I am hoping to get some diagnosis help asto what is going on w/my '02 a4 1.8t.Whenthe car is accelerating and hits 1900rpm there is a very noticeable shutter and hesitation. If I accelerate quickly and don't let the rpm gauge linger around 1900 rpm then you don't notice any hesitation at all, but the slower I accelerate the more noticeable it is. Also when traveling at a constant speed that is around 1900 rpm I can see the rpm gaugespike back and forth between 2000 and 1900 rpm.
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Is your car chipped?

 

nope

 

what does it idle at ??

 

it idles at 950, smooth