Fuel Pressure - Honda Prelude 1993 Service Manual

Fuel Supply System
System Description
The tuel supply system consists of a Juel tank, in-tank
high pressure fuel pump, PGM-Fl main relay, fuel filter,
fuel pressure regulator, fuel injectors, injector resistor,
and Juel delivery and return pipes and hoses.
This system delivers pressure-regulated fuel to the fuel
iniectors and cuts the fuel delivery when the engine is
not running.
Relieving
@
Fuel Pressure
a Do not smoke while working on the fu6l syst€m.
Keep open llames or sparks away ftom your work
alea.
a Be sure to relieve luel pressule while the €ngins is off.
NOTE: Before disconnecting luel pipes or hoses, release
pressure from the system by loosening the 6 mm serv-
ice bolt on top of the fuel rail.
1. Disconnect the battery negative cable from the bat-
tery negative terminal.
NOTE: The radio may have a coded thett protection
circuit. Be sure you get the customer's code num-
ber before disconnecting the battery cable.
2. Remove the fuel fill caD.
3. Use a box end wrench on the 6 mm service bolt at
the fuel rail, while holding the special banjo bolt with
another wrench.
4. Place a rag or shop towel over the 6 mm service bolt.
5. Slowly loosen the 6 mm service bolt one complete
turn.
N O T E :
a A fuel pressure gauge can be attached at the 6
mm service bolt hole.
a Always replace the washer between the service
bolt and the special banjo bolt, whenever the serv-
ice bolt is loosened.
a Replace all washers whenever the bolts are
removed.
1 1 - 1 1 4
12 N.m {1.2 kg-m, 9 lb-ft)