Misfire no power?

Hello, and thanks for your question!

If you had O2 sensor codes, there is a possibility there was a problem with the exhaust system and not the sensors themselves. Sure, the new sensors will function better brand new, but it most cases it only buys time. Do you by chance have the codes that were present, or can you do a scan of the vehicle now?

Please check out this link on how to perform a CAN scan:
https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Being a 2021 model, I would not be so concerned about clogged fuel lines or fuel pump assembly. Actually, the fact that it will not go above 2,000 rpm is the computer putting a limit on the system. Despite doing all of those things that you did; the computer still detects a problem somewhere.

Please let me know what you find,
William

Hello,

P0088 = Fuel Rail / System Pressure Too High

This of course can throw off fuel trim / air ratio and ruin O2 sensors, as well as cause misfires and result in the computer limiting the engine performance. I will attach the chart below on the plausible causes for this. Does your scan tool see live data? I would like to know the actual fuel rail pressure as reported by the sensor, as well as the ECT (Engine Coolant Temperature) sensor, and the exact RPM the engine is running at idle. We can try to pinpoint the issue to see if it is a sensor issue or a regulatory issue, and worst-case scenario being an ECM issue.

Hope this helps and let me know what you find.
William

Hello,

Sorry for the delay. Using that scan tool, can you see the live fuel pressure reading? And when the engine is at operating temp, what does the ECT read? Please refer to the chart above, and make sure the conditions are met. We need to get past this before we dive into electrical diagnostics or replacing parts.

Thanks,
William

Hi,

I would like to know what the ECT reads during normal vehicle operation, when the temperature gauge settles in the middle. It should not be more than 60 C. Fuel level input is only a display of how much fuel is in the tank. We need to see the fuel pressure in PSI. If we cannot see this then we will need to take a fuel pressure reading with a gauge at the fuel rail.

Let me know,
William

60 degrees Celsius is only 140 degree Fahrenheit btw. So, the ECT (engine coolant temperature sensor) could be off, but I see from the scanner it is at 94% which is good. I have seen a broken primary catalytic converter cause strange issues like this. Can you hear any kind of rattle in the exhaust when the engine is idling/revving? You might want to take a rubber mallet and tap the exhaust to see if you can hear any loose material inside. Here is how to remove the cats for a physical inspection. Check out the images (below). Please upload pictures or videos of the problem so we can see what's going on.