The Kia Sportage 2019 has a mileage of 51,000 miles.

[baelicious]

I am experiencing problems with the automobile, although owning it for less than 9 months. I purchased the automobile based on its reputation for reliability and the added assurance of a 7-year guarantee. However, I am now quite dissatisfied with the vehicle.
I have had many instances when driving on the motorway where, despite being in 6th gear, the vehicle's acceleration abruptly ceases to function. The engine rpm stay high, but the car fails to accelerate. It seems to have entered a state similar to limp mode. The fuel injector code was detected during the first setup, and after replacing it, there was no improvement. There are no other trouble codes.
Once again, this morning I had a recurring issue on the motorway that leaves me feeling vulnerable and helpless, especially with my children in the backseat. It seems that no matter how hard I try to accelerate, my vehicle's speed grows very slowly, like to the pace of a snail. Approach an intersection, attempt to accelerate, and notice a gradual increase in speed, followed by an abrupt return to the usual speed after some time. I am completely exasperated with it. I am in dire need of solutions since it instills great fear in me!On the verge of returning the car and forfeiting my deposit and HP.

[Dudeta]

Is the vehicle powered by diesel, petrol or a hybrid engine? Does it have a manual gearbox or a dual-clutch gearbox (DCT)?
From where did you purchase the automobile?

[baelicious]

Arnold Clark offers a 1.6 Diesel car with a manual gearbox.

[Boxck]

I trust that you have promptly filed a report on this problem during the first six months of purchasing the vehicle.

Is this occurrence consistent? After cleaning the injectors, did they not do a test drive on the motorway?

[tr4s]

Has it been regularly maintained? Therefore, the number of stamps in the service book would either be 4 or 5, depending on the registration date.

It is possible that the gasoline filter is obstructed or contaminated with water.

[baelicious]

Thank you for responding, gentlemen. The problem occurred about 7 months after the purchase, which regrettably exceeded the 6-month warranty period (as is often the case!). Upon obtaining the injector code, I contacted Kia. However, they informed me that they were unable to schedule an appointment for me for more than a month. As a result, I decided to seek the services of my own mechanic, who I have great confidence in. I procured the necessary components from Kia, and I can provide receipts as evidence. The injectors are now in good condition and there are no observable fuel or other types of leaks. The problem is sporadic, so even if they conducted a test drive, the vehicle may just choose to function properly. During my experience on the motorway, I have seen that there is a lack of power while driving in 6th gear. The problem has never occurred while the vehicle is in lower ratios, but it consistently has a disruptive behaviour in sixth gear. I have just begun using reputable diesel stations due to my extensive research on the substandard quality of store gasoline. Is the gasoline filter installed as well? Could that be a problem? I apologise, but I have no knowledge or expertise in cars. I just needed a dependable automobile suitable for two small children and a crippled dog. While it meets most criteria, it is just giving me undue worry.

[tr4s]

What is the consequence if you shift down to 5th gear and then it occurs?

[Wordcar]

In a prior post, you said that the vehicle did not accelerate smoothly from a junction. However, your latest post indicates that this issue only occurs when the vehicle is in 6th gear.
At what velocity are you travelling in 6th gear, and what is the engine's RPM when the problem occurs?
The 6th gear will have a very high ratio, specifically intended for efficient cruising on motorway-like routes rather than for quick acceleration. (Apologies if this comes off as patronising, but you said that you are not knowledgeable about cars.)
If the engine revolutions increase while the speed remains constant, it indicates a potential issue with the clutch sliding.
Does the automobile exhibit a rapid acceleration or maintain the same speed when you downshift (e.g., from 6th gear to 4th gear) and fully use the throttle?

[SlayNeo]

If you find yourself in 6th gear and have released the accelerator, but still need acceleration, I would recommend downshifting to 5th gear. Attempting to increase speed when in 6th gear will likely result in a lack of power and excitement.

[Racerse]

I own a 1.6 diesel mild hybrid vehicle that had identical issues. The device would experience a loss of power until I performed a restart. Occasionally, it would function normally for many weeks before requiring another restart, but at other times, it would immediately encounter the power issue again. Upon scanning, I discovered an intermittent problem with the injector. However, after many visits to the dealership, they were unable to identify any issues. Finally, after almost two years, I have replaced the defective one and the vehicle is now operating flawlessly, achieving a fuel efficiency of 55 miles per gallon in urban areas and driving as if it were brand new. My suggestion is to switch off the ignition for 30 seconds, restart the system, and if the issue persists, it would be advisable to inspect the injectors.

[baelicious]

Apologies for any confusion. Currently, I do not encounter any issues while operating in 5th gear. However, once I shift into 6th gear, problems arise. Even if I downshift, the vehicle remains in a restricted performance mode. This morning, while travelling at 70 mph on the motorway in 6th gear, I suddenly experienced a loss of power from the accelerator. Despite pressing down on the pedal, the car did not respond. Consequently, the vehicle began to decelerate, prompting me to shift back to 5th gear. Although the engine revs remained between 2000 and 3000, the turbo, which I assume is responsible for providing additional power, failed to engage. This situation persists until I turn off the ignition. When exiting the motorway, the vehicle's performance is severely compromised, resulting in a lack of speed and a slow acceleration. This makes it impossible to quickly depart a junction. The car has been regularly serviced and is in excellent condition. I have undergone driving examination courses and consider myself a very skilled driver. Despite this, no warning lights appear on the dashboard, which has puzzled my technician since no issues are detected while running diagnostics. I am reluctant to invest a significant amount of money on a problem that I have little knowledge about. Hopefully, it is now clearer and easier to understand.

[Racerse]

Based on your statement, I infer that the issue persists until you deactivate the ignition. Consequently, I assume that when you begin driving again, the problem is temporarily resolved. Is my understanding correct? If that is the case, then mine was precisely the same.

[MagicPod]

The occurrence of your automobile entering limp mode often results in the activation of the engine malfunction indication or the generation of a fault code, but this is not always the case. There are several disorders that may give rise to these symptoms. Regrettably, the process of diagnosing these conditions can be protracted. As you are well aware from your own experience, it takes time for the ailment to manifest, which can be distressing in terms of the amount of time spent and the associated discomfort. I have personally encountered several difficulties such as malfunctioning exhaust temperature sensors, oxygen sensors, damaged wires, fuel filter problems, the accidental addition of adblue into the fuel tank, faulty turbo actuator, and egr valve troubles. All of these factors might contribute to the situations you are now facing. If you are unwilling to pay for the time it takes to diagnose the issue, I suggest purchasing a diagnostic tool that is compatible with a smartphone app, such as topdon topscan or xtool advancer. I'm certain that other individuals here may provide further options. By providing a diagnostic code or a snapshot of the ECU data at the time of the malfunction, you may assist your chosen dealer or repair. Based on your own acknowledgment, it is evident that you lack knowledge about cars. However, these applications are remarkably user-friendly and much more convenient, not to mention cost-effective, compared to going to the authorised dealer or a technician.
Furthermore, I fail to see why, at an age of less than 7 years and mileage of 100,000, which is still within the manufacturer warranty period, you personally incurred the expenses for a whole set of injectors. That must have cost you a significant amount!