- Check Engine warning light showing on dashboard.
- Engine is running rough.
- Engine is rough at idle speed.
- Gear changes are difficult.
- Engine doesn’t start up and/or cuts out when running.
- Car acceleration or performance is not as strong as normal.
What are the Signs of a Bad Throttle Body?
- Stalling. The car’s primary computer, which is often referred to as the powertrain control module (PCM), expects to see a certain amount of airflow through the throttle body
- Unstable idle
- Rough running
- Illuminated engine light
- Reduced power warning message on the dash
How do you reset the throttle body on a VW Polo?With the car off, push the accelerator all the way to the floor. Then turn your key to the ‘on’ position (do NOT start the car) and wait at least 10 seconds. Release the accelerator, then take the key out.
Why does a throttle body fail?Filth, carbon, and dirt can build up in the housing creating problems with air flow. Known as coking, the normally smooth service for air to travel becomes full of gunk and creates an imbalance. This interrupts that perfect mixture of air and fuel which can cause the butterfly valve to get stuck.
While throttle–body cleaning is good preventative car maintenance, it should also help engine drivability. In fact, if you’ve noticed a rough idle, stumbling initial acceleration or even stalling – all when the engine is fully warmed up – a dirty throttle body could be the culprit.
To replace your car’s throttle body, you will pay as little as $370 or as much as $1,500. Labor should be between $70 and $260, and parts should cost you from $110 to $600
How long should a throttle body last?about 75,000 milesWhile there is no set mileage when it comes to the lifespan of the throttle body, it is suggested that you giv