Quote:
Originally Posted by Tcoat
Pours more fuel in.
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No.
Actually cold start is leanish in this car, warm start too a little
And it's actually in open loop state when you first start it cold
If you measure AFR with a wideband with a stock tune, you ll see subaru afr stuck around 14.7/15.16 (it has various level undefined to me)
Meanwhile the wideband measures even slightly leaner
The pops are from stratified and retarded DI injection and negative ignition timing, combined with the timing retard induced by the throttle blipping, both pushing it and releasing it
There are also other OEM tables that limit the amount of retard while coolant is cold and while clutch is pressed (ever noticed sound changes when you press clutch to go in reverse during cold start?) and while it's complicated to see how and when those tables act, the burbles you get are mostly from retarded ignition timings