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Rpm jumps when coas...
 
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Rpm jumps when coasting

  

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Hi there. Ive got a 1.8tsi. From 08 

It's has a P0171 fault code, but accelerates ordinairy. 

Everytime i go to neutral and deccelerate while breaking, the rpm increases to 1500 and back down. This repeats until the car comes to a stop.

This also stops when i press the clutch. 

I have changed the MaF sensor and o2 sensor. Cause of p0171  And No help. 

What Can be Wrong here? 

 

 


2 Answers
1

vacuum leak in brake booster


Tnx ive thought about that, but can that be?
it's only happening when the wheels move


0

Check your IAC valve for connections and function.


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