If the oil is close to the top, the problem could be a bad or failing 7.3 IPR. You can also remove the HPOP Reservoir inspection plug/fill port (scroll down to step #9 on that article) and check the oil level. If not, your problem may be in your high pressure oil system. If you have a basic scan tool that will check the ICP pressure when you are starting your engine, make sure it generates the minimum pressure-500psi. Check to make sure no oil is seeping from around the IPR, signaling that your 7.3’s IPR o-ring may have failed. Obviously, a visual inspection of the 7.3 IPR where it screws into the HPOP would be in order.
If your 7.3 Powerstroke engine has any of the above-mentioned symptoms, you’ll need a way to troubleshoot it. If that happens the spacer and 7.3 IPR Solenoid will come off and your diesel engine will die. Yet another specific symptom is a result of the Tinnerman nut coming loose. Once your engine does restart, it’ll run and then idle until it shuts down. Your 7.3 Powerstroke won’t sputter to a stop, it’ll just shut down and won’t start again unless you apply a lot of throttle. Then your 7.3 diesel engine will start idling roughly and then it’ll shut off with no warning. When your truck does start, you’ll be able to rev the engine and then idle okay for a few minutes. Your 7.3 diesel will start sometimes and not others. Some specific 7.3 bad IPR symptoms Your 7.3’s IPR may be stuck
7.3 IPR SpacerĪllows the IPR to have its required length. The Tinnerman, or “tin nut” as it’s commonly called, is a 1/2″ x 20 fine threaded nut. Is a thin sheet metal retaining nut designed to hold the 7.3 Injection Pressure Regulator solenoid in Place. Here’s a detailed diagram of all the parts on a 7.3 Injection pressure regulator. 7.3 IPR – Injection Pressure Regulator Parts And the 7.3 HPOP is located under the fuel filter housing. Your 7.3 Powerstroke’s IPR is located in the center of the engine compartment, screwed into the lower right rear of your high pressure oil pump-HPOP. So just where is the IPR valve located on a 7.3 Powerstroke anyway? IPR Valve 7.3 Location Ideally, the 7.3 IPR, ICP, PCM, and HPOP work together to provide enough oil pressure to the 7.3 injectors so that when you press on the accelerator, your injectors actuate and your diesel engine gets fuel and the cylinders fire. The 7.3 Powerstroke ICP - Injection Control Pressure sensor - sends the current pressure reading to the PCM - Powertrain Control Module - which in turn signals the 7.3 IPR to physically add or reduce pressure. When you buy through links on our site, we may earn an affiliate commission.