Okay so in the process of cutting off the existing EGR mounting point on the 4th gen engine, we nicked the fuel line just after it comes out of the rail ((( so, wondering if the 3rd gen fuel rail/lines are able to be swapped into the 4th gen? Does anyone know if this is possible? Thanks.
Depending upon how much of what parts you're using I would think so It's all 1Z so in theory yes I don't have the swap but Toyota swamps are generally pretty straightforward and I've done many just not with the onesie engine connected to the hybrid synergy drive system so there's always that but all that stuff should be predominantly plug and play It just depends on how much of what you have to use to use whichever system you're using I haven't looked at all the fuel point connections but in a onesie car basically with pretty much the same components you would think take off the lines and hold them up to the places where you want to put them and see what you got they're all preformed pretty easy to disconnect
This guy knows more about Prius engine swaps and Prius engine rebuilds than anyone else: https://www.instagram.com/skimmilkhybrid/
If you have a Gen 3 that you're replacing then I would think you have all your hoses in place as a Gen 3 and then with the Gen 4 motor set in place you should be able to lay both sets of hoses and see what it is you're going to need to do basically
