A customer's complaint about my fuel filter timing changed my whole routine
Ran a fleet truck through the shop in Boise last month and the driver said it cranked forever before firing. I always replaced filters and just bled the lines until fuel dribbled out, figured that was enough. He told me I was leaving air trapped in the head and pointed at the return line banjo bolt. Now I crack that bolt first, let it purge a solid 10 seconds, and I haven't had a single hard-start complaint since. Anyone else run into this where you think you're done but the air is still hiding somewhere else?