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    Posted by Gary Done on February 23, 2007, 2:06 pm, in reply to "Re: 98 Volvo s40, 1800 petrol i think? conundrum !"

    Hi Tony .Ive just returned from a garage customer with a similar fault.Peu 406 est 02 marrelli system.Flat as a pancake when warmed up.Could have sworn it was blocked exhaust or valve timing.Removed oxy sensor to check pressure in exhaust system.No pressure but car runs fine.Refit sensor car runs flat again.Like yourself never seen such an effect from a bad oxy sensor.Gary

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