Join Date: Nov 2006
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Rep Power: 9
Take them out and send them to a competent diesel fuel injection service shop. They will check for delivery pressure and spray pattern. If they don't check out you can have them rebuilt or buy new. Although your engine doesn't have a lot of hours, it is probably good to follow the OEM recommendations before your trip.
I'd carry at least one spare injector, a set of copper washers (gaskets) along with other recommended engine spares.