Mitsubishi Eclipse 1990 Service Manual page 502

Symptom
Fuel pressure too low
No fuel pressure in fuel return
hose
Fuel pressure too high
Symptom
Fuel pressure drops gradually after
engine is stopped
Fuel pressure drops sharply
ately after engine is stopped
ENGINE
6. If
Probable cause
Clogged fuel filter
Fuel leaking return side due to poor
fuel regulator valve seating or settled
spring
Low fuel pump delivery pressure
Binding valve in fuel pressure
regulator
Clogged fuel return hose or pipe
7. the scan tool, with 'the
8. Turn the ignition switch off and
'gauge reading.
within 2 minutes!
and troubleshoot and repair-according
Probable cause
Leaky injector
Leaky fuel regulator valve seat
Checkvalve in fuel pump is held open
9. Remove fuel pressure gauge and reinstall protective cover
fuel rail service
onto
TSB Revision
is not correct, troubleshoot and repair
to the table
Remedy
Replace fuel filter
Replace fuel pressure regulator
Replace fuel pump
fuel
Clean or replace
the "Fuel System
Normal
it does, observe the rate
Remedy
Replace injector
Replace fuel pressure regulator
Replace fuel pump
valve.
.
or 'pipe
position,
,
does
table