My MY99 is running like it's blown a turbo hose, just a bit more stuttery. I reckon it's the maf sensor but i'm not so sure aftre that thread. No bad noises so i don't assume i've done anything else. Idles fine, smokes and stutters on boost.

 

Can i check wastegate is closed on boost?
surely there'd be dab noises if i f***** the compressor side of the turbo???

Any help appreciated.

 

BTT someone must have a clue, please stick you're oar in even if you're not sure