I have a 2000 2.7t (tiptronic) and recently my car seems to pause or be sluggish between 1st and 3rd, I changed my oil and added some fuel injector cleaner.

I'm not getting any codes relating to engine problems, I do have a rosstech vag-com and do run it every other day to see if anything new pops up. I do have to change my b1s1 o2 sensor and i think my secondary air injection pump is donezo.

Also when i come to a stop, like 1 out of every 4 stops my rpms drop below normal bumpin the car forward and then quickly catching itself.

Any ideas? Maybe I have a vacuum leak somewhere?

 

When the rpms dip it means the engine isn't providing enough power to stabilize itself. If you have a bad 02 I would say replace that.