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Originally Posted by Steamfitter
...Trooper I don't have the physical manual-it is on CD so I don't know the page #'s but my setback there was that I do not have a tech2 scanner which Isuzu relies on for all diagnostics....
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okay, but i'm looking at a pdf version and it ought to be on your cd. it's a 3-pager. p1 has a nice schematic to show you *all* the components of the system. pp2-3 has a 15-point step-by-step diagnostic that only relies on the TECH2 for one of those steps. i think it would help you. it's in the Driveability and Emissions Section, of course.
Evaporative (EVAP) Emissions Canister Purge Valve Check
good luck.
//bc