I have had a question come up in my mind awhile back, and then come to find out OTC tools had the same idea. Every now and then we will have an engine come in the shop that has common rail fuel system, and we need to check the rail pressure (no start/hard start/low power). And of course, it will be a brand that we don't have a scan tool for (Deere, Cat, etc.). I have wondered how hard it would be to back-probe the fuel pressure sensor and read the voltage and get an idea of fuel pressure....
Common rail fuel pressure reading?
Common rail fuel pressure reading?
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