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coils plugs are new

  1. P0340 car only half boost

    9-3 Sedan, Cabrio '04+, Combi, 9-3X Workshop
    Hi everyone, new guy here. I saw a couple threads on this but I couldn't find what the actual fix was. 2003 9-3 arc 6mt. Car was missing under full boost/load so I changed the spark plugs and two coils, the car sat with the key in it and the battery died. I installed new battery and replaced...
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