why does my Ford Explorer Fifth Generation (2011-2019) have a hard start when cold

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

576 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 hard starting issues in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic procedures 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 systems.
•Allow the engine to cool before opening the coolant system.

Symptoms

•Difficulty starting the engine when cold
•Engine cranking but not starting immediately
•Engine stalling shortly after starting
•Rough idle upon initial startup
•Increased exhaust emissions during cold starts

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the battery voltage and condition to ensure it is not weak or failing.
3
Check fuel pressure using a fuel pressure gauge to confirm if the fuel pump is delivering adequate pressure.
4
Examine the spark plugs for wear, fouling, or incorrect gap settings.
5
Test the coolant temperature sensor for proper operation, ensuring it accurately reflects the engine temperature.
6
Inspect the fuel injectors for clogs or leaks that could affect fuel delivery.

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
•Multimeter
•Fuel pressure gauge
•Socket set
•Torque wrench

Parts Required

•Spark plugs
•Coolant temperature sensor
•Fuel injectors (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 the battery voltage and condition to ensure it is not weak or failing.
3
Check fuel pressure using a fuel pressure gauge to confirm if the fuel pump is delivering adequate pressure.
4
Examine the spark plugs for wear, fouling, or incorrect gap settings.
5
Test the coolant temperature sensor for proper operation, ensuring it accurately reflects the engine temperature.
6
Inspect the fuel injectors for clogs or leaks that could affect fuel delivery.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, fuel pressure gauge, socket set, torque wrench.
Ensure the vehicle is parked on a flat surface and the engine is off before starting.

2. Battery Inspection

Sub-steps:
1. Disconnect the negative battery cable.
2. Use a multimeter to check the battery voltage; it should read above 12.4 volts.
3. Clean the battery terminals and reconnect them securely.

3. Fuel System Check

Sub-steps:
1. Connect the fuel pressure gauge to the fuel rail.
2. Turn the ignition to the "on" position (without starting) to check the pressure; it should be within the manufacturer's specifications (typically around 55-65 psi).
3. If pressure is low, check for issues with the fuel pump, filter, or lines.

4. Spark Plug Inspection

Sub-steps:
1. Remove the spark plugs using a socket set.
2. Inspect each spark plug for signs of wear, fouling, or improper gap.
3. Replace with new spark plugs if necessary, ensuring the correct gap is set (usually around 0.028 to 0.060 inches).

5. Coolant Temperature Sensor Replacement

Sub-steps:
1. Locate the coolant temperature sensor on the engine.
2. Disconnect the electrical connector.
3. Remove the sensor using a socket set.
4. Install the new sensor and reconnect the electrical connector, ensuring it is secure.

6. Fuel Injector Cleaning/Replacement

Sub-steps:
1. Remove the fuel rail to access the injectors.
2. Use a fuel injector cleaning kit to clean the injectors (or replace them if damaged).
3. Reinstall the fuel rail and ensure all connections are secure.