why does my Ford F-150's engine hesitate when I accelerate

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

601 words

Problem Statement

Learn how to diagnose and fix engine hesitation during acceleration in Ford F-150. 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 servicing to prevent burns.

Symptoms

•Engine stalling during acceleration
•Rough or uneven acceleration
•Poor fuel economy
•Check engine light illuminated
•Increased engine noise during acceleration

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 damage and replace if necessary.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Examine the throttle position sensor (TPS) for proper voltage and function.
5
Inspect the ignition system components, including spark plugs and ignition coils, for wear or damage.
6
Verify the condition of the mass air flow (MAF) sensor and clean it if dirty.

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
•Multimeter
•Socket set
•Torque wrench
•Screwdrivers

Parts Required

•Air filter
•Fuel pump (if needed)
•Throttle position sensor (if needed)
•Spark plugs
•Ignition coils (if needed)
•Mass air flow sensor cleaner

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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 damage and replace if necessary.
3
Check fuel pressure using a fuel pressure gauge to ensure the fuel pump is functioning properly.
4
Examine the throttle position sensor (TPS) for proper voltage and function.
5
Inspect the ignition system components, including spark plugs and ignition coils, for wear or damage.
6
Verify the condition of the mass air flow (MAF) sensor and clean it if dirty.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the battery to prevent electrical shorts.
Ensure the vehicle is on level ground and secure it with wheel chocks.

2. Replace Air Filter

Locate the air filter housing.
Open the housing and remove the old air filter.
Install a new air filter, ensuring it is seated properly.
Reassemble the housing and reconnect any clips.

3. Test and Replace Fuel Pump (if needed)

Connect the fuel pressure gauge to the fuel rail.
Turn the ignition to the "on" position to check for pressure readings.
If the pressure is below specifications, remove the fuel pump access panel.
Disconnect the fuel lines and electrical connectors.
Remove the old fuel pump and install the new one, ensuring all connections are secure.

4. Adjust or Replace Throttle Position Sensor

Locate the TPS on the throttle body.
Disconnect the electrical connector.
Use a multimeter to check the voltage output of the TPS at idle.
If the readings are outside specifications, remove the TPS and replace it with a new one.
Reconnect the electrical connector and ensure it is secure.

5. Inspect and Replace Ignition Components

Remove the spark plug wires or coils.
Inspect the spark plugs for wear; replace them if they are fouled or worn.
If ignition coils are suspected, test them with a multimeter; replace any defective coils.

6. Clean Mass Air Flow Sensor

Locate the MAF sensor in the intake duct.
Disconnect the electrical connector and remove the sensor.
Clean the sensor with MAF sensor cleaner; do not touch the sensing element.
Reinstall the MAF sensor and reconnect the electrical connector.