Fuel Pressure Regulator - Honda Prelude 1993 Service Manual

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Fuel Supply System

Fuel Pressure Regulatol

The fuel pressure regulator maintains a constant fuel

pressure to the fuel injectors. When the difference be-

tween the luel pressure and manifold pressure exceeds

300 kpa (3.0 kg/cm' , 43 psi), the diaphragm is pushed

uDward, and the excess fuel is fed back into the fuel tank

through the return line.

INTAKE MANIFOLD

INTAKE MANIFOLD

Do not smok€ durlng tho test. K€ap

opan flames away lrom your work area.

Attach a fuel pressure gauge to the service port of

t h e f u e l r a i l ( s e e p a g e 1 1 - 1 1 5 ) .

Pressurs should be;

H23A1 engino (USA: Si/Canada: SR),

F22A1 engino (S):

255-3O5 kPa (2.55-3.05 kg/cm2,36-43 psi)

H22Al engino (USA: Si WEC/Canada: SR-VI:

23o-2ao kPa (2.3-2.8 kg/cm2. 33-4o psil

{with the fu6l pressuro logulator vacuum hose dis-

connectod and pinchedl

PRESSURE REGULATOR

2. Reconnect the vacuum hose to the fuel ptessure

3. Check that the fuel Dressure rises when the vacu-

um hose from the tuel pressure regulator is discon-

nected again.

lf the fuel pressure did not rise, replace the fuel pres-

sure regulalor.

Troubleshooting