what could cause my Cadillac Escalade T1XX (2021-Present) to have inconsistent acceleration

Symptoms

• Check engine light illuminated
• Hesitation during acceleration
• Unstable engine RPMs
• Sudden loss of power
• Rough or jerky acceleration
• Poor fuel economy

Diagnostic Steps

1. Scan for error codes using an OBD-II scanner to identify any diagnostic trouble codes (DTCs).
2. Inspect the throttle body for carbon buildup or obstruction.
3. Check the mass airflow sensor (MAF) for proper operation and cleanliness.
4. Verify fuel pressure using a fuel pressure gauge to ensure adequate fuel delivery.
5. Inspect the ignition system components, including spark plugs and ignition coils, for wear or damage.
6. Check for vacuum leaks in the intake system that could affect air-fuel mixture.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shock or short circuits.
• Ensure the vehicle is on a level surface and use wheel chocks for safety.

2. Clean the Throttle Body

• Remove the throttle body from the intake manifold.
  • Tools: Socket set, ratchet, and extension.
• Use throttle body cleaner and a soft cloth to clean the throttle plate and inside of the housing.
• Reinstall the throttle body, ensuring all bolts are torqued to the manufacturer’s specifications.

3. Inspect and Clean the Mass Airflow Sensor

• Remove the MAF sensor from the intake duct.
  • Tools: Screwdriver or socket set.
• Use MAF sensor cleaner to spray clean the sensor element, avoiding contact with the wires.
• Reinstall the MAF sensor, ensuring a secure fit.

4. Check Fuel Pressure

• Locate the fuel rail and connect a fuel pressure gauge.
• Turn the ignition to the ON position without starting the engine and check the pressure reading against the specifications in the service manual.
• If pressure is low, inspect the fuel filter and fuel pump for issues.

5. Inspect Ignition System

• Remove the spark plugs for inspection.
  • Tools: Spark plug socket.
• Check for wear, carbon buildup, or damage; replace if necessary.
• Inspect ignition coils for cracks or signs of arcing; replace faulty coils.

6. Check for Vacuum Leaks

• Inspect all vacuum hoses and connections for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to detect leaks around the intake manifold and hoses.
• Repair or replace any damaged hoses or gaskets.