Verified no exhaust leaks.

When monitoring O2 sensors, upstream fluctuate from 2.7-3.4 volts and change according to vacuum leak or added fuel (brake clean through vacuum hose). Rear O2's seem fixed at 3.3 on bank 1 and 2.8 volts on bank 2 and don't fluctuate...

FIX posted 6/19/2017

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