Mint 2006 9-3 2.0T Low power / White smoke gas smell
Well I;ve searched the forums for over and hour and can't seem to pinpoint exactly what is going on and hope y'all can help me.. I just retired my 2007 9-3 with 219k... it had some brake issues and bad coil packs.. So I know what the coil pack stutter feels like and this isn't it.. This is the 2.0T not 2.0t btw... has 140k is 5 speed and is very very very clean.. one owner... he last year replaced coil packs.. rear struts and rear calipers/rotors/pads...very well maintained saab, ive been super enjoying it for the last 2-3 weeks.. then.. today... I press the gas like usual at my favorite spot... waiting for the surge feeling... nothing came, turbo gauge went about.. half way up. usually goes to near red and has a nice pull.... No check engine no nothing... Then, i pull into store.. the car is off literally 1min.. get back in... seems running fine again, rip first.. ALL THE BOOST.. even triggers ESP... rip second.... okay at first then starts running like crap not al on cylinders, flashing check engine light, just while i was rolling manually turn key off then pop start in third.... Running fine again, But again... no power... I checked for shaft play on turbo.. it feels way better than my 2007 with almost 100k more miles..front and back.... .This is odd.. (this happened once before 2 weeks earlier. the low to no power..had a check engine but on my way to my buddies shop, the check engine went off and ran perfect again).. Was wondering if you guys had some starter things to look for.. my saab expert friend.. whos out of town for a few days, thinks possible ecu, But directed me here...I know the coil packs are good... Any suggestions? The last incident which just happened.. i was able to maintain a check engine light.. But... no scanner till i can get to my buddies.. and I have to drive it for work... so idk if it will stay on.... And finally.. if I drive it.. just regular, no beating on it... but casually boosting out of corners... it usually runs fine... once in awhile will have low boost/power issue but always goes away, never a check engine light...
thank you for all your help in advance.