Turbo related question

[perrya]

I have a 2002 VW jetta 1.8T, after the car sits overnight or long period of time and engine cold, it takes 10 minutes of idle to warm the engine before driving to avoid some jerking. if the engine is warm or hot, there is no issues with the car. I suspect that the turbo requires some heating up before driving. Does the turbo need to warmed up when the engine is cold? is the turbo running in idle? This issue seems to be a heat related issue with the engine. There seems to be lag between the time you accelerate and the turbo, feels like the car is in neutral for a split second. Does the ECM need to re-calibrated? There are no codes.

 

[keaton85]

Turbo does not need time to heat up..

 

[wonneber]

Do you have power brakes when the car is cold?
Thinking about a vacuum problem.
Not sure if the BRM needs vacuum for the turbo.
Maybe scan & log the boost pressure while cold.
Log requested & actual with the coolant temp to see if it starts at a certain engine temp.
The temp sensor is a dual sensor, one for the ECM, one for the gauge.

Rich W.