Sprinter… on the road

So, we stopped yesterday after james complained that the van was surging, loosing power suddenly, and just not behaving right. I found a Dodge dealership in Toledo Ohio that apparently does has tons of sprinter experience and parts.

Two hours of diagnostics later, I was told we needed a new fuel pressure sensor, a $400+ part, that would need to be ordered. Not an option, had to be in Cleveland for the show last night. So, we hit the road, and tried to just deal with the problem, the sprinter slipping in to "Limp mode" as mercedes calls it, until we eventually lost power on the highway at full speed, a little scary. We eventually made it to the venue, and after we played I inspected the fuel pressure sensor as seen above. To my surprise the wiring harness was damaged. Really?!?! why didn't the techs at the dealership catch this. Two of the wires shorting out. I used a bit of electrical tape to insulate the wires, pulled out my OBD2 pocket scan tool, cleared the codes, restarted the van, drove it 10miles on the highway at full speed, with no problems, rescanned, No Codes! Any competent tech would have caught this immediately. In the service manual it explicitly states after scanning the code P2306 Sensor Supply 2 Voltage Low that the first thing to do, is to turn the car off, clear the code, and then rescan. The second step is to visually inspect the wiring on the boost pressure sensor, and the fuel pressure sensor. Either the tech didn't read the manual, or didn't follow the directions.