how to fix Ford F-150 13th Generation (2015-2020) rough running engine

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

575 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 a rough running engine in Ford F-150 13th Generation (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 the ignition system or fuel system.
•Allow the engine to cool before performing any inspections on the engine components.

Symptoms

•Rough idle when the engine is at a standstill
•Loss of power during acceleration
•Engine misfire or hesitation
•Check engine light illuminated
•Poor fuel economy
•Increased exhaust emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect spark plugs and ignition coils for wear or damage.
3
Check fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.
4
Inspect air intake system for any vacuum leaks or obstructions.
5
Evaluate the condition of the fuel injectors for clogs or malfunction.
6
Verify the condition of the engine oil and filter.

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
•Spark plug socket
•Fuel pressure gauge
•Smoke machine or carburetor cleaner

Parts Required

•Spark plugs
•Ignition coils (if necessary)
•Fuel filter
•Fuel injectors (if necessary)
•Vacuum hoses and gaskets (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect spark plugs and ignition coils for wear or damage.
3
Check fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.
4
Inspect air intake system for any vacuum leaks or obstructions.
5
Evaluate the condition of the fuel injectors for clogs or malfunction.
6
Verify the condition of the engine oil and filter.

Solution

1. Preparation

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

2. Inspect and Replace Spark Plugs

Tools Required: Socket set, torque wrench, spark plug socket
Remove the ignition coil on each cylinder to access the spark plugs.
Use a spark plug socket to remove each spark plug.
Inspect the condition; if fouled or worn, replace with OEM recommended spark plugs.
Torque new spark plugs to manufacturer specifications (typically around 13-15 lb-ft).
Reinstall ignition coils.

3. Check and Replace Ignition Coils (if necessary)

If misfires are detected for specific cylinders, remove the ignition coils for those cylinders.
Inspect for cracks or damage; replace faulty coils with OEM parts.
Reassemble and reconnect the ignition coils.

4. Fuel System Inspection

Tools Required: Fuel pressure gauge
Connect the fuel pressure gauge to the fuel rail.
Start the engine and monitor fuel pressure; it should meet specifications (typically around 55-65 psi).
If pressure is low, check fuel filter and replace if clogged.
Inspect the fuel pump for proper operation and replace if necessary.

5. Vacuum Leak Inspection

Using a smoke machine or carburetor cleaner, inspect hoses and intake manifold for vacuum leaks.
Replace any damaged hoses or gaskets found during the inspection.

6. Fuel Injector Cleaning/Replacement

If injectors are suspected to be clogged, use an injector cleaning kit to clean them. Alternatively, replace with new OEM injectors if necessary.