What now!
After a couple of hours of stop and go errand driving in 85 plus degree heat...I pull into the driveway and the normally smooth running m54 engine starts to shake and quiver backfire

Raised the bonnet...No burning smells, couldn't see anything from the OFHG area...no smoke, didn't bother to investigate more.
Had a good 2 months run of no problems I guess.
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