If the EVAP stuff starts going bad, it could basically act like a constant vacuum leak. Maybe try plugging off the EVAP hose. But it could be time for new O2 sensors as well. Do you know if there was any type of custom tune installed?
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
Last edited by JL8Jeff; 12-24-2011 at 08:46 AM.
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