Motorsport Auto

You can choose a Z-Car from your garage, or from the selections above, to filter the store or check part fitment.

Part #:11-3423

Price: $86.95

Includes:

(1) Fuel Pressure Regulator

Description:
The fuel pressure regulator has a simple task: maintain proper fuel pressure relative to engine speed when the car is running. Earlier Z-Car regulators are vacuum operated, which essentially allows the engine itself to adjust and maintain fuel pressure based on engine speed. Vacuum operated regulators can fail in a variety of ways, leading to different symptoms depending on the specific situation.

If your engine is running rich, it could be that the fuel return side of the regulator is clogged or damaged, resulting in higher pressure at the injectors. A regulator that is stuck in the closed position will also cause a rich condition in a similar way. The diaphragm can also rupture, leading to fuel being drawn through the vacuum line to the intake manifold. If the engine is running rich enough, you may see black, sooty smoke along with the exhaust. On the other side, you may run into a lean condition if the regulator is stuck open or damaged internally. This can show up as hard starting or stumbling at certain engine speeds.

As a critical component to engine operation, the regulator should be inspected or tested if symptoms appear, then replaced if needed. This quality valve is a great replacement for the original. Don't forget to inspect the fuel and vacuum lines and replace them if needed!

Model Guide:
Nissan 300ZX

Code Guide:
Nissan Z32

Year Guide:
1990, 1991, 1992, 1993, 1994, 1995, 1996