Good point.
CSV injecting too much fuel or not enough could be the problem.

I think the thermo-time switch only allows CSV injection up to a coolant temperature of 35C. If working, problem should go away once engine has run for a short period (maybe longer in the weather we have -11C at the moment!)

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Graham
85 300D,72 350SL, 98 E320, Outback 2.5