Cummins isx sensor locations4/4/2024 ![]() The solution is twofold, one is to clean and inspect every connector (including the big one near the lift pump) and degrease/grease them with the right dielectric grease made for Packard connectors (a lot of techs fail to get that part). Some time ago Cummins issued a service bulletin to change the wiring from the old connector and lead that goes to the fuel pressure sensor to a new connector and lead - an upgrade kit was issued for this which included a new connector, three crimp connectors and an instruction sheet.Ī lot of time the connectors which are supposed to be sealed upon crimping, fail and the ECM sees the fuel pressure vary during idle hence rough idle and sometimes no starts. This CAPS pump was a computer controlled injection pump, with individual fuel lines to each injector.Ĭummins Accumulator Pump System (CAPS) fuel injection pump for Cummins 6 cylinder C series engines where used in heavy duty on-road, agricultural applications and many Motor-home applications.Ĭummins ISC 8.3 300 Hp Warm engine rough Idle The original ISC engine featured a Cummins Accumulator Pump System (CAPS). Beginning in 1998, Cummins introduced the ISC based off the earlier mechanical 8.3 C-series engine. ![]()
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