When the factory CP3 injection pump pulls fuel under a vacuum it can introduce air and vapor into your fuel, which can lead to injector failure. FASS FUEL SYSTEMS 2001-2010 GM DURAMAX 6.6L (DMAX-7001) FASS FUEL SYSTEMS 2011-2016 GM DURAMAX 6.6L (DMAX-7002)ĭuramax diesel engines do not come with a factory lift pump, this is why Duramax owners see such great performance and economy gains after installing an aftermarket diesel fuel lift pump. ![]() The Dura-Max Flow Enhancer creates a positive flow of fuel, “pushing” it to your injection pump, eliminating vacuum and drastically reducing air and vapor in your fuel. GM Duramax trucks do not have a stock lift pump which forces the injection pump to “pull” the fuel all the way from the tank, creating a vacuum and constantly introduces more air and vapor into your fuel. The Dura-Max Flow Enhancer is modeled around our very successful DDRP series and is now available for the GM Duramax.
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