Hey guys, purchased a b6 s4 6mt with 130k. Got it for a steal bc of misfire reasons. I owned a b5 s4 for 6 years so the 4.2 is new to me. Bank 1 ignition coil harness was very janky by the previous owner, but confirmed it was wired correctly with the wiring diagram. I am primarily getting misfires on cylinders 1 and 3 at idle. Here is what I’ve done so far:

-Played musical coil packs/changed plugs/ swapped and cleaned injectors to opposing banks.
-Gutted the upper and lower cats.
-re-tourqed intake manifold bolts
-cleaned maf

Again misfires only at idle, has the chain rattle on start up, the intake is the only thing that is prominently making noise when running. Hoping the photos from these Vcds blocks work. Any input is appreciated.


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