my Ford Explorer Fifth Generation (2011-2019) has poor acceleration what can be wrong

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

537 words

Problem Statement

Learn how to diagnose and fix poor acceleration issues in Ford Explorer 2011-2019. 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 components.
•Allow the engine to cool before servicing to avoid burns.

Symptoms

•Check engine light illuminated
•Engine stalling during acceleration
•Rough or inconsistent acceleration
•Unusual engine noises (e.g., knocking, pinging)
•Poor fuel economy
•Delay in throttle response

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the air filter for clogs or obstructions; replace if necessary.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Inspect the throttle body for dirt or carbon buildup; clean if required.
5
Examine the spark plugs for wear or fouling; replace if necessary.
6
Test the mass airflow sensor (MAF) using a multimeter to ensure it is reading correctly.

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
•Fuel pressure gauge
•Throttle body cleaner
•Multimeter

Parts Required

•New air filter
•New spark plugs
•Throttle body gasket (if needed)
•Fuel filter (if applicable)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the air filter for clogs or obstructions; replace if necessary.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Inspect the throttle body for dirt or carbon buildup; clean if required.
5
Examine the spark plugs for wear or fouling; replace if necessary.
6
Test the mass airflow sensor (MAF) using a multimeter to ensure it is reading correctly.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent any electrical short circuits.
Gather all necessary tools and parts.

2. Clean or Replace Air Filter

Remove the air filter housing cover using a socket set.
Take out the old air filter and inspect it; if dirty, replace it with a new one.
Reassemble the air filter housing cover securely.

3. Clean Throttle Body

Remove the throttle body from the intake manifold by loosening the mounting bolts.
Use throttle body cleaner and a soft brush to clean the throttle plate and interior surfaces.
Reinstall the throttle body and torque the bolts to the manufacturer's specifications.

4. Inspect and Replace Spark Plugs

Remove the ignition coil connectors and the coil packs from the spark plugs.
Use a socket wrench to remove the old spark plugs; inspect for signs of wear or fouling.
Install new spark plugs to the proper torque specifications (typically 13-15 ft-lbs).
Reconnect the ignition coils securely.

5. Check Fuel Pressure

Connect the fuel pressure gauge to the fuel rail's test port.
Turn the ignition to the "ON" position without starting the engine and check the pressure reading against specifications (typically 30-50 psi for the Explorer).
If pressure is low, inspect the fuel pump and fuel filter for clogs or failures.