why does my Ford Explorer hesitate when I accelerate from a stop

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

493 words

Problem Statement

Learn how to diagnose and fix acceleration hesitation in Ford Explorer. 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 battery before working on electrical systems.
•Allow engine to cool before opening any components.

Symptoms

•Engine hesitates or stutters when accelerating
•Check engine light illuminated
•Poor fuel economy
•Engine RPMs increase slowly
•Possible vibrations or shaking during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the engine or transmission.
2
Inspect the air filter for clogs or dirt that could restrict airflow.
3
Check fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
4
Examine ignition components, including spark plugs and ignition coils, for wear or damage.
5
Verify the throttle position sensor (TPS) functionality with a multimeter.
6
Inspect transmission fluid levels and quality to rule out transmission-related issues.

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
•Fuel pressure gauge
•Multimeter
•Torque wrench
•Spark plug socket

Parts Required

•Fuel filter
•Spark plugs
•Throttle position sensor (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the engine or transmission.
2
Inspect the air filter for clogs or dirt that could restrict airflow.
3
Check fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
4
Examine ignition components, including spark plugs and ignition coils, for wear or damage.
5
Verify the throttle position sensor (TPS) functionality with a multimeter.
6
Inspect transmission fluid levels and quality to rule out transmission-related issues.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Allow the engine to cool if it has been running.

2. Replace Fuel Filter

Locate the fuel filter (refer to owner’s manual for specific location).
Use a socket set to remove any retaining bolts.
Disconnect fuel lines carefully to avoid fuel spillage.
Install the new fuel filter, ensuring flow direction matches the original.
Reconnect the fuel lines securely and reattach the retaining bolts.

3. Inspect and Replace Spark Plugs

Remove ignition coil covers if applicable.
Unscrew spark plugs using a spark plug socket and ratchet.
Inspect old spark plugs for wear or carbon buildup.
Gap new spark plugs to manufacturer specifications.
Install new spark plugs and torque to the manufacturer’s specified value (usually around 13-15 lb-ft).
Reinstall ignition coils or covers.

4. Throttle Position Sensor Check

Disconnect the TPS connector.
Use a multimeter to measure resistance across the TPS terminals.
Compare readings with manufacturer specifications.
If outside specifications, replace the TPS with a new unit.
Reconnect the TPS connector.