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No knocking from bottom end. had spark plugs changed and oil and filter done. The codes i've got point to valve timing:(!! That means engine and box out! It misfires randomly and is down on power obviously. secondary air flap is noisey, possibly due to it backfiring a bit.:shrug:

About 6 months.

Hi all, i've got a 53 plate 4.2 S4, BBK engine code, it's misfiring like hell. Have had a scanner on it and keeps coming up with codes as follows, 17755 Bank 2 camshaft/crank angle sensor wrong combination of ecu's p1347 17748 camshaft/crank angle sensor wrong combination of ecu's p1340. These...