my Toyota Highlander Third Generation (2014-2019) drives rough and shakes when accelerating what cou...

Toyota Highlander Third Generation (2014-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

539 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 rough driving and shaking during acceleration in Toyota Highlander 2014-2019. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Ensure the vehicle is on a level surface and secured before working underneath.

Symptoms

•Rough idle when the vehicle is stationary
•Noticeable shaking or vibrations during acceleration
•Loss of power or sluggish acceleration
•Increased engine noise or knocking sounds
•Possible check engine light illuminated
•Poor fuel economy

Diagnostic Steps

1
Scan the vehicle's onboard computer with an OBD-II scanner for any stored error codes.
2
Inspect the engine mounts visually for signs of wear or damage.
3
Check the condition of the spark plugs and ignition coils for misfiring.
4
Examine the fuel system, including fuel pressure and fuel filter condition.
5
Inspect the drivetrain components, including CV joints and driveshaft for wear or damage.
6
Test the transmission fluid level and condition.

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
•Fluid pump
•Spark plug socket

Parts Required

•Spark plugs
•Ignition coils (if misfiring is detected)
•Engine mounts
•CV joints or driveshaft (if damaged)
•Transmission fluid

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle's onboard computer with an OBD-II scanner for any stored error codes.
2
Inspect the engine mounts visually for signs of wear or damage.
3
Check the condition of the spark plugs and ignition coils for misfiring.
4
Examine the fuel system, including fuel pressure and fuel filter condition.
5
Inspect the drivetrain components, including CV joints and driveshaft for wear or damage.
6
Test the transmission fluid level and condition.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the vehicle battery to ensure safety while performing repairs.

2. Inspect and Replace Spark Plugs

Remove the engine cover if necessary using a socket set.
Disconnect ignition coils from each spark plug.
Use a spark plug socket to remove old spark plugs.
Inspect the spark plugs for wear and replace with new ones as needed (Torque to manufacturer's specification).

3. Check and Replace Engine Mounts

Locate engine mounts and inspect for cracks or deterioration.
Use a socket set to remove the bolts securing the engine mounts.
Replace with new engine mounts, ensuring they are properly aligned (Torque to manufacturer's specification).

4. Examine and Repair Drivetrain Components

Inspect CV joints and driveshaft for any visible damage or wear.
If damaged, remove the affected CV joint or driveshaft using appropriate tools.
Replace with new components as required (Torque all bolts to manufacturer's specification).

5. Transmission Fluid Check and Replacement

Locate the transmission fluid dipstick and check the fluid level and condition.
If fluid is low or dirty, drain the old fluid using a fluid pump and replace it with new fluid (Use manufacturer-recommended transmission fluid).
Refill to the correct level and check for leaks.