Honda Acura NSX 1991 Service Manual page 264

Fuel Supply System
Inspection
1 . Relieve fuel pressure (page 1 I-87).
Remove the service bolt on the fuel filter while
2.
holding the banjo bolt with another wrench and at-
tach the fuel pressure gauge.
Start the engine. measure the fuel pressure with
3 .
the engine idling and vacuum hose of the pressure
regulator disconnected.
Pressure should be:
323-363 kPa (3.30-3.70 kglcmz,
Reconnect vacuum hose to the pressure regulator.
4 .
Pressure should be:
250-304 kPa (2.55-3.10 kg/cm2,
PRESSURE
REGULATOR
I I - 8 8
46-53 psi)
36-44 psi)
FUEL PRESSURE GAUGE
fuel pump (page 1 l-99). If the pump is OK, check
the following:
If the pressure is higher than specified, inspect for:
Pinched or clogged fuel return hose or piping.
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Faulty pressure regulator (page 1 I-95).
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If the pressure is lower than specified, inspect for:
Clogged fuel filter.
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Pressure regulator failure (page 1 l-95).
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Leakage in the fuel line.
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