why does my Ford F-150 13th Generation (2015-2020) check engine light flash when accelerating

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

570 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix engine misfire issues in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before performing any maintenance tasks.

Symptoms

•Check engine light flashing
•Engine misfire or rough running
•Decreased acceleration performance
•Poor fuel economy
•Possible vibration during acceleration
•Engine stalling intermittently

Diagnostic Steps

1
Scan for diagnostic trouble codes (DTCs) using an OBD-II scanner to identify specific issues.
2
Inspect ignition components such as spark plugs, ignition coils, and wiring for signs of wear or damage.
3
Check fuel system pressures to ensure proper fuel delivery to the engine.
4
Examine the air intake system for blockages or leaks, particularly in the mass airflow sensor (MAF) and throttle body.
5
Inspect exhaust system for restrictions or leaks that could affect engine performance.
6
Test for vacuum leaks using a smoke machine or carburetor cleaner.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Torque wrench
•Pliers
•Fuel pressure gauge
•Throttle body cleaner
•Soft cloth
•Flashlight

Parts Required

•Spark plugs
•Ignition coils
•Fuel filter (if applicable)
•Throttle body gasket

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Diagnostic Steps

1
Scan for diagnostic trouble codes (DTCs) using an OBD-II scanner to identify specific issues.
2
Inspect ignition components such as spark plugs, ignition coils, and wiring for signs of wear or damage.
3
Check fuel system pressures to ensure proper fuel delivery to the engine.
4
Examine the air intake system for blockages or leaks, particularly in the mass airflow sensor (MAF) and throttle body.
5
Inspect exhaust system for restrictions or leaks that could affect engine performance.
6
Test for vacuum leaks using a smoke machine or carburetor cleaner.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Ignition Components

Tools Required: Socket set, torque wrench, pliers
Identify and replace any faulty spark plugs or ignition coils based on diagnostic codes.
- Remove the engine cover if applicable.
- Disconnect the ignition coil connectors and remove bolts.
- Pull out the ignition coils and replace spark plugs if necessary.
- Torque new spark plugs to manufacturer specifications (typically 12-15 lb-ft).
- Reinstall ignition coils, ensuring connectors are secure.

3. Inspect Fuel System

Tools Required: Fuel pressure gauge
Check fuel pressure at the fuel rail to confirm it meets specifications (typically 30-65 psi).
- If pressure is low, check the fuel pump and filter for obstructions.
- Replace the fuel filter if it hasn’t been changed in a while.

4. Clean Air Intake System

Tools Required: Throttle body cleaner, soft cloth
Remove the throttle body and clean it thoroughly.
- Spray throttle body cleaner into the throttle body while opening it manually.
- Wipe away carbon deposits with a soft cloth.
- Reinstall the throttle body with new gaskets if necessary.

5. Examine Exhaust System

Tools Required: Socket set, flashlight
Inspect the exhaust system for any blockages or leaks, particularly near the catalytic converter.
- Look for cracks or holes in the exhaust pipes.
- Replace any damaged sections or components.