Hi, I have a v/w polo 1.4 tdi 2005/6, my problem is that while I am driving this car at a certain speed the engine starts to accelerate on it's own, and becomes very dangerous, then I touch the pedal

SOURCE: Slow acceleration from stop and when driving (trying to pass)

I have the same car. So far no problems with the Transmision. I had the Trans oil change out every 60 K Sure sounds like you need to get the Transmision checked. Is the fault light on. I have invested ina fault code reader sure is worth it. 
Good luck.  Vilmos

SOURCE: car accelerating without touching gas pedal

Sounds like your TPS is receiving full resistance. If cable type check cable and the lever on the throttle body, if fly by wire then it may need a new TPS

SOURCE: Polo TDI smoking

If you are getting a continuous cloud of white smoke make sure to check your coolant level as your problem seems to be a possible head gasket issue.

Does this cloud have a sweet smell to it? Coolant has a distinct odor when it is burned.

Also check the oil. If the oil has a milky look to it on the dip stick you have a head gasket issue.

SOURCE: when i try to accelerate from a stop or from any speed my jimmy

Try replacing the Mass Air Flow Sensor, it is in line from the air filter box to the carb. Could have come unplugged or gone bad. They are not made to be cleaned or touched inside (that usually leads to damaging it). Good luck.

Testimonial: "Thanx for guiding me in the right direction. I ended up just unplugging 2 connectors from the air cleaner assembly."

omaromid

• 332 Answers
• Posted on Feb 11, 2010

SOURCE: Vw polo maintains engine revs when foot is off the accelerator.

You need to check the cable the runs from the gas pedal to the engine, it might be rusty and need some drops of penetrating oil at the point it meets with the engine accelerator valve.