The legendary 7.3 Power Stoke Diesel engine, when properly maintained can provide years of trouble free service. However there are several common problems that can develop over time. ![]() Generally speaking these can all be resolved relatively easily. Listed below are 9 common problems of the 7.3 Liter Power Stroke Diesel engine, in no particular order. 7.3 Power Stroke Diesel Common Problem #1: Causes No Start: Injection Pressure Regulator (IPR) Valve, located in the valley on the High Pressure Oil Pump (HPOP). Doesn't have the handles out the side, either. Doesn't have the loops coming out of front plastics. From $14 or replacement part number. Cost $140-$300 for new. 7.3 Power Stroke Diesel Common Problem #2: Causes No start: Injector Driver Module (IDM), located on drivers side fender. These can go bad or get damaged from water and will cause a no start or rough running and cut outs in revving/rpm. Check for damaged wiring, moisture or water intrusion. Be sure to check your specific IDM part number as it is engine specific. For 99-2003 F-Series Pickups and E-Series Cargo van, IDM 120, includes part number:. Replacement cost $50-$350 for used-new. 7.3 Power Stroke Diesel Common Problem #3 Cam Position Sensor (CMP). Can cause the engine to cut out and eventually die. Making it not start until it sits or is reset on the batteries. An easy way to make sure yours is good; on the Old Body Style (OBS), check if your tachometer moves while cranking, if it does your CMP is good, If not replace. On the truck that is done in the Injector Driver Module (the IDM) and the voltage is 90 volts at 7 amps. Now you can test the resistance of the injectors, but that will not tell you if they are going to work. In July of 2003, Dave and I began building the first test or prototype sets of injectors; in March of 2005 we began custom tuning of the PCM to get the best possible performance out of our injectors; in September of 2006 we turned our attention to what was between the PCM (tuning) and the injectors--the Injector Driver Module. Cost $24-$70. Don't buy the generic sensors from any parts store, get an OEM Cam Position Sensor, part number, because some aftermarket CMPs can be defective out of the box. Keep known good a spare in your glove box. 7.3 Power Stroke Diesel Common Problem #4 Under Valve Cover Harness (UVCH) Connectors, when these come loose or get shorted they can cause rough running conditions to the point where the truck sounds like it has 17* timing and it lopes bad and will often die and sputter. An easy way to fix this or check for it, there are four connectors on your block / heads that are under the valve covers unplug them and check for cut wires, loose or burnt connectors, if they are burnt or damaged, replace them. It's a simple fix. The entire valve cover gasket kit with connectors, part number, can be replaced for $100 or less. 7.3 Power Stroke Diesel Common Problem #5 Clogged fuel filter. Guide to computer forensics and investigation pdf.
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