How To Diagnose Air in The Fuel System of a 7.3

How To Diagnose Air in The Fuel System of a 7.3 In this video I show a method to diagnose a fuel system on a older 7.3 motor. At first I thought my fuel pump was bad but through running tests I found out it wasn't my fuel pump but in fact several possibilities that the best remedy was to delete my whole fuel system and stream line the system to one large tank. My original fuel problems started when the fuel filter light came on and my motor started surging and bogging down. Through running some tests i figured out that the fuel filter light can come on due to either excess fuel pressure or if the injection pump pulls a vacuum inside the fuel system. Since my fuel pressure wasn't too high that means my fuel system has a restriction or air is getting into the fuel system. So i started running some tests to help figure out my problem with my fuel system and my fuel pump. The possible problems could be: 1) fuel tank pickup is broken inside the tank(possibility because if you run the front tank below a half of a tank it starts sucking air) 2)a clog or fuel restriction caused by a failed section of fuel line(which I found) 3)a failed/failing fuel selector valve(a possibility because the selector valve doesn't work to select the rear tank and one works for the front tank) So this can help with diagnosing air in fuel systems, and help with trying to diagnose why the fuel filter light kept coming on, and help you on how to tell if your fuel problem is before your lift pump or after it. All of these thing together makes it to where id would be safer to replace the whole system but with as costly as that would be it would be batter and safer bet to replace the tanks with a larger fuel supply tank and eliminate any possibility of problems from my old system. One of the biggest issued the 7.3idi suffers from is air in fuel and air intrusion into fuel systems. The syompoms of a 7.3 air in fuel symptoms include the trucks rps bogging down and then surging. or could seem like a skip in the motor, regardless a 7.3 air in fuel system problem is a major issue and should be dealt with immediately! ----------------------------------------------------------------------------------------------------------- I am using a Lincoln Ranger 225 engine driven welder as my power source Welder review:    • My Engine Drive Welder, Lincoln Ranger 225...   Radnor stinger Radnor ground clamp HOW TO HOOK UP A SCRATCH START TIG RIG VIDEO LINK:    • How To Hook Up a Tig Torch on Lincoln Rang...   ----------------------------------------------------------------------------------------------------------- Adam's welding is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. I get commissions for purchases made through links in this post. WELDING LEAD AMAZON AFFILIATE LINK: DENSE CONNECTOR AMAZON AFFILIATE LINK: WELDING GLOVES AMAZON AFFILIATE LINK: JACKSON SAFETY WELDING HELMET AFFILIATE LINK: DEWALT ANGLE GRINDER AMAZON AFFILIATE LINK: TIG TORCH KIT AMAZON AFFILIATE LINK: TIG TORCH CONSUMABLE KIT AMAZON AFFILIATE LINK: FUEL PRESSURE TESTER AMAZON AFFILIATE LINK: ----------------------------------------------------------------------------------------------------------- Incase you are new to my channel. I am Adam and this is my welding channel Adam's welding, I have been welding for a few years now and finally started up a channel on YouTube to show some of my personal work and maybe teach some of you a tip or trick i have learned along the way. I hope you enjoy my channel! If you like my channel like, comment, subscribe, and click the little bell icon to be notified of my future videos!!! About my channel:    • ADAM'S WELDING CHANNEL, Do you want to mob...   My welding rig is a 1990 f350 7.3idi dually, with a Lincoln ranger 225 Rig Walkaround:    • My Engine Drive Welder, Lincoln Ranger 225...   Welder review:    • My Engine Drive Welder, Lincoln Ranger 225...   FACEBOOK:   / adamsweldingrig   INSTAGRAM:   / adam_welding   ----------------------------------------------------------------------------------------------------------- Playlists: Welding rig playlist:    • ADAM'S WELDING CHANNEL, Do you want to mob...   Stick welding playlist:    • Stick welding   Tig Tuesday Playlist:    • Tig Tuesday