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Rough running & flashing Check Engine light V70-XC70 1999

posted by  someone claiming to be Peter on  Wed Jul 19 17:57 CST 2006 [RELATED]

Car suddenly began running terrible and the Check Engine light flashes. Code reader showed P1171 (Fuel trim exceeds upper limit) and P0300 (misfire on multiple cylinders). Checked fuel pressure and it is fine. Cleared codes & drove car. P0304 code (misfire on #4 cylinder) came up immediately. Replaced MAF sensor. No effect.

Any ideas or suggestions?






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