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Okay, I just bought myself a project car (oh lord, protect my wallet). It’s a 2017 F-Type with 59k miles. Now where to begin. Looking for some advice on what to tackle first as I feel like a lot of these are connected.

Codes errors:
P0300: Random/Multiple Cylinder Misfire Detected
P0301: Cylinder 1 Misfire
P0302: Cylinder 2 Misfire
P0303: Cylinder 3 Misfire
P050B: Cold Start Ignition Timing Performance
P2610: ECM/PCM Internal Engine Off Timer Performance
P1315: Persistent Misfire

For the P030x causes:
  • Faulty or worn spark plugs
  • Faulty spark plug wires or coils
  • Vacuum leak
  • Low fuel pressure
  • Camshaft sensor defective
  • Crankshaft sensor defective
  • Engine timing off
  • Leaking head gasket
  • Low engine compression
  • Poor quality fuel / Misfueling

For P1315 causes:
  • Cylinder compression low
  • Low fuel pressure
  • Clogged fuel injectors
  • Faulty / worn out spark plugs
  • Faulty ignition coil
  • Faulty fuel injectors
  • Faulty Engine Control Module (ECM)

For P2610 causes:
  • Faulty Engine Control Module (ECM)
  • Powertrain Control Module (PCM)
  • ECM/PCM Harness is open or shorted
  • ECM/PCM Circuit poor electrical connection
  • ECM/PCM outdated program

There is no visible leaking of any oil/coolant/etc anywhere nor any smoke from tailpipe. Everything looks “dry”. My initial thought was to just replace the fuel injectors and spark plugs first. But the inability of the car to maintain a steady idle reminds me of a vacuum leak in the PCV valve I’ve had before in a different car. Also, a little weird is the high-pitched whirring that doesn’t sound normal to me. Could that be a function of the above issues? I would imagine the ECM is giving codes because of the above issues as I’ve not heard of those guys failing often. So in recap:
1st - Replace PCV valve. Check for improvement
2nd - Replace Fuel injectors/spark plugs. Check for improvement.
3rd – Come back here for next steps.

Anything else that is easy/simple to check/replace that I should do? Check out the video on youtube of the engine running:
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