Cylinder 2 Misfire

[Bubblehead]

Hi all!
I ran into an issue this morning on my way to work. Started the car up and the dash lit up with lots of unhappiness. Stabilitrack Disabled and the check engine light flashing at me. Plugged in HP Tuners and I have the P0300 and P0302 codes. I swapped ignition wires and cleared the codes. No joy. Scanner shows some variation in my O2 sensors. I have never really paid attention to thos values so that may be something, maybe not... Any help is greatly appreciated.

Car info:
2015 SS L99
No real mods or tune yet. I have a K&N drop in filter, Taylor plug wires, and the power wedge. I turned off the AFM via HP Tuners. Drove from Virginia to Connecticut and put a few hundred miles on since with no issues.

HP tuners Info:
DTC:
0x7E8: P0300 - Random Misfire Detected
0x7E8: P0302 - Cylinder 2 Misfire Detected (Pending, Current, Permanent)

Freeze Frame:
Freeze Frame: 0
DTC: P0302 - Cylinder 2 Misfire Detected
Fuel System Status: 02 02
Calculated Engine Load: 25.8823529411765 %
Engine Coolant Temp: 56 °C
Short Term Fuel Trim Bank 1: -0.78125 %
Long Term Fuel Trim Bank 1: 0 %
Short Term Fuel Trim Bank 2: 8.59375 %
Long Term Fuel Trim Bank 2: 0 %
Fuel Pressure: 402.000419318597 kPa
Intake Manifold Absolute Pressure: 32 kPa
Engine RPM: 710 rpm
Vehicle Speed: 0 km/h
Timing Advance: 9 °
Intake Air Temp: 22 °C
Mass Airflow: 8 g/s
Throttle Position: 19.6078431372549 %
O2 Voltage B1S1: 502.48046875 mV
O2 Voltage B1S2: 384.98046875 mV
O2 Voltage B2S1: 137.71484375 mV
O2 Voltage B2S2: 44.98046875 mV
Run Time Since Engine Start: 16 s
Commanded EVAP Purge: 0 %
Fuel Level Input: 98.8235294117647 %
Warmups Since MIL Clear: 0
Distance Since MIL Clear: 0 km
EVAP System Vapor Pressure: 20 kPa
Barometric Pressure: 101 kPa
Catalyst Temp B1S1: 418 °C
Catalyst Temp B2S1: 410 °C
Control Module Voltage: 14 V
Absolute Load: 20 %
Commanded EQ Ratio: 1
Relative Throttle Position: 7.45098039215686 %
Ambient Air Temp: 0 °C
Absolute Throttle Position B: 19.2156862745098 %
Accelerator Position D: 20 %
Accelerator Position E: 9.41176470588235 %
Commanded Throttle Actuator: 10.1960784313726 %
Fuel Type: 01

[sixty9fordkiller]

i would do the easy stuff first

1. inspect the spark plug and wire connections. coils for any visible damage. injector connectors or fuel leaks at the manifold.

2. remove and inspect spark plug. if you have a snake camera, take a look inside to see if you see anything odd

3. swap coils with another cylinder and see if the issue follows the coil to the other cylinder

3b. if 3 doesnt change anything, swap a fuel injector with another cylinder's injector and see if the issue follows it to that cylinder

4. compression and leakdown test



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[Bubblehead]

Thanks!
So plan A was to swap the coil pack and see if the issue followed. Unfortunately, I am living in a Hotel and most of my tools are home in Virginia. I decided to disconnect the battery for 15 minutes, clear the DTCs, and scan for codes while firing her up.

Now i am getting a p0202 - open circuit for injector 2, looks like it has failed. I have never seen an injector go bad before. I guess I will be over-nighting an injector.

Hopefully this will fix it and I can be back on the road.

[sixty9fordkiller]

post back here with your final result/solution if you can

[Bubblehead]

I ordered one injector and an 8 pack of spark plugs. Parts will be here tomorrow and I will have it all together this weekend. The plugs are the new ruthenium type from ngk. Hopefully I will be running better than when I arrived! Thanks again for the sound advice.

[Bubblehead]

Up and running! It was a bad injector and all DTCs are clear.

The injector was easier than I thought it would be. Took just over an hour to do that and the spark plugs.

[sixty9fordkiller]

excellent

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