my Alfa Romeo Giulia 952 (2016-Present) has bad gas mileage what's wrong

Symptoms

• Check engine light illuminated
• Decreased fuel efficiency
• Engine stalling during acceleration
• Rough idling
• Unusual fuel odor
• Increased emissions from the exhaust

Diagnostic Steps

1. Scan for error codes using an OBD-II scanner to identify possible faults.
2. Check fuel pressure to ensure the fuel pump is functioning correctly.
3. Inspect the air filter for clogs or restrictions.
4. Assess the condition of the spark plugs and ignition system.
5. Examine fuel injectors for clogs or leaks.
6. Inspect the exhaust system for blockages or leaks.
7. Check for any vacuum leaks in the intake system.

Solution

1. Preparation

• Gather tools and materials needed for repairs.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Replace Air Filter

• Tools Required: Screwdriver, replacement air filter
• Remove the air filter housing cover using a screwdriver.
• Take out the old air filter and inspect it for dirt and obstructions.
• Insert the new air filter, ensuring it fits snugly, and reassemble the housing.

3. Fuel Injector Cleaning/Replacement

• Tools Required: Fuel injector cleaning kit or replacement injectors, wrench set
• Disconnect the fuel lines carefully and relieve fuel pressure.
• Remove the fuel rail and fuel injectors from the engine.
• Clean the injectors using a cleaning kit or replace with new ones.
• Reinstall the injectors and fuel rail, ensuring all connections are secure.

4. Spark Plug Inspection and Replacement

• Tools Required: Socket set, torque wrench, new spark plugs
• Remove the ignition coils or wires from the spark plugs.
• Using a socket, remove the spark plugs and examine them for wear or fouling.
• Install new spark plugs, torqueing them to the manufacturer's specifications.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
• Use a smoke machine to introduce smoke into the intake system to identify leaks, or spray carburetor cleaner around vacuum hoses and connections while the engine is running.
• Repair any identified leaks by replacing damaged hoses or gaskets.