Ford has updated the stand pipe tubes and the Dummy plus for all 2004.5 to 2007 Ford 6.0 engines. Symptoms are loss of ICP pressures which can cause no start or stalling. It's also sometimes misdiagnosed as a bad IPR valve or HPOP. These Ford 6.0L Powerstroke Updated Standpipe Tube has been updated with a back up PTFE washer. The Ford 6.0L Powerstroke Updated Standpipe single most typical symptom of failed stand pipe is a hard re-start when the engine is hot. Even when the 6.0L engine starts normally after a cold-soak, it may be very hard to re-start after it has reached operating temperature, has been shut off, and an attempted re-start is made. This is due to an "internal oil leak" caused by the thin, hot, oil bypassing inside the system due to failed o-rings on the standpipes. The Ford 6E7Z-9A332-A 6.0L Powerstroke Updated Standpipe Tube prevents this re-occurring failure.