The PCM will then use default settings for the ICP and the rough running should go away. You can check to see if the 7.3 ICP is causing that rough running by unplugging it. 7.3 Powerstroke Common Problem #10 – ICPĪ 7.3 Injection Control Pressure sensor–ICP–sensor failure, will make your diesel engine run rough.
When that happens it disables the PCM–Powertrain Control Module. A common problem with it, especially as your Powerstroke ages, is that it can blow the maxi fuse and/or fail or short itself out. The 7.3 fuel bowl heater element sits at the bottom of the fuel bowl. Read DHD’s 7.3 Water Pump Leak Article – Fixing a 7.3 Water Pump Leak 7.3 Powerstroke Common Problem #9 – Fuel Bowl Heater Rusted thermostat, worn or perforated radiator, a failed 7.3 water pump, running the wrong or bad coolant, and/or a broken engine cooling fan. Several things can cause your 7.3 to overheat. Read the 7.3 IPR article – 7.3 IPR – Injection Pressure Regulator 7.3 Powerstroke Common Problem #8 – Overheated Engine Read this article for more detail on troubleshooting and fixing the 7.3 IPR. It can stick, get leaking o-rings, fail, or have a faulty connector. Injection Pressure Regulator is a valve on the 7.3 high pressure oil pump. Aftermarket springs and shims are available to solve the problem. This led to valve float at high RPM’s sometimes causing bent or broken pushrods. 7.3 Powerstroke Common Problem #6 – Valvetrainħ.3 Powerstroke valve springs didn’t have a high seat pressure. This would cause rough starting and/or misfires. The under valve cover harness–UVCH–would stop communicating with the glow plugs or injectors. Many 7.3 common problems were due to worn, fraying, and/or melted wires. 7.3 Powerstroke Common Problem #5 – Fraying and/or melted electrical wiring This would cause a loud whining, “jet-engine” noise to come from the exhaust. 7.3 Powerstroke Common Problem #4 – EBPV failure.Īged Exhaust Back Pressure Valves would open up in cold weather and stick on. Leaking of the up-pipes causes the engine to lose power and for exhaust gas temps–EGTs–to increase. The pipes can leak from many points but most commonly at the joints. 7.3 Powerstroke Common Problem #3 – Leaking turbocharger up-pipes And the o-rings on the fuel filter drain lever on the back of the fuel bowl assembly would corrode and leak. The heating element inside the fuel bowl filter housing can short out, blowing a fuse and causing no start. The filter housing develops cracks in the aluminum housing and leaks fuel. Read the 7.3 CPS article – 7.3 CPS-Cam Position Sensor 7.3 Powerstroke Common Problem #2 – 7.3 Fuel Bowl – fuel filter/water separator
Read this article for details on 7.3 CPS troubleshooting and replacement. **Careful though, because after 2001 Ford changed the way the tach received electrical signal and this is no longer a reliable method to troubleshoot the CPS. If the tachometer doesn’t move, the CPS is probably bad.** An easy way to diagnose a failed CPS is to check for tach movement when you crank the engine over. The failure of this sensor would create a no start condition or would shut the truck off as you were driving. You bring those and we’ll show you where to point them… Top 10 7.3 Powerstroke Common Problems 7.3 Powerstroke Common Problem #1 – 7.3 CPS–camshaft position sensor Time, tools, and some tenacity go a long way in DIY repairing your 7.3 diesel’s most common problems.
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