FU EL RAI L
DESCRIPTION
The fuel rail act s like a high pressur e stor e. It is
ava ila ble to all injectors for dra wing fuel wh ich h as
been com pr essed by t he high pressu re injection
pu mp. The ra il pressure sensor, ra il pressu re contr ol
valve, high pressure line, a nd t he ret urn flow line
are attached to the fu el rail.
OPERATION
The stored fuel volume in side the rail a cts as a
da mper for pressure fluctu ations wh ich resu lt
because of pulsating supply and brief large extrac-
tions of fuel during in jector firing. The rail primar ily
influences th e a tomizat ion of fuel at the injector noz-
zle, and the accuracy of in ject ed quantity during
injection.
REMOVAL
(Refer to 14 - FUEL SYSTEM - WARNING).
WARNING: NO SPARKS, OPEN FLAMES OR SMOK-
ING. RISK OF POISONING FROM INHALING AND
SWALLOWING FUEL. RISK OF INJURY TO EYES
AND SKIN FROM CONTACT WITH FUEL. POUR
FUELS ONLY INTO SUITABLE AND APPROPRI-
ATELY MARKED CONTAINERS. WEAR PROTECTIVE
CLOTHING.
(1) Disconn ect nega tive battery cable.
(2) Remove the engine cover.
(3) Disconn ect the intake manifold a ir inlet du ct
and posit ion aside.
(4) Disconn ect t he fuel r ail pressu re and control
valve wiring har ness connectors.
(5) Remove engine h arness r etaining bolts and
unclip th e engine har ness from th e fuel rail.
(6) Remove injector high pressure lines (Fig. 19)
(7) Remove fuel rail ret ain ing bolt s (F ig. 19).
CAUTION: When slackening and tightening fuel
injection line union nuts, counter hold with wrench
at threaded connection. ON NO ACCOUNT exceed
the tightening torque at any time. Do NOT crimp or
bend lines.
NOTE: After removing lines, seal connections and
ensure cleanliness.
(8) Detach fuel retur n flow lin e to h igh pressur e
pump at r ail
(9) Detach fuel return flow line at banjo bolt (F ig.
19)
(10) Remove fuel ra il.
INSTALLATION
(Refer to 14 - FUEL SYSTEM - WARNING)
WARNING: NO FIRE, FLAMES OR SMOKING. RISK
OF POISONING FROM INHALING OR SWALLOWING
FUEL. RISK OF INJURY TO EYES AND SKIN FROM
CONTACT WITH FUEL. POUR FUELS ONLY INTO
SUITABLE AND APPROPRIATELY MARKED CON-
TAINERS. WEAR PROTECTIVE CLOTHING.
(1) Loosely position fuel ra il into proper position
on the cylinder head an d hand t ighten the fasten ers.
(2) Connect t he fuel pressure control valve ha rness
connect or (Fig. 19).
(3) Connect th e fu el ret urn lin es at th e ba njo bolt
(Fig. 19).
CAUTION: Inspect sealing cones at the lines.
Replace as necessary. Ensure that all fuel pressure
lines are exactly located in original position.
(4) In st all the high pressur e fuel lines and h and
tighten.
Fig. 19 FUEL RAIL
1 - CAMSHAFT POSITION SENSOR
2 - FUEL INJECTOR
3 - FUEL INJECTOR VALLEY DRAIN
4 - FUEL RAIL PRESSURE CONTROL VALVE
5 - BANJO BOLT
6 - FUEL RAIL
7 - HIGH PRESSURE FUEL LINE
14 - 22 FUEL DELIVERY VA
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