Weird issue with my kia stinger

[justn.ramos]

Can someone help me out, I've been having an issue with my 2021 Kia Stinger GT1 where it will inconsistently idle high at 1k rpm's or it will shake like it's misfiring for a split second at idle. It's been doing this since I would say February of this year and nobody can find out what the issue is. I've replaced the spark plugs, high pressure sensor, and the high pressure fuel pump and none of those are the issues. I have also bought an ignition coil tester and all my cylinders are running fine. In July my car went into limp mode and give me a code for random cylinder misfires but after I turned my car off and on again it went back to normal but with the same issues of it idling high and shaking at idle. As of recently my check engine light is on and it's a code P000C and today I just changed the high pressure fuel pump. Can someone please help me try to fix this issue it's been going on for so long and no one knows how to fix it.

 

[Snicklefritz]

You didn't mention coil packs. If you have even one bad coil pack it will destroy every spark plug that you replace, usually within a couple of weeks. Other than suggesting that, I've got nothing.

When my Premium needed to replace the high pressure fuel pump it didn't misfire. But under full boost it would "hang fire" and not shift up, then the RPMs would fall off, even though the accelerator is held down. That would also produce a CEL. So, if you replaced your HP fuel pump to correct a misfire I'd say that was some unfortunate advice.

 

[Buzzman12]

Faulty/flaky fuel injectors can also cause those symptoms.

How many miles on it? I also presume a GT1 is the V6?

 

[justn.ramos]

Faulty/flaky fuel injectors can also cause those symptoms.

How many miles on it? I also presume a GT1 is the V6?

When the issues started happening around 65k miles and yes I have the v6 3.3 liter engine

 

[Alpinesting]

The P000C code on a Kia Stinger GT1 means "A" Camshaft Position Slow Response (Bank 2), indicating the engine's computer detects the intake camshaft on the second cylinder bank isn't adjusting its timing fast enough, often due to dirty oil, a failing Oil Control Valve (OCV), a binding VVT actuator/phaser, or a bad camshaft position sensor, all related to the Variable Valve Timing (VVT) system. Fixing it usually involves changing the OCV on Bank 2, ensuring clean oil, or inspecting VVT components, with potential for more complex timing chain issues if simple fixes fail, so professional diagnosis is key.

What P000C Means

• "A" Camshaft: Refers to the intake camshaft.
• Slow Response: The camshaft isn't moving to its commanded position quickly enough.
• Bank 2: The side of the engine with cylinder #2 (in the Stinger's V6, this is typically the rear bank).

Common Causes

• Low/Dirty Engine Oil: Sludge or low oil level prevents VVT components from working correctly.
• Faulty Oil Control Valve (OCV) / Solenoid: The most common culprit; it controls oil flow to the VVT actuator.
• Binding/Damaged VVT Actuator/Phaser: The mechanism on the camshaft sprocket is sticking or broken.
• Bad Camshaft Position Sensor: Though less common for this specific code.
• Timing Chain Issues: A stretched chain or faulty tensioner can cause this.

How to Address It

1. Check Oil: First, ensure oil is clean and at the correct level.
2. Replace Bank 2 OCV: This is often the fix, requiring removal of the valve cover on the rear bank.
3. Inspect VVT Components: If the OCV doesn't work, the actuator/phaser or sensor may need checking.
4. Check Timing Chain: A scope might be needed to check for chain stretch.

Action: Because it involves the engine's critical timing, address this code quickly, starting with an oil change and possibly replacing the Bank 2 OCV.

 

[Alpinesting]

Dirty oil? Just spit balling here as this a Gemini search in Chrome. Sorry you are having troubles!

 

[Ah GetFd]

Dirty oil? Just spit balling here as this a Gemini search in Chrome. Sorry you are having troubles!

Dirty oil or gunk clogs up the vvt actuators on lots of cars. Put an oil system cleaner through which Kia does here each service.. GM its a known problem but I would put money on a stretched timing chain as the main problem but you could replace the crank angle sensor first as a cheap fix before going down the more expensive path.