Description The Intake Air Temperature (IAT) sensor is mounted in the intake manifold (figure 5-25). Like the ECT sensor, the IAT is a thermistor that…
Category: GM 6.5
ENGINE COOLANT TEMPERATURE (ECT) SENSOR Description The Engine Coolant Temperature (ECT) sensor is mounted in the engine coolant stream (figure 5-23). The PCM uses coolant…
Similar to other fuel delivery systems on diesel engines, fuel delivery on the 6.5L EFI powerplant consists of four stages: • Pressurization • Distribution and…
The electronic injection pump is the heart of the fuel control system. The rotary distributor pump uses an electromagnetic control valve to regulate fuel flow…
PCM control can be divided into eight subsystems: • Fuel Control • Timing Control • Glow Plug Control • Boost Control • EGR Control •…
The Powertrain Control Module (PCM), located in the passenger compartment (figure 5-1), controls the EFI system. Internally, the PCM is programmed with calibration information specific…
Fuel Injection System Diagnosis Diagnosis of the fuel injection system includes the following diagnostic steps. INJECTION PUMP To check the fuel supply to the injection…
The fuel return system uses the following hoses and pipes (figure 4-8): • The housing pressure regulator is connected to the return system by a…
Each cylinder has an identical fuel injection nozzle mounted in the pre-combustion chamber. The nozzles are secured with threads and copper sealing gaskets to ensure…
The high-pressure discharge fittings on the head of the injection pump connect to the injection nozzles with steel lines of equal length and interior volume…