why does my Ford Explorer Fifth Generation (2011-2019) rev high but doesn't accelerate

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

562 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 to diagnose and fix high RPMs with no acceleration in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostics, and solutions.

Affected Component

Transmission

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 the transmission.

Symptoms

•High engine RPMs when accelerating
•Lack of forward motion despite engine revving
•Possible slipping sensation when accelerating
•Engine noise increases with RPM but no speed increase
•Check engine light may be illuminated

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; low or contaminated fluid can cause issues.
3
Inspect the throttle body for carbon buildup or malfunction.
4
Examine the vacuum lines for leaks that may affect engine performance.
5
Test the throttle position sensor (TPS) with a multimeter to ensure it is functioning correctly.
6
Inspect the transmission for any visible leaks or damage, especially around seals and gaskets.

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
•Transmission fluid pump
•Fluid catch pan
•Throttle body cleaner
•Multimeter

Parts Required

•Transmission fluid (Mercon LV)
•Throttle position sensor (if replacement is needed)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any transmission-related trouble codes.
2
Check the transmission fluid level and condition; low or contaminated fluid can cause issues.
3
Inspect the throttle body for carbon buildup or malfunction.
4
Examine the vacuum lines for leaks that may affect engine performance.
5
Test the throttle position sensor (TPS) with a multimeter to ensure it is functioning correctly.
6
Inspect the transmission for any visible leaks or damage, especially around seals and gaskets.

Solution

1. Preparation

Gather all necessary tools and parts.
Park the vehicle on a level surface and set the parking brake.
Disconnect the battery to ensure safety while working on electrical components.

2. Check and Replace Transmission Fluid

Sub-steps:
1. Locate the transmission dipstick (if applicable) or remove the transmission pan if it does not have a dipstick.
2. Remove the dipstick or pan and inspect the fluid. The fluid should be bright red and clear.
3. If the fluid is dark or has a burnt smell, it needs to be replaced.
4. If necessary, drain the old fluid completely and replace it with new fluid per manufacturer specifications (typically Mercon LV for Ford vehicles).
5. Reinstall the dipstick or transmission pan, ensuring all bolts are torqued to the manufacturer's specifications.

Tools Required:

OBD-II scanner
Socket set
Torque wrench
Transmission fluid pump
Fluid catch pan

3. Inspect and Clean the Throttle Body

Sub-steps:
1. Remove the air intake duct to access the throttle body.
2. Use throttle body cleaner and a soft cloth to clean the throttle plate and surrounding area.
3. Reassemble the air intake duct securely.

4. Test and Replace the Throttle Position Sensor (if necessary)

Sub-steps:
1. Disconnect the electrical connector from the TPS.
2. Use a multimeter to check the resistance across the sensor terminals while slowly moving the throttle.
3. If the readings are inconsistent or out of specification, replace the TPS with a new one.
4. Reconnect the electrical connector and clear any codes from the OBD-II scanner.