2017 Kia Forte: misfire or rough idle

Filed May 4, 2026 · Engine · 113,922 miles · GA

The contact owns a 2017 KIA Forte. The contact stated while operating the vehicle at an undisclosed speed, the vehicle was misfiring, severely shaking and was losing motive power suddenly while operating on multiple constantly for about 3 weeks, and state she noticed a check engine warning light illuminated. The vehicle was driven to a independent mechanic where it was diagnosed to be a timing chain failure. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 113,922.

Filed Mar 18, 2024 · Engine · KY

Engine light came on and off intermittently and then stayed on. Idle was rough and engine almost stalled. When scanned a P0301 code was thrown (misfire on cylinder 1).

Filed Jan 1, 2024 · Electrical, Engine · OH

Starting around 50k mileage, the engine experienced misfire-like issues: rough idling & transitory reduction of power during acceleration and cruising. This was brought to the dealership multiple times, but the check engine light had never come on, nor were there any error codes saved in the OBD system. After 60k mileage, the check engine light did come on temporarily, but would automatically clear, still without any error codes saved in OBD. Around 65k mileage, the vehicle could not accelerate to highway speeds, so I had it towed to the dealer and refused to take it back until they found the issue. They then observed an error saved in OBD showing a misfire on cylinder 3. Replaced all spark plugs + coil packs, which seems to have corrected the problem. After 70k mileage, I observed that the engine burns oil, about 1 quart per 3k miles. This rate has stayed consistent up to the current 100k mileage.

Filed Dec 5, 2023 · Engine · CA

My engine shutoff/misfired while I was driving. The rest of my vehicle maintained power, dashboard headlights, radio. I took it to an autoshop where the issue was replicated. When my engine shut off the I had three check lights come on eps, oil, and battery. There was no warning prior to the engine shutting off.

Filed Aug 5, 2023 · Fuel system · CA

I purchased this vehicle second hand at 43k miles. The issue began around 50k miles and would rough idle when coming to a stop and a check engine light appeared. At 55k miles it was taken to a Kia dealership where they were unable to diagnose the issue. They ran a diagnostic and found nothing. Shorty after, the issue persisted. I took it back to the Kia dealership where they were able to run another diagnostic on the check engine light, and they told me it was the spark plugs. I did not believe this as my father has been a technician for over 40 years and said that the issue seems to be an ignition coil issue. I never took the vehicle back to any Kia or IRF since. I’ve replaced 1 coil and the issue smoothed out. Some time after, the issue began to worsen and continue to intermittently over the course of months, rough idle, shoot up in rpms, stall while accelerating, and once or twice it has shut off completely while at a stop light. Unfortunately, I have so far replaced 2 coils and the issue is moderate but not to the point of shutting off. The vehicle is eligible for inspection upon request. I do NOT feel safe driving this vehicle, and it’s unfortunate for me as it is my first vehicle.

Filed Feb 15, 2023 · Engine · CA

Hi there, I got my 2017 Kia Forte brand new. Over the past 6 years, I’ve had to replace the ENGINE IGNITION COILS half a dozen times. Kia refuses to recall this vehicle for this problem, which is very common among other drivers. Just go online and search “2017 Kia Ignition Coil problem” and you will find thousands of people reporting on the same issue with a multitude of the same symptoms: rough idling, shaking vehicle, RPM jumps, check engine light on, etc. The irony is, when I first took my vehicle to a Kia dealership for service, they were fully aware of the issue and alleged recall (their words, not mine). In fact, THE MECHANIC is the one who informed me about the recall 5+ years ago when my first coil misfired. He said the part was recalled, and they would fix free of charge. This was the first time I heard about the recall. NO ONE from Kia had contacted me. No call, email, text, snail mail. Nothing. When an engine ignition coil fails, you run the risk of having your vehicle caught on fire and explode. How on Earth is Kia getting away with keeping this information secret from its customers?? The 2017 Kia Forte has 6 engine ignition coils. I’ve since replaced nearly all of mine - and note, Kia dealerships REFUSE to replace them all at once as they need proof they’re officially “bad” before replacing. Thousands of other customers have also reported going back to the shop over, and over, and over again to get these coils fixed. Kia needs to be held accountable for the safety of these vehicles. Kia needs to recall these cars, and refund customers who have already fixed their cars. In 2020, the federal safety agency announced civil penalties for Kia for NOT recalling vehicles in a timely manner. We need to keep Kia in check, and hold them accountable for the unacceptable and incredibly dangerous position they continue to put their customers in.

Filed Dec 9, 2022 · Engine · FL

Cylinder 2 is misfiring and causing the engine to get out of rhythm. The car begins shaking and the engine struggles to keep running. The car feels like it will stop running at any given point of when it happens. The check engine light only appears when at a complete stop or when my foot is on the gas. When I take my foot off the gas and the car cruises, the check engine light goes away, making it extremely difficult to catch/code.

Filed Jun 1, 2021 · Engine · GA

The car keeps giving a misfire code. Kia says the only recall is for the coil boots. They replaced the coil boots and the car is still giving the misfire code. I see lots of people having to replace the coils to fix the problem. I asked kia about this and they say there is no problem with my coils. At this point my car isnt usable and kia says theres nothing they can do. The car loses power and stalls while driving along. It also does the same thing while at an idle.

Filed Feb 10, 2021 · Engine · 50,000 miles · FL

Tl* the contact owns a 2017 kia forte. The contact stated that the vehicle failed to start-up. No warning light was illuminated. The vehicle was towed to kia autosport of pensacola (6637 pensacola blvd, pensacola, fl 32505). The contact stated that the dealer claimed that the vehicle started with no problem. The contact also mentioned that the ignition coil and spark plug may have caused the vehicle not to start or misfire. The vehicle was not repaired. The manufacture was not made aware of the failure. The failure mileage was approximately 50,000.

Filed Aug 21, 2020 · Engine · 35,000 miles · IL

My check engine light came on. Took it to the shop and was told there was something in the engine that needed a reset or update. They fixed it with no charge and told me to come back if it came on again. The check engine light came back on the next day. I took it back and was told one of my cylinders was misfiring so they fixed it and I was charged. 3-4 months later my check engine light came back on. I took it in and was told that it was an old code stored in the car. They cleared the code and told me if the light comes on again to bring it back. The check engine light came on less than 48 hours later. This is friday august 21, 2020, I have an appointment on august 29th to check my car. When my check engine light comes on my car hesitates when I step on the gas. The check comes on and goes off. When the light is off I don't experience the hesitation in the acceleration. It may come on and stay on for a few days and then the check engine light will go off and remain off for 1 to 2 days. This will be my 4th time taking my car in for the same issue.

Filed Aug 17, 2020 · Engine, Fuel system · 30 miles · PA

Rough idling. Rough gear shift from 1st to 2nd and srutter on 3rd. Loss of power during take offs. Car is only 20,800 miles. Checked twice on dealer. Only wiped code and reset computer. Claim not to be able to replicate. Issue comes back with check engine light 30 mins after driving away.

Filed Apr 30, 2020 · Driver assistance, Engine · 28,000 miles · OH

I purchased this vehicle dec. 2017 with 318 miles. Vehicle began to sputter when trying to start. First time, towed in was told nothing was wrong. Went home, next morning the vehicle sputtered to start. After 3rd try & loud sounding, I popped the hood & the entire engine was shaking in its cradle. Towed in again, dealership diagnosed coils misfire & replaced. Vehicle duplicated the same problem a week later. I replaced the battery. Vehicle would not start again the next day. Third time, dealership diagnosed fuel pump but ended up replacing the entire fuel injection system because replacing the fuel pump did not fix the matter. They had my vehicle for 2 full weeks. Had the vehicle back 2 days, vehicle would not start but continued to sputter. Dealership has now had my vehicle 5 weeks, first said they couldn't get it to duplicate the problem but kept my vehicle anyway. Then said coils were bad even though they just replaced them 3 months ago something is causing the coils to misfire. I have no answers. Even with kia consumer affairs involved, no one has an answer. At one point kia consumer affairs called to ask me how the vehicle was running because the dealership told them they did not even have my vehicle anymore. I thought I was going to have to make a report to my insurance carrier. My vehicle has 30,000. I've maintained regular oil changes & other required maintenance as suggested, faithfully.