Jaguar Fuel Pressure Regulator - NTK AJ87977

Product Information

The Fuel Injection Pressure Regulator is a critical component of the fuel delivery system that maintains consistent fuel pressure to the injectors. It adjusts fuel flow based on engine demand by regulating excess fuel back to the fuel tank, ensuring optimal air-fuel mixture for efficient combustion. Typically mounted on the fuel rail or integrated within the fuel pump assembly, it helps improve engine performance, fuel efficiency, and emissions control.

• Poor Engine Performance – Loss of power, hesitation, or rough acceleration
• Hard Starting or No Start – Insufficient or excessive fuel pressure affecting ignition
• Engine Misfires or Rough Idle – Irregular fuel delivery disrupting combustion
• Decreased Fuel Efficiency – Excess fuel consumption due to improper pressure regulation
• Black Smoke from Exhaust – Rich fuel mixture caused by excessive fuel pressure
• Fuel Leaks or Fuel Odor – Possible diaphragm failure allowing fuel to escape
• Check Engine Light (CEL) – Triggered by abnormal fuel pressure readings

About NTK

NTK is part of the NGK product family. Whereas NGK specializes in spark plugs, NTK specializes in O2 Sensors, also known as Oxygen Sensors. In fact NTK supplies more OEM oxygen sensors to automobile makers than any other manufacturer in the world. As an OEM, all NTK products are OEM certified and are designed with the highest quality materials, so all NTK oxygen sensors meet or surpass original equipment specifications. Also, all sensors now use waterproof factory fitted connectors so expect NTK sensors to fit perfectly the first time. Placing a new NTK oxygen sensor in your vehicle will help contribute to lower emissions, improved gas mileage, better engine performance, and extend the catalyst’s life.