why does my Ford Explorer 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

566 words

Problem Statement

Learn how to diagnose and fix rough starting issues in Ford Explorer during cold weather. 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 any components to prevent burns.

Symptoms

•Engine cranks longer than normal before starting
•Engine misfires or runs unevenly immediately after starting
•Increased exhaust smoke during cold start
•Check engine light illuminated
•Poor acceleration until the engine warms up

Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics (OBD-II) for any error codes.
2
Inspect the battery condition and charge level, ensuring it is fully charged.
3
Check the fuel system for proper pressure using a fuel pressure gauge.
4
Examine the spark plugs for wear or carbon buildup.
5
Test the ignition coils for proper operation.
6
Inspect the engine coolant temperature sensor for correct readings.

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

•Battery (if needed)
•Fuel filter (if needed)
•Spark plugs
•Ignition coils (if needed)
•Coolant temperature sensor (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics (OBD-II) for any error codes.
2
Inspect the battery condition and charge level, ensuring it is fully charged.
3
Check the fuel system for proper pressure using a fuel pressure gauge.
4
Examine the spark plugs for wear or carbon buildup.
5
Test the ignition coils for proper operation.
6
Inspect the engine coolant temperature sensor for correct readings.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety.
Allow the engine to cool completely before starting work.

2. Battery Inspection

Tools Required: Multimeter
Use a multimeter to check the battery voltage. It should read at least 12.6 volts.
If the battery is below this voltage, charge or replace the battery as necessary.

3. Fuel System Check

Tools Required: Fuel pressure gauge
Connect the fuel pressure gauge to the fuel rail.
Start the engine and check the fuel pressure. It should meet the specifications outlined in the service manual (typically between 30-50 psi for many models).
If the pressure is low, inspect the fuel filter and pump for blockages or failures.

4. Spark Plug and Ignition Coil Inspection

Tools Required: Socket set, torque wrench
Remove the spark plugs using the socket set and inspect them for wear or deposits.
Replace any worn or fouled spark plugs with OEM or equivalent parts.
Use the torque wrench to tighten the spark plugs to manufacturer specifications (usually around 13-15 lb-ft).
Test each ignition coil by removing it and checking for continuity; replace any faulty coils.

5. Coolant Temperature Sensor Replacement

Tools Required: Socket set, torque wrench
Locate the coolant temperature sensor, usually near the thermostat housing.
Disconnect the electrical connector and remove the sensor.
Install the new sensor and tighten it to manufacturer specifications (typically around 10-15 lb-ft).
Reconnect the electrical connector.