I bought one of these at Harbor Freight when my Ford F250 Super Duty died in front of the store, of course! I pulled up so that we could load the 2 ton engine crane because the **** manager would not allow his employee or me to roll that cart that it was on out into the parking lot. It turned out to be my fuel pump, but of course didn't know what was wrong, my Matco scanner was at home, my wife was at the hospital with her father so I was like what the hell.
I was fortunate that I got the truck started one time after waiting 1/2 hour and drove it home, where I then determined it was the fuel pump based on fuel pressure along with using a Power Probe 3. But after that I determined that I will always keep a scan tool in the glove box of each of my vehicles. Figured between a scan tool and my smart phone I can look up codes, find prices/availability on parts and call for a pizza.
TheGrooveking