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  1. Dean B
    Post

    Slow down cyl 7-12 is on with buzzing sound

    Both old O2 sensors are the same part number (Bosch 0258003009). Also, if you check O2 sensors at allferrariparts.com they are listed as 125881...
    Post by: Dean B, May 28, 2010 in forum: Boxers/TR/M
  2. Dean B
    Post

    Slow down cyl 7-12 is on with buzzing sound

    Problem is fixed and it was the oxygen sensor. I replaced both of them and there in no “slow down cyl 7-12” anymore. The original oxygen sensor is...
    Post by: Dean B, May 21, 2010 in forum: Boxers/TR/M
  3. Dean B
    Post

    Slow down cyl 7-12 is on with buzzing sound

    Number 1. Maybe this explanation can help little better. The light stays “on” continuously from initial start-up until car warm up. Cold car start...
    Post by: Dean B, May 17, 2010 in forum: Boxers/TR/M
  4. Dean B
    Post

    Slow down cyl 7-12 is on with buzzing sound

    ECU’s were swapped as well and no difference at all. Spark is there on both banks and when car warm up everything is fine, starts fine and all...
    Post by: Dean B, May 17, 2010 in forum: Boxers/TR/M
  5. Dean B
    Thread

    Slow down cyl 7-12 is on with buzzing sound

    I have a problem with 87 Testarossa and need help to fix it. When I start the car slow down cyl 7-12 is on with buzzing sound. When the car starts...
    Thread by: Dean B, May 17, 2010, 12 replies, in forum: Boxers/TR/M
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