why is my Alfa Romeo Giulia 952 (2016-Present) struggling to start

Symptoms

• Engine cranks slowly or not at all
• Dashboard lights dim or flicker during starting attempt
• Clicking sound when turning the key
• Check engine light illuminated
• Fuel pump noise is absent or inconsistent
• Engine stalling shortly after starting

Diagnostic Steps

1. Scan for error codes using an OBD-II scanner to check for any stored trouble codes.
2. Inspect the battery for corrosion on terminals and check voltage with a multimeter (should read around 12.6 volts when fully charged).
3. Test the starter motor for proper operation by checking voltage at the starter during cranking.
4. Examine fuel delivery by listening for the fuel pump operation when the ignition is switched on (should hear a faint whirring sound).
5. Check fuses related to the starting and fuel systems for continuity and functionality.
6. Inspect the ignition switch for wear or faults that may prevent starting.

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, battery terminal cleaner, safety goggles, gloves.
• Safety Warnings: Disconnect the battery before working on electrical components to avoid shock or short circuits.

2. Battery Inspection and Replacement

1. Clean battery terminals using a battery terminal cleaner.
2. If voltage is below 12.4 volts, charge the battery or replace it if it fails to hold a charge.
3. Reconnect the battery terminals securely.

3. Starter Motor Testing and Replacement

1. If the starter motor is suspected, remove it by disconnecting the battery again and unbolting the starter from the engine.
2. Test the starter motor using a bench test: connect it directly to a known good battery to see if it spins.
3. If defective, replace the starter motor with a new or refurbished unit, ensuring proper alignment and secure mounting.

4. Fuel System Inspection

1. If the fuel pump is not operating, check the fuel pump relay and fuse.
2. If they are functional, remove and test the fuel pump by applying power directly to it to see if it activates.
3. Replace the fuel pump if it does not activate or if fuel pressure is below specification.