why does my Volkswagen Golf MK7 (2015-2019) engine rev high but doesn't accelerate?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench, and transmission fluid.
• Ensure the vehicle is parked on a level surface and the engine is off before starting work.

2. Transmission Fluid Inspection

• Sub-step 1: Locate the transmission dipstick (if equipped) and remove it.
• Sub-step 2: Wipe the dipstick clean, reinsert it, and check the fluid level. If low, add the appropriate transmission fluid.
• Sub-step 3: Examine the fluid on the dipstick for color and smell; if it is dark or burnt, plan to replace the fluid and filter.

3. Throttle Position Sensor Testing

• Sub-step 1: Disconnect the electrical connector from the throttle position sensor.
• Sub-step 2: Using a multimeter, measure the resistance across the sensor terminals while slowly moving the throttle.
• Sub-step 3: Compare readings to the manufacturer’s specifications; if out of range, replace the throttle position sensor.

4. Clutch or Torque Converter Check

• Sub-step 1: For manual transmissions, check the clutch pedal for proper engagement; if it feels loose, inspect the clutch assembly.
• Sub-step 2: For automatic transmissions, inspect the torque converter lock-up engagement by monitoring RPMs during road tests.
• Sub-step 3: If malfunctioning, replace the clutch or torque converter as necessary.

5. Drive Belts and Axles Inspection

• Sub-step 1: Visually inspect the drive belts for cracks or excessive wear; replace if needed.
• Sub-step 2: Check the axles for any signs of damage or looseness; replace damaged axles as required.