I think what you are describing as "throttle tip-in" I have referred to as "throttle pumps," which is when you dump a bit of extra fuel in when the throttle is being opened rapidly. I don't think it is for wetting the cylinder (indeed that sounds like something which is undesirable) but rather because the air mass flow meter doesn't measure as quickly as the air starts moving, so you have to add in some fuel before the airflow meter is really telling you that it needs it. I might be wrong here, I am not an expert.

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2003 3.0 5MT Topasblau
Purchased in 2016 and sold in 2024
2012 35d Platingrau