A fuel pressure gauge is a meter that checks whether the fuel pressure is normal or not. By installing a fuel pressure gauge, it is possible to determine if the fuel pump capacity is insufficient for the injector injection volume, or if there are any problems such as fuel line leaks.
Regardless of whether it is a normal or a tuned engine, it is very important to know the condition of the fuel pump and filter on a regular basis. These days, it is not uncommon to find cars that have been players for 15 years still running on the circuit. Common problems are sudden engine stalls due to fuel pump failure or clogged filters. These problems are areas that are difficult to detect early on unless the store is experienced and knowledgeable about cars.
The differential pressure display function in the ADVANCE SYSTEM makes it easy to check the fuel pressure status as follows.
*Cautions for displaying differential pressure
In the ADVANCE SYSTEM, the fuel pressure gauge and turbo sensor must be installed in the ADVANCE Control Unit at the same time.
| Products displaying Fuel Pressure |
Defi Sports Display F ADVANCE FD (Sensors must be purchased separately) ADVANCE Pressure Gauge＜Differential pressure display＞ DIN-Gauge Racer Gauge Pressure Gauge |
|---|---|
| Display Range |
0kPa～600kPa（1kgf/cm2=98.07kPa） （DIN-Gauge、Racer Gauge：0kPa～1000kPa） |
| Guideline for Warning Point | 150kPa |
| Parts that need be purchased separately |
Hose union 3-way joint (screw size 1/8PT) Hose Bands Sealing tape |
| Recommended sensor installation position | Install on the fuel line supply side (before the high pressure side delivery pipe). |
Differential pressure is the fuel pressure minus the pressure in the manifold. Fuel pressure is judged as good or bad based on the intake pressure at 0. The fuel pressure at 0 intake pressure is called the initial value.
If the differential pressure is always more than 50 kPa below the initial value, consider checking the pump and fuel pressure regulator. In one case, when the fuel filter of a vehicle with 100,000 km was replaced with a new one, the initial fuel pressure increased by 10 kPa.
To display differential pressure, a turbo sensor and ADVANCE Control Unit are required in addition to a fuel pressure gauge. In a typical electronically controlled fuel injection-controlled vehicle, fuel pressure is controlled to be constant relative to intake air pressure by a pressure regulator.
For example, if fuel pressure is set at 300 kPa, the appropriate differential pressure range is 250 to 400 kPa as shown below.
