higreen - I ended up swinging by a Indy who used to be a master tech/foreman for 2 local dealers. He has a 4.8 himself. What I described to him, before he got into the car, he asked me if it makes this ~huff huff~ noise, which was the exact noise I'm hearing when it sounds like it's running rough.

Anyhow, he jumped in, started the care and smiled and told me the problem I have is mine is like a virgin compared to his I was advised it's normal and his is like 10X louder.


I'll be driving the E53 this weekend to see if there is any change in behaviour with the spring weather -62H today, 42H tomorrow. Sofar, when I 1st observed the issue, it was there from both a cold start and hot. But it's not constant.