why does my Ford Explorer rev up but won't go

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

561 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 the rev up issue in Ford Explorer's transmission. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Transmission

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems
•Allow engine to cool before opening the transmission pan to prevent burns

Symptoms

•Engine revs without corresponding vehicle movement
•Possible slipping transmission
•Check engine light illuminated
•Unusual noises from the transmission
•Delayed or harsh shifting when engaging drive
•Poor acceleration response

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any diagnostic trouble codes (DTCs)
2
Inspect the transmission fluid level and condition, ensuring it is at the correct level and not burnt or contaminated
3
Check the throttle position sensor (TPS) for proper function and calibration
4
Inspect for vacuum leaks in the intake system that could affect throttle response
5
Test the transmission for proper engagement by checking the shift linkage and solenoids
6
Perform a road test to observe shifting patterns and any anomalies during acceleration

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
•Fluid pump
•10mm socket
•Drain pan
•Multimeter
•Basic socket set
•Smoke machine or carburetor cleaner

Parts Required

•Transmission filter (if applicable)
•Throttle position sensor (if faulty)
•Transmission fluid

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any diagnostic trouble codes (DTCs)
2
Inspect the transmission fluid level and condition, ensuring it is at the correct level and not burnt or contaminated
3
Check the throttle position sensor (TPS) for proper function and calibration
4
Inspect for vacuum leaks in the intake system that could affect throttle response
5
Test the transmission for proper engagement by checking the shift linkage and solenoids
6
Perform a road test to observe shifting patterns and any anomalies during acceleration

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
Disconnect the battery to ensure safety during repairs.

2. Check and Replace Transmission Fluid

Tools Required: Fluid pump, 10mm socket, drain pan.
Remove the transmission pan using a 10mm socket to access the fluid.
Drain the old fluid into a drain pan.
Inspect the transmission filter; if damaged, replace it.
Refill with the manufacturer-recommended transmission fluid.

3. Inspect and Replace Throttle Position Sensor (if faulty)

Tools Required: Multimeter, screwdriver set.
Disconnect the electrical connector from the throttle position sensor.
Use a multimeter to check the voltage output and ensure it meets specifications.
If out of range, remove the faulty sensor (usually secured with screws) and replace it with a new unit.
Reconnect the electrical connector.

4. Check for Vacuum Leaks

Tools Required: Smoke machine or carburetor cleaner.
Visually inspect hoses for cracks or disconnections.
Use a smoke machine or spray carburetor cleaner around joints and hoses while the engine is running to detect leaks.
Repair or replace any damaged hoses found.

5. Test Transmission Engagement

Tools Required: Basic socket set, possibly a scan tool.
Inspect the shift linkage for proper adjustment and integrity.
If issues are found, adjust or replace the linkage as necessary.
Test the solenoids using a scan tool to ensure they are functioning correctly.