I had mine in for a recall item last week, and I asked them to make a judgement on the pump. I see 12 at idle, 9 at cruising, and 4-5 at WOT. That looks to me to be a candidate for replacement. But, they say 10 or over at idle is the number. They're nice about it, but they don't see many diesels, so they just aren't that in tune with it. I thing BGDUMMY is right - you have to tell them it's not running right before they take action. I'll continue watching mine, but I'm convinced it's dying. I have a heck of a time getting it to fire after a filter change. I have to use a lot of pedal to get it to start back up.