You only need to read the codes in the ECM as that is the only computer that runs the fuel system. The codes that are in the ECM are a help, but in some cases mean nothing unless accompanied by a certain symptom. You likely can’t get what you need from a shop manual either as that was probably written before I acquired all the knowledge and diagnostic experience I have now. To diagnose this fuel system requires a unique approach and a sense of humor as you can’t just plug in scan tool to get all the RIGHT answers. My REAL WORLD experience has allowed me to really fine tune what works and doesn’t work for diagnosing this fuel system.
#DODGE SYMPTOMS OF LOW VOLTAGE RAM PRESSURE FUEL UPDATE#
As I learn more I rewrite this amazing document to make it even better, so keep checking the update date so you are assured of the latest and greatest information. I am happy to share this knowledge and experience to help you make an accurate diagnosis of your truck’s VP44 fuel system and direct you to purchase the right part the first time. This is why I feel BEST qualified to help you. As I still answer the phone every chance I get, I am still learning from all of you, to give me way more REAL WORLD EXPERIENCE than others in the industry. Way back in 1998 when my brother and I received the only US Patent for enhancing fuel delivery for electronically controlled diesel engines, I felt that the research we did then might have made us a bit smarter than most, but I have to admit that the experience I have gained SINCE then has made me a much better teacher. I feel qualified to help you as I owned a full service performance shop for all Dodge Diesels, and Freightliner and Ford trucks with the ISB engine, from 1993 through 2006, when I became a website only, to specialize in this often misunderstood fuel system. I got this from VP44 Diagnostic I heard they have the top of the line VP44's for a bargin! They also have very accurate overviews and diagnostics of the VP44 so you do not waste thousands! All credibility goes to BlueChipDiesel. This information I am pasting down here is not mine.
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