why does my Ford Explorer Fifth Generation (2011-2019) have poor acceleration

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

545 words

Problem Statement

Learn how to diagnose and fix poor acceleration issues in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with symptoms and solutions.

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 inspecting or working on the engine components.

Symptoms

•Check engine light illuminated
•Noticeable lag during acceleration
•Engine stalling or misfiring
•Decreased fuel efficiency
•Unusual noises during acceleration
•Transmission slipping or harsh shifting

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check the air filter for clogs or restrictions that could affect airflow to the engine.
3
Inspect fuel system components, including fuel pressure and fuel filter condition.
4
Examine spark plugs and ignition coils for wear or failure.
5
Test the throttle position sensor (TPS) for proper function using a multimeter.
6
Inspect the transmission fluid level and condition, looking for signs of contamination or overheating.

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
•Torque wrench
•Multimeter
•Fuel pressure gauge
•Screwdrivers

Parts Required

•Air filter
•Spark plugs
•Fuel filter
•Throttle position sensor
•Transmission fluid

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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 air filter for clogs or restrictions that could affect airflow to the engine.
3
Inspect fuel system components, including fuel pressure and fuel filter condition.
4
Examine spark plugs and ignition coils for wear or failure.
5
Test the throttle position sensor (TPS) for proper function using a multimeter.
6
Inspect the transmission fluid level and condition, looking for signs of contamination or overheating.

Solution

1. Preparation

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

2. Replace Air Filter

Sub-steps:
1. Locate the air filter housing and remove the retaining clips or screws.
2. Remove the old air filter and inspect the housing for debris.
3. Install the new air filter, ensuring it fits snugly in place.
4. Reassemble the air filter housing and secure it with clips or screws.

3. Inspect and Replace Spark Plugs

Sub-steps:
1. Remove the ignition coil cover if applicable.
2. Disconnect the ignition coils from the spark plugs.
3. Use a spark plug socket to remove the old spark plugs.
4. Check the gap of the new spark plugs and adjust if necessary.
5. Install new spark plugs and reconnect ignition coils.
6. Replace the ignition coil cover.

4. Fuel System Inspection

Sub-steps:
1. Locate the fuel pressure test port on the fuel rail.
2. Connect a fuel pressure gauge and turn the ignition to the "ON" position (without starting the engine) to read fuel pressure.
3. If pressure is below specifications, replace the fuel filter and, if necessary, the fuel pump.
4. Recheck the fuel system for leaks after performing repairs.

5. Throttle Position Sensor Testing

Sub-steps:
1. Locate the throttle position sensor on the throttle body.
2. Disconnect the electrical connector and use a multimeter to measure voltage.
3. Compare readings to manufacturer specifications; replace the sensor if readings are out of range.
4. Reconnect the electrical connector and ensure connections are secure.

6. Transmission Fluid Check and Replacement

Sub-steps:
1. Check the transmission fluid level using the dipstick; add fluid if low.
2. If fluid is dirty or burnt, drain the transmission fluid using a pan and replace with new fluid as per manufacturer specifications.
3. Replace the transmission filter if applicable, and reassemble.

Tools Required:

OBD-II scanner
Socket set
Torque wrench
Multimeter
Fuel pressure gauge
Screwdrivers

Parts Required:

Air filter
Spark plugs
Fuel filter
Throttle position sensor
Transmission fluid

Estimated Repair Time: 2-4 hours

Safety Warnings:

Disconnect the battery before working on electrical systems.
Allow the engine to cool before inspecting or working on the engine components.