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2020 G70 3.3T Cranks But Won't Start - No Engine Firing

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Sarah K. · rep 0 · May 25, 4:34 AM · 1 replies · solved · Question

Vehicle: 2020 Genesis G70 3.3T AWD

Hi everyone,

I'm having a major issue with my 2020 Genesis G70 3.3T AWD. This morning, I went to start it, and it just cranks and cranks, but the engine won't actually fire up. It sounds like it's trying, but it just won't catch.

There are no warning lights on the dash, not even a check engine light. The battery seems fine, as it's cranking strongly. I've tried cycling the ignition a few times, but no luck. It was running perfectly fine yesterday.

Could this be a fuel pump issue, or maybe a sensor like the crankshaft position sensor? I'm stranded and really need some ideas on what might be going on. Any suggestions for troubleshooting steps I can try?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:34 AM

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ClearTheCode admin answer:

A 'crank but no start' condition on your 2020 Genesis G70 3.3T typically points to a lack of one of the three essential elements for combustion: fuel, spark, or air (compression is less likely to suddenly fail across all cylinders). Since there are no dash lights, it can be trickier to pinpoint without a scan tool.

Here's what to investigate:

  1. Check for Fuel Pressure:
    • Listen for the fuel pump prime: When you turn the ignition to the 'ON' position (without cranking), you should hear a faint whirring sound from the rear of the car for a couple of seconds. This indicates the fuel pump is priming.
    • If you have access to a fuel pressure gauge, connect it to the fuel rail to check for adequate pressure during cranking.
  2. Check for Spark:
    • This is harder without specialized tools. A quick, albeit risky, test involves removing a spark plug, reconnecting its coil, grounding the plug, and having someone crank the engine to see if a spark occurs. Be extremely careful with high voltage.
  3. Check for Air and Sensors:
    • Ensure the air intake isn't blocked. This is unlikely to be a sudden cause but worth a quick check.
    • Crankshaft Position Sensor (CKP): A common culprit for 'crank no start'. If the ECU doesn't receive a signal from the CKP, it won't know when to fire the injectors or coils. A faulty CKP often doesn't trigger a CEL until multiple failed start attempts, or sometimes not at all if it fails intermittently.
    • Camshaft Position Sensor (CMP): Similar to the CKP, a faulty CMP can prevent the engine from starting.

When to See a Shop:

  • If you're unable to determine if you have fuel pressure or spark.
  • If you suspect a faulty crankshaft or camshaft position sensor, as replacement can be intricate.
  • If the issue is intermittent or if you've tried basic checks without success. A professional can use a diagnostic scanner to check for pending codes, live data from sensors during cranking, and perform more advanced tests to isolate the problem efficiently.
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