my Ford Explorer won't accelerate properly what's wrong

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

565 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 acceleration issues 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 the battery before working on electrical systems.
•Allow the engine to cool before performing any inspections.

Symptoms

•Check engine light illuminated
•Sluggish acceleration from a complete stop
•Engine stalling during acceleration
•Poor fuel economy
•Unusual engine noises during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Check the fuel system for proper pressure using a fuel pressure gauge.
3
Inspect the air intake system for blockages or leaks.
4
Examine the throttle position sensor (TPS) for proper function.
5
Verify that the transmission fluid is at the correct level and in good condition.
6
Inspect the spark plugs and ignition system for wear or failure.

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
•Fuel pressure gauge
•Screwdriver or socket set
•Multimeter
•Spark plug socket
•Torque wrench
•Funnel

Parts Required

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

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Check the fuel system for proper pressure using a fuel pressure gauge.
3
Inspect the air intake system for blockages or leaks.
4
Examine the throttle position sensor (TPS) for proper function.
5
Verify that the transmission fluid is at the correct level and in good condition.
6
Inspect the spark plugs and ignition system for wear or failure.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to ensure safety while working.

2. Check Fuel System

Fuel Pressure Test
- Connect a fuel pressure gauge to the fuel rail.
- Turn the ignition to the "ON" position without starting the engine to check pressure.
- Compare the reading to manufacturer specifications (typically 30-50 psi).
- If pressure is low, inspect fuel pump and filter for blockages or failure.
- Tools Required: Fuel pressure gauge.

3. Inspect Air Intake System

Remove Air Filter
- Open the air filter housing and inspect the filter for dirt and debris.
- Replace if necessary.
- Ensure the air intake ducts are free from obstructions.
- Tools Required: Screwdriver or socket set.

4. Test Throttle Position Sensor (TPS)

TPS Inspection
- Locate the TPS on the throttle body.
- Use a multimeter to check for proper voltage output at idle and full throttle.
- Replace the TPS if readings are outside specifications (typically 0.5-1.0 volts at idle and 4.5-5.0 volts at full throttle).
- Tools Required: Multimeter.

5. Check Transmission Fluid

Fluid Level and Condition
- Locate the transmission dipstick and check fluid level.
- If low, add the recommended type of transmission fluid (consult owner's manual).
- If fluid is dark or has a burnt smell, consider a transmission fluid change.
- Tools Required: Funnel, transmission fluid.

6. Inspect Ignition System

Spark Plug Check
- Remove spark plugs and inspect for wear or carbon build-up.
- Replace any faulty spark plugs with OEM or equivalent parts.
- Inspect ignition coils for proper function.
- Tools Required: Spark plug socket, torque wrench.