded in terrible rough idle & really bad when accelerating from a light which could be dangerous.. this Kia Forte at present has 465 miles on the odometer..

- New Port Richey, FL, USA

Well at present my car only has about 400 miles on it I only picked it up on 4/4/2018 & it's starting to sound like the 2016 Ford fiesta I traded in.. when stopped at a light the idle gets rough and if this was the 1960's I would say it had a bad spark plug or carburetor issues; however, this is 2018 so not sure but it's the only thing I can relate the idle issue with.. I spoke with the salesperson at the dealership that sold me the car but he said he knows nothing about inner workings of cars so I made an appointment with the service department for 4/25/2018 since I cannot get there at the times they want me to; and until then I can only monitor it.. this issue started after I had the car approximately one week; nothing like Florida car dealers selecting a car for me off their lot that has issues..

- New Port Richey, FL, USA