why does my Ford F-150 13th Generation (2015-2020) have a dead cylinder?

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

509 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 dead cylinder 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 working on any components near the engine block.

Symptoms

•Check engine light illuminated
•Rough idle or misfiring
•Loss of power during acceleration
•Increased exhaust emissions
•Poor fuel economy
•Engine stalling or hesitation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific cylinder misfire codes.
2
Perform a compression test on all cylinders to check for mechanical failures.
3
Inspect spark plugs for wear or fouling associated with the dead cylinder.
4
Check ignition coils for functionality and signs of damage.
5
Perform a fuel injector test to ensure proper operation and fuel delivery.
6
Inspect intake and exhaust valves for any obstructions or damage.

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
•Compression tester
•Spark plug socket
•Ratchet
•Torque wrench
•Screwdriver
•Fuel injector puller (if needed)

Parts Required

•Spark plugs
•Ignition coils
•Fuel injectors (if found faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific cylinder misfire codes.
2
Perform a compression test on all cylinders to check for mechanical failures.
3
Inspect spark plugs for wear or fouling associated with the dead cylinder.
4
Check ignition coils for functionality and signs of damage.
5
Perform a fuel injector test to ensure proper operation and fuel delivery.
6
Inspect intake and exhaust valves for any obstructions or damage.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the battery to ensure safety during repair.
Gather necessary safety equipment (gloves, goggles).

2. Remove Spark Plug and Ignition Coil

Sub-steps:
1. Locate the affected cylinder (identified during diagnostics).
2. Remove the ignition coil by unscrewing the retaining bolt and pulling it straight off.
3. Unscrew the spark plug using a spark plug socket and ratchet, and remove it from the cylinder head.
Tools Required: Spark plug socket, ratchet, torque wrench, screwdriver.

3. Inspect and Replace Components

Sub-steps:
1. Check the spark plug for wear; replace if fouled or damaged.
2. Inspect the ignition coil for cracks or signs of wear; replace if necessary.
3. If the fuel injector is faulty, remove it from the fuel rail and replace it with a new injector.
Tools Required: Fuel injector puller (if needed), torque wrench.

4. Reassemble and Reconnect

Sub-steps:
1. Install the new spark plug and torque it to the manufacturer’s specifications (typically 12-15 lb-ft).
2. Reinstall the ignition coil, ensuring it's seated properly and tighten the retaining bolt.
3. Reconnect the battery and clear any diagnostic codes using the OBD-II scanner.
Tools Required: Torque wrench.