Question about 2002 Volkswagen Golf
Try cleaning the throttle valve and the idle speed control valve. Use CRC brand spray throttle valve cleaner, about half the car will do it. Spray it into the engine intake while it running hold the idle up or it will stall out. After you have done this the idle problems should improve.
Posted on May 02, 2017
SOURCE: vw polo 1.4 tdi idle problem
Hey.. i just had this exact problem in my GTI and after 2 weeks of trial and error, I had to replace my Coolant Temp Sensor.. it was bad so it threw off the fuel metering valve which was part of the crazy idling problem.. I cant be 100% sure because our cars are not exactly the same but I mean we have the EXACT same symptoms so .. justa suggestion. Use the VAG-COM sensor reader and you'll be golden.
Posted on Mar 17, 2009
Most newer model cars have a computer program that will not allow a car to be revved up past a set rpm while in park or neutral to protect the engine from damage. If it runs fine during normal driving operations then it is best to leave it alone.
Posted on Apr 30, 2009
It may be a few different problems but try this first.Take the air filter out and try the engine, then.If its a lot different the filter may be clogged.This will cost zero but may give you an answer.Hope this helps. PS dont go driving around without the air filter as it will damage the motor
Posted on Dec 09, 2009
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