[ryansbmw]

Last weekend, I cleaned the MAF sensor and replaced the TMAP sensor with a 3.5bar from the N20- no change.

So I dropped the car off at the shop on Monday afternoon to have this rough idle issue looked at a bit more and also fix a squealing belt and pulleys. Sure enough, they didnt witness the rough idle once in the 3 days they had the car. They checked for air leaks and nothing. No codes anywhere (not a surprise). Ill need to ask them if they did the VANOS and valvetronic motor test on ISTA or not when I pick up the car.

Is it possible the belts and pulley caused all of this? They said the belt was stretched and the pulleys had some play. It had been chirping when the engine was cold but would eventually go away. Would that be enough to cause this issue?