Bought this mini a week ago. 117K . No boost at first . Reduced power half yellow engine light plus P 1497 codes . Found a cracked valve cover . Replaced the valve cover . Found pcv line cracked in many places . Fixed pcv line. Ran a smoke test and the only thing that smoked a little was the boost solenoid. Tied the 2 vacuum lines together and I had boost for the first time but seems like the wastegate would open up and dump randomly. Replaced boost solenoid and put lines back and no boost . Getting the p1497 code and a P0420 code . I also put on a new diverter valve today also. HELP APPRECIATED !!!

 

Are you sure the smoke was coming from the solenoid? There's a plastic tank in the same area, and if it leaks you could have the same problem. Also, double check the vacuum hoses --- they soften easily.

 

The factory solenoid had a metal ring that looked to be crimped and the smoke was coming from there. Just trying to figure out why the computer isn’t telling the solenoid to open up . When I bypass that solenoid the turbo works . New solenoid didn’t fix the problem. Keep getting a catalytic converter code so trying that next