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Re: 04 Impala 3.8L EVAP DTC
Posted to Technical Tips Forum on 6/18/2007

with the Vent valve port capped , the system decided to open the purge valve at exactly the correct time and i captured this , the fix was a Evap Vent Valve

AE 5.1 graph / log of Evap Purge with Vent valve port capped DTC P0455 Evaporative Emission Control S... Login to read more.

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