When diagnosing a Hard or No start condition on a 7.3 Power Stroke diesel, one of the first step to take is a Visual Inspection of the engine and chassis. Visual Engine/Chassis Inspection Purpose:This is a visual inspection to check the general condition of the engine and look for obvious causes of a hard start or no start conditions. Recommended Procedure: Inspect … [Read more...] about Visual Engine / Chassis Inspection
no start
Sufficient Clean Fuel
Purpose:The purpose of this test is to see if the fuel system is getting sufficient clean fuel to start and run. Recommended Procedure:Route a hose from the fuel drain line to a clear container and open the drain. Crank the engine and observe the fuel flowing into the container. Stop cranking the engine when the container is half full. Observe the WATER IN FUEL lamp while … [Read more...] about Sufficient Clean Fuel
Retrieve / Clear Continuous DTCs
Purpose:To determine if the PCM has detected any historical or intermittent fault conditions that would cause a hard start/no start symptom. The condition that caused a continuous DTC may no longer exist. Recommended Procedure: Perform the necessary vehicle preparation and visual inspection. Connect the OBDII Scan Tool / Tester to the DLC under the dash. Turn … [Read more...] about Retrieve / Clear Continuous DTCs
Perform KOEO On-Demand Self Test
Purpose:To determine if the PowertrainControl Module (PCM) has detected any fault conditions that would cause a hard start or no start condition. Key On Engine Off (KOEO) On-Demand Self Test is a functional test of the PCM performed on demand with the key on and the engine off. This test will check that all inputs and outputs (circuits, sensors, regulators, relays and … [Read more...] about Perform KOEO On-Demand Self Test
Monitor ICP While Cranking
Purpose:To determine if the injection control system can supply enough injection control pressure to sustain starting. Recommended Procedure:Connect OBDII Scan Tool to the data link connector (DLC) under the dash. Access ICP PID on Scan tool menu nd monitor ICP reading while cranking the engine. Note: CMP signal is required before injection control pressure is … [Read more...] about Monitor ICP While Cranking