Ugh, my car doesn’t like something.
I went looking for loose heat shields etc: nothing.
Next step is exhaust leak test.
Or compare front A/F to wbo2.
So the IAM has dropped a little, its adding fuel and pulling timing at low/idle load.
Indeed idle is sounding a bit rough.
Warm idle, fuel learning very slowly rises by a point or two.
It just wants to run rich despite no inlet tract or pcv leaks.
Now the engine is high km and blows smoke on boost, drinks oil.
One theory is there’s so much blow-by it’s affecting afr.
The only test for that (it passes crankcase pressure testing) would be to install a catch can on the sump breather (and potentially the heads breathers) to see how much oil is collected.
Or put in a new turbo to see if that’s the source of the burning oil.
Here’s a colossal driving log:
https://www.dropbox.com/s/4zvtnpt82ef3k ... k.csv?dl=0This is a big cruise, it shows IAM crapping out and dropping to 1.00 to 0.5, then returning to 0.9.