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2018 Kia Optima — car pulls right even though alignment is green

CanyonNomad647Community StarterJan 19, 20262018 Kia Optima EXCleveland
2018 Kia Optima EX, about 96,000 miles. Alignment printout is within spec, but the car still wants to drift right on a flat road. Tire pressures match. Would you cross-rotate tires to check radial pull, or look harder at caster/camber side-to-side?
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25 replies

CanyonSeller103Community StarterCommunity StarterJan 19, 2026permalink
Intermittent stuff lies if you only catch it once. Swap the cheap/easy piece first on the 2018 Kia Optima and see if the fault moves. That's the branch I'd chase this week. On “car pulls right even though alignment is,” that was the fork that mattered for me. Happy to compare notes if your setup is different. I'll update if anything new shows up.
V8OwnerCommunity StarterCommunity StarterJan 19, 2026permalink
Start with the test that can prove you wrong. Capture voltage while the 2018 Kia Optima is actually failing — after it restarts you've lost the clue. You'll know quickly if you're on the wrong tree. No need to make it theatrical. I'm in no rush to be a hero on it.
TireBuilder162Community StarterCommunity StarterJan 19, 2026permalink
I wouldn't throw parts yet. Move a coil or plug on the 2018 Kia Optima if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. This is from a 2018 Kia Optima in Cleveland with 96,000 miles. I'd want a dollar figure or a measured spec, not 'should be fine.' Heat soak after errands is the other window.
OldSchoolGeek895Community StarterCommunity StarterJan 19, 2026permalink
I'd want a measurement, not a hunch. A pressure test beats staring at a dry driveway if the 2018 Kia Optima is losing coolant with no puddle. Don't erase codes until someone who can help has seen them. Keep sale price, fees, and rate as three different conversations. Might be overthinking it, but I'd rather overthink than overspend.
CanyonTuner815Community StarterCommunity StarterJan 20, 2026permalink
Not convinced that's the whole story. Swap the cheap/easy piece first on the 2018 Kia Optima and see if the fault moves. If the cheap test changes it, stop and reassess. If it doesn't change the out-the-door or the repair estimate, it's noise. Parking it somewhere I can hear it better next time.
CleanCollector835Community StarterCommunity StarterJan 19, 2026permalink
Ask what changed right before it started. Move a coil or plug on the 2018 Kia Optima if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. When does it actually happen? This is me being the wet blanket on purpose.
CanyonNomad647Community StarterCommunity StarterJan 19, 2026permalink
I went back under the 2018 Kia Optima and it only happens after a heat soak, not on a cold start. Video is ugly but it shows the hesitation.
CanyonTuner815Community StarterCommunity StarterJan 19, 2026permalink
Intermittent stuff lies if you only catch it once. Move a coil or plug on the 2018 Kia Optima if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. On “car pulls right even though alignment is,” that was the fork that mattered for me. I'd want a dollar figure or a measured spec, not 'should be fine.' No warning lights, which is why I'm documenting it.
CanyonTuner815Community StarterCommunity StarterJan 19, 2026permalink
Intermittent stuff lies if you only catch it once. Swap the cheap/easy piece first on the 2018 Kia Optima and see if the fault moves. That's the branch I'd chase this week. On “car pulls right even though alignment is,” that was the fork that mattered for me. Run the total, not the monthly, before you commit. Trying not to diagnose from the couch.
EVTraveler220Community StarterCommunity StarterJan 19, 2026permalink
I'd want a measurement, not a hunch. Swap the cheap/easy piece first on the 2018 Kia Optima and see if the fault moves. Don't erase codes until someone who can help has seen them. Take it or leave it — that's what I'd do. I keep a notes app thread for this now.
SunBeltTuner903Community StarterCommunity StarterJan 19, 2026permalink
I'd want a measurement, not a hunch. Get a real battery/charging test on the 2018 Kia Optima, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. This is from a 2018 Kia Optima in Cleveland with 96,000 miles. Take it or leave it — that's what I'd do. No warning lights, which is why I'm documenting it.
PistonCollector78Community StarterCommunity StarterJan 19, 2026permalink
Log the conditions before you spend. Swap the cheap/easy piece first on the 2018 Kia Optima and see if the fault moves. That's the branch I'd chase this week. On “car pulls right even though alignment is,” that was the fork that mattered for me. This is from a 2018 Kia Optima in Cleveland with 96,000 miles. Post the numbers (or the code) and people can get more specific. This is the filter I use when the thread starts repeating itself. Doing the boring step first on purpose.
CleanCollector835Community StarterCommunity StarterJan 20, 2026permalink
I hear you, though I'd still want a second check. Write temp, speed, and in-gear vs coast when the 2018 Kia Optima does it — then decide on parts. That's the branch I'd chase this week. Was this after sitting overnight? I'd rather look cautious in this thread than stuck later.
CanyonNomad647Community StarterCommunity StarterJan 21, 2026permalink
Checked the easy stuff on the 2018 Kia Optima and found one clue worth chasing before I book a shop. Wrote this up on my lunch break.
RoadTripSellerCommunity StarterCommunity StarterJan 19, 2026permalink
I wouldn't throw parts yet. Two 2018 Kia Optimas can feel identical and have different causes, so measure before you copy someone else's repair. That's the branch I'd chase this week. Do that first. I've seen both outcomes, which is why I'd test instead of assume. If it repeats twice more I'll book time.
EVTraveler220Community StarterCommunity StarterJan 20, 2026permalink
I wouldn't throw parts yet. A pressure test beats staring at a dry driveway if the 2018 Kia Optima is losing coolant with no puddle. Save the big job until that test fails. Take it or leave it — that's what I'd do. I'll update if anything new shows up.
PistonCollector78Community StarterCommunity StarterJan 20, 2026permalink
This is usually cheaper to test than to guess. Two 2018 Kia Optimas can feel identical and have different causes, so measure before you copy someone else's repair. Don't erase codes until someone who can help has seen them. Happy to compare notes if your setup is different. If that fails I'll eat the diagnostic fee.
OldSchoolTunerCommunity StarterCommunity StarterJan 21, 2026permalink
Not convinced that's the whole story. Get a real battery/charging test on the 2018 Kia Optima, not just resting voltage, before blaming a module. Save the big job until that test fails. Time, temperature, and whether it's in gear are the notes that actually help a shop. If the story changes I'll post the new data.
V8OwnerCommunity StarterCommunity StarterJan 20, 2026permalink
I'd want a measurement, not a hunch. Get a real battery/charging test on the 2018 Kia Optima, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. That's the sequence I'd use. Might be overthinking it, but I'd rather overthink than overspend.
CanyonNomad647Community StarterCommunity StarterJan 20, 2026permalink
Cleared nothing. I want service to see the alert on the 2018 Kia Optima first. Parking it somewhere I can hear it better next time.
SleeperHauler371Community StarterCommunity StarterJan 20, 2026permalink
This is usually cheaper to test than to guess. Two 2018 Kia Optimas can feel identical and have different causes, so measure before you copy someone else's repair. You'll know quickly if you're on the wrong tree. No need to make it theatrical. A day of patience here is cheaper than a wrong part. I already checked the easy fluid levels.
CanyonNomad647Community StarterCommunity StarterJan 20, 2026permalink
Cleared nothing. I want service to see the alert on the 2018 Kia Optima first. Only after sitting overnight so far.
CleanCollector835Community StarterCommunity StarterJan 20, 2026permalink
Start with the test that can prove you wrong. Loaded-suspension checks on the 2018 Kia Optima catch play that a wheels-hanging inspection misses. Save the big job until that test fails. When does it actually happen? I'd rather pay for diagnosis than a second guess-repair.
SleeperWeekendCommunity StarterCommunity StarterJan 20, 2026permalink
Log the conditions before you spend. Capture voltage while the 2018 Kia Optima is actually failing — after it restarts you've lost the clue. If the cheap test changes it, stop and reassess. On “car pulls right even though alignment is,” that was the fork that mattered for me. This is from a 2018 Kia Optima in Cleveland with 96,000 miles. Post the numbers (or the code) and people can get more specific. This is the filter I use when the thread starts repeating itself. Cold start is when I can actually reproduce it.
NewCarMechanicish876Community StarterCommunity StarterJan 20, 2026permalink
Ask what changed right before it started. Write temp, speed, and in-gear vs coast when the 2018 Kia Optima does it — then decide on parts. Don't erase codes until someone who can help has seen them. Learned this the expensive way on a previous car. That's coming from doing this as an owner, not a shop. Heat soak after errands is the other window.
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