Mix up between management and customer on symptoms
Had this one in was quick easy fix , but miss interpretation of symptoms by management could of cost some time . But seen these problems before and quick smoke test verifying fuel tank venting well . So suspected shouldn't be a fill up issue , which is what management had relayed to me . As a customer complaint , but zeus performed well flagging data pids on tank pressures showing vacuum present during non purge . But posting just share simple thing as getting accurate symptoms could lead to waste time . Was suspecting usual symptoms associated with purge stuck open , running and starting issues after fill up . After another phone call to customer , symptoms suspected verified as the complaint . Purge valve replacement and road test until monitors completed , verified fix .