The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2019 Kona 1.6T cranking but not starting – fuel pump or fuel system?

0

Mark S. · rep 0 · May 22, 2:59 AM · 1 replies · solved · Question

Vehicle: 2019 Hyundai Kona Ultimate

Hey everyone,

I'm having a really frustrating issue with my 2019 Hyundai Kona Ultimate (1.6T engine) with about 70,000 miles. This morning, it cranked strong but wouldn't start. It just kept cranking and cranking. I tried it a few times, and it eventually sputtered to life, but then stalled after a minute. Now it just cranks and won't start at all.

I'm thinking it might be a fuel delivery issue, maybe the fuel pump? I don't hear the usual hum from the fuel pump when I turn the key to the 'on' position. I haven't checked for codes yet, but I'm wondering if anyone else has had similar problems with their Kona or other Hyundai models. What's the best way to diagnose this?

Thanks for any help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:59 AM

0

ClearTheCode admin answer:

Jessica, your description of your 2019 Kona 1.6T cranking but not starting, especially the lack of a fuel pump hum, strongly points towards a fuel delivery problem. This is a common issue that can leave you stranded, so it's good you're looking into it.

Here's a breakdown of what could be happening and how to approach it:

  1. Key Components to Consider:

    • Fuel Pump: The primary suspect. If it's not priming (making a hum) when the ignition is turned on, it's likely failed or not receiving power.
    • Fuel Pump Relay/Fuse: A faulty relay or blown fuse can prevent the pump from operating, even if the pump itself is good.
    • Fuel Filter: While less likely to cause a complete no-start, a severely clogged fuel filter can restrict fuel flow enough to prevent starting.
    • Fuel Pressure Sensor/Regulator: A faulty sensor or regulator can lead to incorrect fuel pressure, preventing the engine from starting.
    • Crankshaft Position Sensor: If this sensor fails, the engine won't know when to fire the injectors or spark plugs, leading to a crank-no-start condition (though usually without fuel pump symptoms).

  2. Common OBD Codes (if CEL appears):

    • P0087: Fuel Rail/System Pressure - Too Low
    • P0088: Fuel Rail/System Pressure - Too High
    • P0171/P0174: System Too Lean (can be caused by insufficient fuel)
    • P0230: Fuel Pump Primary Circuit Malfunction

  3. When to See a Shop:

    • Professional Diagnosis is Best: Working with fuel systems can be dangerous due to flammability and high pressure. It's highly recommended to have a professional technician diagnose this issue.
    • Initial Checks (if comfortable):
      • Check Fuses/Relays: Locate the fuel pump fuse and relay in your owner's manual and check them. You can try swapping the fuel pump relay with another identical relay (e.g., horn relay) to test it.
      • Listen for Pump: Have someone turn the key to 'on' while you listen near the fuel tank for the pump hum.
      • Scan for Codes: Even if the CEL isn't on, a pending code might be present.
    • Fuel Pressure Test: A shop will perform a fuel pressure test to confirm if the pump is delivering adequate pressure. This is the definitive test for fuel pump health.

If the fuel pump is confirmed faulty, it will need to be replaced. Ensure the shop uses quality parts and follows proper safety procedures.

Menu

Help & account