Same on mine, Cleaned maf sensor vac pipes TBody and air intake system etc.(now a monthly job as i have found modded air box and filter klags up your intake system quicker!)
Much better then Changed, MK3 poop ecu and fuel pump relays and for morning stalling cleaned isv. Also new fuel filter, cleaned Lambda probe.
Car runs a dream and pulls all the way up to 6k

isv needs a clean this weekend as did not start first time earlier this week last time i cleaned it was May