my Genesis G70 has a rough start on cold mornings what’s the issue

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and engine is cold.
• Disconnect the negative battery terminal to ensure safety.

2. Battery Inspection

• Sub-steps:
  1. Remove the battery terminals (negative first, then positive).
  2. Clean any corrosion from the terminals and cable ends using a wire brush.
  3. Test battery voltage with a multimeter (should be above 12.4 volts).
  4. If the battery voltage is low, recharge or replace the battery.

Tools Required: Wire brush, multimeter

3. Starter Motor Test

• Sub-steps:
  1. Reconnect the battery terminals.
  2. Locate the starter motor under the vehicle.
  3. Use a multimeter to check the voltage at the starter terminal while attempting to start the engine.
  4. If voltage is present but the starter does not engage, replace the starter motor.

Tools Required: Multimeter, socket set

4. Fuel System Check

• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Connect a fuel pressure gauge to the test port.
  3. Turn the ignition to the “ON” position without starting the engine to check the initial pressure.
  4. If the pressure is below specifications, inspect fuel pump and filter for blockages.

Tools Required: Fuel pressure gauge

5. Spark Plug Inspection

• Sub-steps:
  1. Remove the spark plug wires and spark plugs using a socket wrench.
  2. Inspect the spark plugs for wear, carbon buildup, or damage.
  3. Replace any worn or fouled spark plugs with OEM specifications.

Tools Required: Socket wrench set, spark plug gap tool