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Service engine soon light?

This is a discussion on Service engine soon light? within the External Engine forums, part of the LSx Technical Help Section category; I just recently installed long tube headers and y-pipe on my car. And now the service engine soon light is ...

  1. #1
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    1998 Trans Am Ws6

    Service engine soon light?

    I just recently installed long tube headers and y-pipe on my car. And now the service engine soon light is on. Is this common??

  2. #2
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    Yes, especially if you deleted the cats - did you keep the AIR and EGR? Get the codes read free at some place like auto zone and post them.

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    Member jmhvenom's Avatar
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    did you get O2 sims? Did you put the O2 extensions in? Tune it at all? Pretty easy one to fix... probably forgot a combination of these...

  4. #4
    Junior Member tsench's Avatar
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    tune it out about 50 bucks

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