Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1995 Acura NSX AutomaticFACTORY OEM SERVICE PROCEDURE
Fuel Pressure
WARNING:
DO NOT smoke during the test, Keep open flames away from your work area.
- Relieve fuel pressure. See FUEL SYSTEM PRESSURE RELEASE .
- Remove the service bolt on the fuel filter while holding the banjo bolt with another wrench. Attach a pressure gauge to the service port of the fuel filter. See Fig 1 .
- Start the engine, measure the fuel pressure with the engine idling and vacuum hose of the pressure regulator disconnected and pinched. If the engine will not start, turn the ignition switch to ON for two seconds, turn the ignition to OFF, then back to ON again and check the fuel pressure.
- Pressure should be 47-53 psi (323-363 kPa).
- Reconnect the vacuum hose to the pressure regulator. Pressure should be 36-44 psi (250-304 kPa).
- Check that the fuel pressure rises when the vacuum hose from the regulator is disconnected again.
- If pressure is not as specified, check fuel pump first. See FUEL PUMP OPERATION . If fuel pump tests good and fuel pressure is too high, check for pinched or clogged fuel return hose or piping, or faulty fuel pump relay. See FUEL PUMP CONTROL CIRCUIT . If fuel pressure is too low, check for clogging in the fuel filter, leakage, fault fuel pump or faulty fuel pump relay. If pressure is not as specified, fuel pump relay tests good and there is no clogging or leakage, replace the fuel pressure regulator. See FUEL SYSTEM in 1995-99 REMOVAL, OVERHAUL & INSTALLATION -- NSX & NSX article.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.