That's interesting about your spongy throttle response. I've driven several 4.4l and 3.0l over the past week before I settled on a 4.4l with mushy or lagging throttle. The other ones I drove were responsive has heck, no lag. I almost bought the 3.0 over the 4.4 because of that but I'm thinking it's vacuum related and I can fix it. Plus the thing is mint. I'm sure I'll have it sorted out soon. Just add it to the list.

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Patience is a virtue. I have neither.

2002 X5 4.4