Chabter 4 Fuel and exhaust svstems
MD998700
Fuel pressure
.-----gauge
O-ring or
gasket
3.13a To disconnect the fuel 3.13b To disconnect the fuel
high-pressure hose flange from a 2.4L
high-pressure hose flange from a 3.OL
engine, remove these two bolts (arrows) engine, remove these two bolts (arrow)
3.14a To measure the fuel pressure on
a fuel-injected engine, attach a fuel
pressure gauge to the special adapter
(MD998700 or equivalent) - be sure to
seal the two parts with an O-ring or
gasket as shown
/ I
MD998700
3.14b On 3.OL engines, you’ll also need
to attach a special hose (MD998753 or
equivalent) to the adapter as shown - be
sure to seal both hose flanges with
O-rings or gaskets as shown
3.18a Fuel pressure regulator/vacuum
hose (2.4L engine) (arrow)
3.18b Fuel pressure regulator/vacuum
hose (3.OL engine) (arrow)
Symptom
Fuel pressure is lower than
standard value
Fuel pressure is higher than
standard value
Fuel pressure does not vary
even if the vacuum hose is
conoected
Probable cause
,Remedy
Clogged fuel strainer
Replace fuel strainer
Faulty pressure regulator
Faulty fuel pump
Faulty pressure regulator
Replace pressure regulator
Replace fuel pump =
Replace pressure regulator
Clogged fuel return hose or pipe
] Clean or replace hose or pipe
Leakage. around vacuum hose
Replace the vacuum hose
3.22 Fuel pressure troubleshooting table for fuel-injected engines
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