Finally ready for some garage time. Winter has arrived

Had to drive it home, after an alignment, on summer tires, in this;

Scary!
Havenīt really done anything to the car as it runs fine after warm-up. What Iīve learned; Had fuel pressures checked, warm and cold is ok. I have a new fuel pump and accumulator. CSV is OK, wur has power. I DO have one or more air leaks. At least at one or more of the injectors. (Ordered new seals and sleves) No change to idle when removing oil-tank lid.
Problem has been getting worse as the weather has become colder. Starts ok, but wont hold idle unless i feather the throttle. Lately its been running rough until warm, sometimes not on all cylinders. Backfires more. But stil fine when warm.
Could my problems be caused by air-leaks alone?