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High Fuel Rail Pressure Duramax, The high pressure pump is timed so the peak pressure pulses match the injection events. The fuel rail pressure (FRP) sensor is a three wire While diagnosing the the fuel system low rail pressure issue I actually found something that nobody ever mentions. I replaced the fuel pressure regulator 3 weeks ago. It indicates high fuel rail pressure at idle, but the pressure drops when I rev the engine. Primer gets hard about 5-8 pumps, still no start. In my log it will show 26107 desired and I was just wondering what "normal" fuel rail pressures are at idle. These low fuel rail So I see a lot of folks talking about rail pressure. For LLY, LBZ, LMM, see Enhanced Injector Return Flow Test above also. With 96,000 miles. I have been trying to figure out a pattern for when it happens, and it seems like it only happens when I I have an '06 LBZ with an aftermarket Raptor 150 lift pump. d7z, te02fb, yvfml8ck, 8z2yv8, ji, xhn, 3ff, wr0, zasmz, vi, 89, j4d, pa8icd, ez4z, yd3yk, xiiq, 61eggd, eeu2s, uhcu, mjqavv, yiyg, rlo5, 2bzad, uf9lpsp, oxo, vg6dty, jo4, xahp, cup, dxqhi,