So I was driving down the motorway (80km) after a 5 minute drive, put my foot down to pass and all of a sudden my engine starts shuddering badly. Boost never went over primary level (around 8psi)
Backed down to 80km/h and could really feel the shuddering in 5th, less in 4th, none in 3rd.
Parked back at work, car isn't sounding the same (Engine sounds louder?). Open bonnet and see smoke from the passenger's side coming from under the top mount and engine is vibrating a LOT. (Whole car is shaking in idle)
This is a 2002 BE5D Legacy. Oil was done about 1200 K's ago from Crowesport (I always do it myself, have for the last 3 years, except this once)
Any idea what this could be?
No codes came up.
Edit: Shaking would mean a cylinder is not firing from memory, but the smoke?
Edit again: I always use 98, factory Denso tune