Both the Ford Powerstroke 6.0-L and 7.3-L engines are known to experience cold start or injector stiction issues. The 7.3-L was produced between 1994 and 2003, while the 6.0-L was produced between 2003 and 2007. Both engines were actually manufactured by Navistar International and incorporated the HEUI injector system. Engine stiction or cold start issues are in fact more prevalant and often more serious in the 6.0-L version.
Hydraulic electronic unit injector (HEUI) type fuel injectors were commonly used in many medium-duty truck models for many years. In part, because of the issues with stiction and the failure rate of the HEUI fuel injectors, Ford discontinued their use in 2008, and changed to the most widely used fuel injection system to date, the peizo ceramic electronic injector. Peizo ceramic electronic injectors overcame the problems inherent in the design of HEUI fuel injectors.
Since its disappointment with the performance of the 6.0-L engine, Ford discontinued its relationship with Navistar International finally in 2010. Since 2011, the Ford Powerstroke engine is made in-house by Ford.
Failure in the HEUI injection system of the 6.0-L engine is caused by multiple factors. Use of Archoil’s AR9100 Nanoborate Friction Modifier can help to overcome these problems:
AR9100 Nanoborate Friction Modifier alleviates the problems due to oil breakdown, varnish build-up, stiction of the spool valves, decreased efficiency of the HPOP, and the resultant decreased performance of the 6.0-L and the older 7.3-L Ford Powerstroke engines. AR9100 Nanoborate Friction Modifier reduces friction, dissolves carbon and varnish deposits, enhances the lubricant qualities of oil, and increases fuel efficiency of the Powerstroke, or, actually, any mechanical engine or system.