my Cadillac Escalade T1XX (2021-Present) stalls when I accelerate what could be wrong

Symptoms

• Engine stalling during acceleration
• Rough idle when at a stop
• Check engine light illuminated
• Decreased power during acceleration
• Unusual engine noises (e.g., sputtering or knocking)
• Poor fuel economy

Diagnostic Steps

1. Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2. Check fuel levels and confirm that the fuel pump is functioning properly.
3. Inspect the throttle body for carbon buildup or obstruction.
4. Examine the air intake system for leaks or blockages.
5. Test the ignition system components, including spark plugs and ignition coils.
6. Check engine vacuum for leaks using a vacuum gauge.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Fuel System Inspection

• Check Fuel Pump:
  • Use a fuel pressure gauge to test fuel pressure at the rail.
  • Replace the fuel pump if pressure is below specifications.

3. Throttle Body Cleaning

• Remove the Throttle Body:
  • Disconnect the electrical connector and vacuum lines.
  • Unbolt the throttle body using a socket set.
• Clean the Throttle Body:
  • Use throttle body cleaner and a soft brush to remove carbon deposits.
  • Reinstall the throttle body and reconnect all components.

4. Ignition System Check

• Inspect Spark Plugs:
  • Remove spark plugs using a socket.
  • Replace any worn or fouled plugs with OEM specifications.
• Check Ignition Coils:
  • Test the coils with a multimeter for proper resistance values as per the service manual.
  • Replace faulty coils.

5. Air Intake System Inspection

• Inspect for Leaks:
  • Check all hoses and connections for wear or cracks.
  • Replace any damaged hoses and ensure a tight fit.