Replacing the fuel pressure sensor (G247) in a vehicle can be a challenging task, especially without the right tools and guidance. This guide outlines the process of replacing this sensor, located in the intake manifold, offering insights and tips for a successful repair. The job requires removing several components, including the intake pipe and throttle body. Accessing the sensor involves detaching the manifold, which can be difficult due to limited space.
The removal of the intake manifold requires disconnecting multiple bolts, often requiring significant force due to age and corrosion. Using an impact wrench might be necessary to loosen these bolts. Replacing standard hex head bolts with more robust options, such as A4 marine grade stainless torx bolts, can prevent future issues and simplify subsequent repairs.
With the intake pipe and throttle body removed, accessing the fuel pressure sensor requires maneuvering the intake manifold. While ideally a two-person job, it’s possible to do it solo by carefully pulling the manifold up and back towards the firewall. This creates just enough room to access and disconnect the sensor’s electrical connector and then unscrew the sensor itself. Interestingly, newer Bosch sensors are slightly shorter, making reconnecting the cable easier.
Completely removing the intake manifold without lowering the engine is extremely challenging, if not impossible, likely requiring dropping the left engine mount. However, for replacing the fuel pressure sensor, complete removal isn’t necessary.
After replacing the sensor with a new Bosch unit and reassembling all components, a 300-mile test drive revealed a smooth idle and improved fuel efficiency, reaching 54.8 mpg. This confirms a successful repair and highlights the importance of addressing faulty sensors for optimal vehicle performance. While this guide provides valuable insight, using VCDS diagnostic tools in Norwich can provide accurate fault codes and ensure a precise diagnosis before undertaking any repairs. A professional mechanic equipped with VCDS in Norwich can efficiently diagnose and resolve complex car issues.
