why does my Ford Explorer Fifth Generation (2011-2019) have a rough start in cold weather?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

575 words

Problem Statement

Learn how to diagnose and fix rough starting issues in cold weather for Ford Explorer (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 hood or working on the cooling system.

Symptoms

•Engine cranks longer than usual before starting
•Rough idle immediately after starting
•Engine stalling shortly after starting
•Increased exhaust smoke during startup
•Illuminated check engine light

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check the battery voltage and connections for corrosion or looseness.
3
Inspect the spark plugs for wear or fouling, and ensure proper gap.
4
Test the fuel pressure to ensure the fuel pump is delivering adequate pressure.
5
Check the engine coolant temperature sensor for proper operation.
6
Inspect the air intake system for blockages or leaks.

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
•Socket set
•Fuel pressure gauge
•Spark plug gap tool

Parts Required

•Battery (if replacement needed)
•Spark plugs (if worn)
•Fuel filter (if needed)
•Engine coolant temperature sensor (if faulty)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check the battery voltage and connections for corrosion or looseness.
3
Inspect the spark plugs for wear or fouling, and ensure proper gap.
4
Test the fuel pressure to ensure the fuel pump is delivering adequate pressure.
5
Check the engine coolant temperature sensor for proper operation.
6
Inspect the air intake system for blockages or leaks.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is on a level surface and the engine is cool.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Inspection and Replacement

Tools Required: Multimeter, socket set
Sub-steps:
1. Use a multimeter to check the battery voltage; it should be above 12.4 volts.
2. If the voltage is low, consider charging or replacing the battery.
3. Clean battery terminals and cable connections if corrosion is present.

3. Spark Plug Inspection and Replacement

Tools Required: Socket set, spark plug gap tool
Sub-steps:
1. Remove the ignition coil covers (if applicable) to access the spark plugs.
2. Unscrew and remove the spark plugs.
3. Inspect each spark plug for signs of wear or fouling; replace if necessary.
4. Check and adjust the spark plug gap according to manufacturer specifications.
5. Reinstall the spark plugs and ignition coils.

4. Fuel System Examination

Tools Required: Fuel pressure gauge
Sub-steps:
1. Locate the fuel rail and connect the fuel pressure gauge.
2. Turn the ignition to the "on" position (do not start) and check the fuel pressure.
3. If pressure is below specifications, consider replacing the fuel pump or filter.
4. Inspect fuel lines for leaks or blockages.

5. Engine Coolant Temperature Sensor Check

Tools Required: Multimeter
Sub-steps:
1. Locate the engine coolant temperature sensor (ECT) on the engine block.
2. Disconnect the sensor connector and measure the resistance with a multimeter.
3. Compare the resistance value with the manufacturer's specifications.
4. Replace the ECT if it is out of range.