2001 RV Cummins 8.3L ISC CAPs Injection System - Low Power/Stall/Intermittent No Start

Low power, surging, low crank times, stalling, no restart. False engine speed sensor codes
with codes 329 and 456 being caused by an algae blockage on the inlet of the lift/transfer pump.

Fault Codes
115 - Engine Speed Sensor (ESS) Circuit
(PID: P190, SPN: 190, FMI: 2) - No engine speed signal detected at pin 17 of the engine harness (Effect - Engine power derate Possible white smoke)
121 - (Effect - no engine speed and position backup main speed/position sensor
329 - (SPN: 1077, PID: S233, FMI: 12) ECM detected an overpumping malfunction in the Cummins accumulator pump system (CAPS) pump (Effect - Low power, possible engine shutdown)
456 - (SPN :94FMI:10) - Fuel Delivery Pressure - Abnormal Rate of Change

00:00 - intro
01:21 - CAPS ISC 8.3L
01:40 - symptoms
03:30 - a $10k repair you didn't need
04:00 - algae on the inlet of the transfer pump
07:48 - test drive
09:45 - trouble codes
11:05 - transfer or lift pump leak
14:10 - false engine speed sensor codes

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