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'99 tahoa 350, spark will not advance beyond 20 degree's

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  • LNNKELLEY Sep 11, 2008

    When I start the truck it misses a little and when you put it in gear it will die. I have had it in the shop and the mechanic said the timming advance is not working and that it was in the wirring. I have been through the wirring and can not find the problem.

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The spark should not be more than 12 degrees before TDC. In your model the timing can not be advance through manual means. it has to be done with a diagnostic scan equipment, this requires an ASE certified mechanic. can you be a little more specific as to the nature of why you feel that timing is an issue?

Posted on Sep 11, 2008

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