1993 NISSAN SERENA Service Repair Manual

EVAPORA'IIVE
EMISSION CONTROL SYSTEM
Inspection (Cont'd)
FUEL TANK VACUUM FELIEF VALVE
1. wp6 cl.an valv. housing.
2. Slck ar Ihbuqh lh€
cap. A
slight resislance ac@frpan ed
by va ve
clicks indicates lhat valve is in good
mechanica
@ndition. Nole rlso rrrdl. by lurh€r sLc{nq.i.. rh€
€66.
lance shoLld disapp€arwllh valve
clicks.
3. lf valv€ s cloqged or ii no resistanoe
is lelt, replace cap as
FUEL CHECK VALVE
1. Blow air lhrouoh
connectof o.lleliank side.
A 6nsid6Eble
rcsistance should be lell and a podon
olair
llow 6hou d be direcied iowad lhe €n sl6r.
2. Blow
air though connedof on €n sl€f s de.
An tlow should be smoolh y
dn€cbd loward luel
lank.
3. ll '.erch€c
vs v€ i6.urpected
ol.or p
opedy luncroli!
n step6 1
and 2 above, replace il.
EF & EC€,10

CRANKCASE
EMISSION CONTROL SYSTEM
Thissysrem rctuns
b ow-bygasb bolh lhe nlake manilotdand
The positive
cankese venliaton (P
C.V.) valv6 s provid€d
ro
@nductcrankcase blow'by gas
to th€ inlak6 man iold.
Dufng padiallhone
opealion ol lhe efglne. lhe intake man
ilold sucks lhe b ow-by gas
lhrough the P.C.V. valve.
Normally,lhe capaciq/ ol lhe valve is sufticienl lo hande any
blow-by and a smal amou.l ol ventlating an.
The ventlaiing air slhen dEwn lbm lh€ an nlerlubes,lhrough
fte hose conn€ctng an nd Iubas lo rocker
cover, i.lo lhe
Under iull-lhrctlle
coidilion, lho manilold vacuum is nsuliiclenl
lo daw lho bowby llow lhouqh lh€ valve,
and is llow goes
lhrcugh lh6 hos€ conn€ciion in lhe reveBe
dnedion.
On v6h cl€s wilh an.rc.ssiv6 y
hiqh b ow.by sone ot lhe ltow
willgolhbugh th€ hose
connection lo fie an inlel lubes und6r
Inspection
P.C,V, (PciriE
crdkes€ Ventitatbn)
Wilh enqne running al idl€, €mov€ P.C.V. valv€ lrom
ro.ker
cover il lh€ vav€ is wo*inq pope
y,
a hlssinq noise wilt be
head as aif passes
lhrough it and a sl@ngvacuum shou d be
rell imnediately
when a fngef is placed
ov€r valve inl6l.
Description
EF & EC-341

CFANKCASE
EIiIISSION CONTROL SYSTEM
lmpeclion (Confd)
VENNLAION HO€E
1 . che.i hos6 and ho* co.noctions lor leaks.
2. Disnn4l all ho$s and d@n wilh dmpGs$d air ll 5.y
hos€ e.not b€ lr€6d ot obsirucliorc. €dae.
EF & EC€42

SERVTCE
DATA AND SPECTFTCATTONS (S.D.S.)
General SDecitications
Inspeclion and Adiustment
INJECTOF RESISTOF
THROTTLE SENSOF
AIF FLOW METER
ENGINE TEMPEHATUFE
IGNITION
COIL
SENSOB
EF & EG34:}

PREPARANON
SPECIAL
Adlusdn9 SERMCE
Tools
o
o
o tr
U
rA
EF & EC€,14

PREPARATION
^qdns&edFlmPlab EF & EC€,15

PREPAMTION
o o
@
o o
a =<
{a
EF & EC-34{;

INJECNON
SYSTEM
. Dlsmbly
.fi1 El€ffbly of ltE inj€clid punp
.hould
b6 don6 dly in 8db.
.hoF .u|iodad by NISSAN q
by
lhe pqmp
runuf.clqei
. the punp
lesls b 6qul6d lor $Mchg rh. p!np.
. B.ioc
€ndlng nd inj.Etih punp
lrom v.hicL,
cl|Ft
d*ly to n.lc luE
that lt
la
d.inlt ly mltumdonlng
Fuel System
tK,lE: Typ. 2 l.du<16
Fuol Fotum Con|Itr
E/.r.n (ERC.S,)
EF&E_