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lt1 problems

  1. LT1 | LT4 | L99 Engine Tech
    I’ve had it, today at crew car wash my $500 MSD Optispark went out for the third time in the last year and a half. Error code for low and high res showed up. I’m not doing this anymore , what alternatives are there to Optispark that actually work other than the method of using the optical sensor...
  2. New User Introductions
    I have just purchased a car. A 1994 t/a. I have been told that it has been stored, upgraded cam, rear gears have been changed (don't know what gears were put in), headers, and it still has an opti spark system. No changes so far.
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