HELP
My car was really lumpy on idle and was struggling to get good boost so i took it to scooby clinic they reset ecu and put new idle controller on and she go's like a dream.
BUT........after a week it idle's fine but when i drove around steady it feels like the car as like a pendalom affect or it feels like you are on and off the brahe pedal untill you put foot down after 3000rpm its fine and i have changed the following
1...maf sensor
2...panel filter to a HKS
3...fuel filter
4...idle controller
5...plugs ( 0.07 gap )
your help would stop me going to the funny farm

 

Lamda sensor?

It's the sensor that monitors off-boost, closed loop fueling, If I understand it correctly. If you car runs like poo off boost but is ok when the turbo kicks in, this would seem like a good bet.

I'm not an expert though!

Ns04

 

cheers pal

 

I had the same problem and changing the Lambada sensor sorted it out. MY00 UK spec. Do a search of "idling problems" and you will get lots of info.

Hope this helps.