Need help, boggs down when gas is pressed/random idle
 

1999 audi a4 b5 1.8t Quattro automatic transmission
Alright guys been awhile since I posted on this but still having problems, I changed the fuel filter out and it changed a lot but every once in awhile(anytime I stop and idle for more than 45 seconds-a minute and a half) it will idle funny at times (& has stalled occasionally) and also when I hit the gas it has major hesitation chugs and then drives like normal. went to a AutoZone the only code it threw was p0705 for a transmission sensor? I don't know a lot about fixing cars but that kind of makes sense because it almost seems like it trying to take off in 2nd or third gear (its a automatic) any ideas on what it is??

Any ideas???