for sale it’s my spaghetti that’s the real masterpiece,
Titleist AP1 Price

With so few common places for leaks to happen on your model year Caravan,
Titleist 915 Price, you might just consider buying a few inches of bulk 5/16" fuel line and the "peace pipe" hose that goes under the van. My feeling is that you have a near 100% chance of nailing the leak between what you already done and this. Complications with smoke testing the system yourself involve the evaporative system vent,
Titleist AP2 Sale, which defaults to an open state when no vacuum is applied.