Edema has many possible causes: 1  Prolonged standing or sitting, especially in hot weather, can cause excess fluid to accumulate in the feet, ankles and lower legs. 2  Tiny valves inside the veins of the legs can become weakened, causing a common problem called venous insufficiency.
Cars with nitrous-equipped engines can be identified by the purge of the delivery system that most drivers perform prior to reaching the starting line. A separate electrically operated valve is used to release air and gaseous nitrous oxide trapped in the delivery system.
Steve Johnson says that long-term exposure of the nitrous solenoid seal to bottle pressure will quickly degrade the seal. Dynamic fuel pressure is the next critical tuning element. A common error nitrous users make is to assume the fuel pump can maintain the same pressure under a 200hp nitrous hit as it does at idle.