can anyone help, i have got a 99 turbo overfueling problem. i have changed the mafs sensor then it went to cheam motors for 4 weeks, they changed all the other sensors to test then took them back off, they also did a full engine test, compression and cylinder balance. they then adjusted the tappets?. didnt work...they also put a new fuel regulator on, again didnt work. cold start is okish then slowly gets worse, idle down to nothing and loads of black smoke, i am looking for help and ideas before i go down the route of a new ecu... technician said injector time is 0.6 millisecs which is large he said, so is ecu working and getting a wrong signal?????. no fault codes in system...cheers. any help appreciated..

 

Got an aftermarket dump vlalve?

 

no dump valve standard, sti intercooler. hks induction pipe and filter. full decat exhaust and up pipe.