GMC 13502903 Sensor Assembly, Fuel Tank Pressure

The EVAP system in a car is desigend to trap and hold fuel vapor from the fuel tank and intake manifold. It comprises a canister filled with charcoal and several lines that connect it to the throttle body, the fuel tank, and the atmosphere. Typically, this canister is positioned under the vehicle near the fuel filter. Fuel vapors are collected when an engine is off from different parts such as intake manifold, throttle body and fuel tank they are stored at the canister. In case of operation of the engine these fuels are pushed out of canister into combustion by an airflow during purge process via charcoal. The purge valve solenoid which is used to open or close a mechanically actuated valve called a purge valve, was present on some older models; its place among other components has been standardized on today's vehicles. Rarely does EVAP system fail but old vehicles may have leaks causing loss of fuel vapour hence leading to environmental concerns alongside wastage of oil products. Obvious signs of malfunctions include smells of gasoline along with bad idle wether stalling or reduced drivability that could be accounted for by problems related to purging valves gone wrong, broken tanks, cracked hoses or wrong hose connections. There may be difficulties with finding leaks because there is so much tubing and ducting in this system but look underneath the vehicle might reveal obvious problems like leaking tubes therefore if you cannot find where they coming from then it would be better for you to get a professional pressure test done on your system. If diagnosed diagnosis , components in question including EVAP canister purge valve, EVAP vent valve, evaporation (EVAP) canister or fuel tank pressure sensor etc., most times that replacement can usually be carried out by following relevant procedures for removing & installing them at home though sometimes requires experts in repair works only.

The fuel pressure sensor is located under the vehicle, on the fuel supply line. To replace it, first relieve the system fuel pressure. Then, raise the vehicle and support it securely on jackstands. Disconnect the electrical connector from the fuel pressure sensor by depressing the release tab. To remove the sensor from the fuel supply line, hold the flats on the fuel line with a wrench to prevent twisting the line, then unscrew the sensor. Unscrew the fuel pressure sensor from the fuel supply line. Remove and discard the old fuel pressure sensor O-ring. Coat a new O-ring with a little clean engine oil, then install it on the fuel pressure sensor. Installation is otherwise the reverse of removal. Be sure to tighten the fuel pressure sensor securely. Before lowering the vehicle, test for leaks by turning the ignition switch key to the ON position (don't start the engine) for two seconds, then to the OFF position for ten seconds, then back to the ON position. Inspect the area around the fuel pressure sensor for leaks. The Fuel Pump Driver Module (FPDM), also referred to as the Fuel Pump Power Control Module, is located under the vehicle, above the spare tire. Remove the spare tire from the vehicle. Raise the rear of the vehicle and support it securely on jackstands. Remove the spare tire. Disconnect the electrical connector from the FPDM. Remove the FPDM mounting bolts and remove the module from its mounting bracket. Installation is the reverse of removal.

To replace the fuel pressure sensor, relieve the fuel system pressure, lift the vehicle onto jackstands, and disconnect the sensor's electrical connector. Unscrew the old sensor, discard its o-ring, and fit a new oiled o-ring onto the new sensor. Reinstall in reverse order, ensuring the sensor is tight. Before lowering, test for leaks by toggling the ignition switch to ON for two seconds, OFF for ten seconds, and back to ON, checking for any leaks around the sensor. For the fuel pump driver module, elevate the vehicle, disconnect its electrical connector, remove three mounting bolts, and extract the module. Reverse the process to install.

Four versions of the fuel pressure sensor exist, the V6 engines have one on the fuel rail and one on the fuel feed pipe or fuel tank, depending on the model year. The V8 models have one sensor, either on the fuel feed pipe or fuel tank. To replace, relieve fuel tank and system pressure, disconnect the battery, and locate the sensor. For V6 engines, remove engine covers and intake manifold to access the sensor on the fuel rail, or raise the vehicle for the sensor on the fuel line.

Relieve the fuel system pressure first. Then, disconnect the Fuel Pressure Sensor (FRPS) electrical connector. To prevent fuel from entering the generator during FRPS removal and to catch some of the fuel from the fuel rail when the sensor is removed, place a towel on top of the generator. Using a 27mm socket, and being careful not to damage the foam insulator, remove the sensor. Fuel will drain from the opening in the fuel rail where the sensor was attached. This fuel must be washed away and the area dried prior to starting the vehicle. Installation is the reverse of removal. Upon starting the vehicle, immediately inspect for fuel leaks.

Fuel evaporative emissions control (EVAP) system is the system responsible for managing the fuel vapors from the fuel tank, and releases them into engine intake during engine operation. Key elements of this system include a canister which has activated charcoal that absorbs fuel vapors, purge valve, vent valve, fuel tank pressure sensor, fuel tank, and various vapor lines and purge lines. After going through a check valve, the fuel tank vapor goes to a charcoal canister where it is absorbed and stored by the charcoal.There are certain conditions under which PCM (Powertrain Control Module) will open both the purge and vent valves resulting in drawing of fuel vapors from canister into manifold for combustion within the intake manifold.The PCM regulates vapor flow rate through EVAP purge valve control solenoid by cycling it on and off so as to optimize purge based on engine conditions. During cold start-up mode of operation, this system self-diagnoses by creating vacuum in EVAP system to detect leaks while PCM monitors the voltage of Fuel Tank Pressure Sensor.The Fuel Tank Pressure Sensor supplies MAP sensor like signal voltage to PCM representing air pressure within the fuel tank. Replacement procedures usually entail disconnecting quick connect fittings then cleaning area before removing mounting bolts; hoses; electrical connectors etc. Specific removal and installation procedure for replacing EVAP canister, purge valve, vent valve and fuel tank pressure sensor.This is because there is an EPA-mandated warranty that covers this evaporative emission control system.

The fuel pressure sensor is at the fuel line under the vehicle, to the right front of the fuel tank on a vehicle. First of all, pull out the cable in the negative terminal of the battery. Thirdly, release the fuel system pressure next. Lift the automobile and place it on stable stands so that you can work conveniently underneath it. Remove the electrical connector from the fuel pressure sensor as shown in the image below-Next to the sensor, you need to put a drain pan, after that to remove the sensor from the fuel line you need to untwist it. It will be necessary to fit a new O-ring and the fuel pressure sensor, before tightening it, reconnect the electrical connector. Last, connect the battery cable and, when you turn on the vehicle, check for fuel drips instantly.

Relieve the fuel system pressure first. Then, disconnect the Fuel Pressure Sensor (FRPS) electrical connector. To prevent fuel from entering the generator during FRPS removal and to catch some of the fuel from the fuel rail when the sensor is removed, place a towel on top of the generator. Using a 27mm socket, and being careful not to damage the foam insulator, remove the sensor. Fuel will drain from the opening in the fuel rail where the sensor was attached. This fuel must be washed away and the area dried prior to starting the vehicle. Installation is the reverse of removal. Upon starting the vehicle, immediately inspect for fuel leaks.

First, you will need to relieve fuel system pressure and disconnect the cable from the negative battery terminal in order to remove the fuel rail sensor. The intake manifold should then be removed and an electrical connector unplugged to gain access to the sensor. As a final step on this, unscrew it from a fuel rail. A reverse of removal is installation, with retightening of the sensor to specified torque. To remove a fuel feed pipe sensor at 2015 or prior models, raise and support rear of vehicle using jack stands; remove protective cover from fuel tank; disconnect electrical connector and unscrew it out of feeding line. Reverse operations serve as fitting procedure. In case of 2016 and further models, take off your gas tank while replacing both fuel pressure sensor and feed pipe together as one unit and unplug electric connection for your former type first; Then by doing same "removal" only backwards again after replacement process are carried out in other words hence installation means same.

The Evaporative Emission Control which is abbreviated as EVAP system is aimed at avoiding fuel system vapors that contain unburned hydrocarbon from being released to the atmosphere. In main warmer, fuel vapors in the fuel tank get to expand and, once a given pressure is attained, they are directed through the fuel vent valve and the fuel EVAP control valve and into the canister for storage until consumed with the engine. The canister purge solenoid is controlled by the Powertrain Control Module (PCM) and the PCM opens it in certain conditions to let the vapours to fill the intake manifold to join the air/fuel mixture before combustion. The EVAP canister is the part of the vehicle situated beneath the car near the fuel tank and packed in the activated charcoal; the EVAP canister is reasonably maintenance-free. The fuel tank pressure sensor contributes detecting the pressure of the tank as well as signaling the PCM during tests with leaks. Located in the intake manifold vacuum and sensor, normally open, the vent solenoid seals the EVAP system for maintenance and testing, while the canister purge solenoid closes the system under the control of PCM. Diagnosing an electrical issue in EVAP system may not be easy but the symptoms which may suggest some goofs in the system include fuel smell, poor idle, stalling and low drive ability due to bad parts or the system having some leak. To ensure that fuel vapor pressure is not high, the gas cap can be unbolted and special sound, WHOOSH, which means pressure issues or hoses/valves, can be produced. Component replacement is usually accompanied by the removal of electrical connectors and hoses, the removal of the mounting brackets and every other related part, and then tightening and connecting where required in the reverse manner.

To replace the fuel pressure sensor, relieve the fuel system pressure, lift the vehicle onto jackstands, and disconnect the sensor's electrical connector. Unscrew the old sensor, discard its o-ring, and fit a new oiled o-ring onto the new sensor. Reinstall in reverse order, ensuring the sensor is tight. Before lowering, test for leaks by toggling the ignition switch to ON for two seconds, OFF for ten seconds, and back to ON, checking for any leaks around the sensor. For the fuel pump driver module, elevate the vehicle, disconnect its electrical connector, remove three mounting bolts, and extract the module. Reverse the process to install.

To replace the fuel pressure sensor, relieve the fuel system pressure, lift the vehicle onto jackstands, and disconnect the sensor's electrical connector. Unscrew the old sensor, discard its o-ring, and fit a new oiled o-ring onto the new sensor. Reinstall in reverse order, ensuring the sensor is tight. Before lowering, test for leaks by toggling the ignition switch to ON for two seconds, OFF for ten seconds, and back to ON, checking for any leaks around the sensor. For the fuel pump driver module, elevate the vehicle, disconnect its electrical connector, remove three mounting bolts, and extract the module. Reverse the process to install.

The evaporative emissions control (EVAP) system of fuel has various parts including the canister, purge valve, vent valve, fuel tank pressure sensor, fuel tank and vapor and purge lines. The system functions by soaking up petrol fumes from the fuel tank as well as discharging them to the engine inlet during engine operation. The vapors are absorbed by the canister which is filled with activated charcoal; they are then drawn into the intake manifold and combustion chamber through purge hose under intake manifold vacuum. The PCM modulates the flow of vapors by regulating duty cycle on EVAP purge valve control solenoid. At cold start, the system does a self-diagnostic test with PCM monitoring fuel tank pressure sensor voltage for any leakages. There are step-by-step instructions provided to replace EVAP canister, purge valve, vent valve and fuel tank pressure sensor for each of these components.

Fuel evaporative emissions control (EVAP) system is the system responsible for managing the fuel vapors from the fuel tank, and releases them into engine intake during engine operation. Key elements of this system include a canister which has activated charcoal that absorbs fuel vapors, purge valve, vent valve, fuel tank pressure sensor, fuel tank, and various vapor lines and purge lines. After going through a check valve, the fuel tank vapor goes to a charcoal canister where it is absorbed and stored by the charcoal.There are certain conditions under which PCM (Powertrain Control Module) will open both the purge and vent valves resulting in drawing of fuel vapors from canister into manifold for combustion within the intake manifold.The PCM regulates vapor flow rate through EVAP purge valve control solenoid by cycling it on and off so as to optimize purge based on engine conditions. During cold start-up mode of operation, this system self-diagnoses by creating vacuum in EVAP system to detect leaks while PCM monitors the voltage of Fuel Tank Pressure Sensor.The Fuel Tank Pressure Sensor supplies MAP sensor like signal voltage to PCM representing air pressure within the fuel tank. Replacement procedures usually entail disconnecting quick connect fittings then cleaning area before removing mounting bolts; hoses; electrical connectors etc. Specific removal and installation procedure for replacing EVAP canister, purge valve, vent valve and fuel tank pressure sensor.This is because there is an EPA-mandated warranty that covers this evaporative emission control system.

Disconnect the cable from the negative battery terminal and remove the engine cover. Relieve the fuel system pressure and wait at least two hours before proceeding. Remove the intake manifold and remove the foam insulator. Disconnect the electrical connector from the sensor and unscrew the sensor from the fuel rail. Installation is the reverse of removal. Tighten the sensor to the torque.

After relieving the fuel system pressure, you need to remove the intake manifold.

Disconnect the electrical connector from the EVAP purge control solenoid valve, which is located on the top of the intake manifold, next to the throttle body.

Remove the fuel tank filler cap.

Start by removing the fuel tank filler cap.

To remove the engine covers, you need to relieve the fuel system pressure and disconnect the cable from the negative battery terminal.

The canister is situated atop the fuel tank and requires raising the vehicle, disconnecting electrical connectors and labeled hoses, then detaching it from its mounting bracket for removal and installation.

The first step is to relieve the system fuel pressure and raise the vehicle on jackstands.

The first step is to relieve the system fuel pressure and raise the vehicle on jackstands.

To install the sensor, simply reverse the removal steps and tighten it to the specified torque.

After removing the fuel pressure sensor, you should remove the old o-ring and replace it with a new one coated in clean engine oil.

13502903 IS LOCATED ON THE FUEL SENSOR......

This sensor is located on the top side of the tank