had it done for a week now, and its looks like one of my coil packs is packing up getting a miss fire whne its about too come on full boost. lucky for me i have two brand new ones spare, so will find out which one is on its last legs.
As for coil packs on a 2001!!! They will be doing very well if they are originals...Try cylinders 2 and 3 first or do some data logging if you have the ability.
Just make sure theres no boost leak as the same thing happened to mine and it was a loose hose connection to the intercooler which came loose. good luck s90gav
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