Kia Troubleshooting Questions? Ask a Mechanic
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Where there codes for all of the items that you have changed?
Ok, have you performed a compression test or a cylinder leak down test on these cylinders?
Since the system is not setting any codes, this would need to be the next step. This issue sounds like the issue is mechanical with the engine.
Yes, these vehicle had a common issue with the valves and valve seats leaking and causing this issue.
No low compression will normally not set a code.
No problem, thank you.
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