The ECM controls a number of systems, but the most important ones for our purposes are the air to fuel ratio, the engine timing.
That is why it is so important to recognize the symptoms of ECM failure. When conditions change, the ECM will automatically make adjustments in real-time. Your car’s Engine Control Module (ECM) monitors all the sensors in the vehicle to make sure that the car’s systems are running as they’re supposed to. (35 Nm).Īttach the fuel lines, then connect the negative battery cable, start the engine and check for leaks.4 Painful Signs That Your Car’s Engine Control Module Has Problems (35 Nm) and the outer fuel tank strap-to-vehicle nuts/bolts to 26 ft. Torque the inner fuel tank strap-to-vehicle bolts to 26 ft.
#1989 GMC SAFARI BATTERY TRMINAL BOLTS INSTALL#
Install the fuel tank, align the insulator strips and install the strap bolts. J–24187 (or equivalent) or a brass drift and a hammer, turn the sending unit-to-fuel tank locking ring clockwise. Using the GM Fuel Gauge Sending Unit Retaining Cam tool No. NOTE: When installing the sending unit, be careful not to fold or twist the fuel strainer, for it will restrict the fuel flow. Using a new sending unit-to-fuel tank O-ring, install the sending unit into the fuel tank.
Push the fuel pump onto the sending tube. Inspect the fuel pump hose and bottom sound insulator for signs of deterioration, then replace it, if necessary. When the pump assembly is clear of the bottom support, pull it out of the rubber connector. NOTE: When removing the fuel pump from the sending unit, be careful not to damage the rubber insulator and the strainer. Pull the fuel pump up into the mounting tube, while pulling outward (away) from the bottom support. Remove the fuel pump from the fuel sending unit, by performing the following procedures: J–24187 (or equivalent) or a brass drift and a hammer, remove the cam locking ring (fuel sending unit) counterclockwise, then lift the sending unit from the fuel tank. Lower the tank slightly, then remove the sender unit wires, the hoses and the ground strap. Support the fuel tank and remove the fuel tank-to-vehicle straps. Raise and support the vehicle on jackstands. Using a hand pump or a siphon hose, drain the gasoline into an approved container. NOTE: Be sure to keep a Class B (dry chemical) fire extinguisher nearby.ĭue to the possibility of fire or explosion, never drain or store gasoline in an open container. If the fuel system has been in use, turn the ignition switch to OFF and allow the system time to reduce the fuel pressure.ĭisconnect the negative battery terminal from the battery. The pressure regulator contains an orifice in the fuel system when the engine is turned Off, the pressure in the system will bleed down within a few minutes. J–24187 or equivalent.īefore removing any component of the fuel system, be sure to reduce the fuel pressure in the system. NOTE: The following procedure requires the use of the GM Fuel Gauge Sending Unit Retaining Cam tool No. 4: With the locking ring removed, the fuel pump (and/or gauge sender) can be lifted from the tank 3: The fuel pump locking ring can also be removed using a brass driftįig. 2: The fuel pump and fuel gauge sender assemblyįig. 1: The fuel pump locking ring can be removed using this toolįig.
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