fuel ACURA TL 1995 Service Owner's Manual

Fuel Supply System

Fuel Injectors (cont'd)

'97 - 98 models:

ENGINE

COVER

HARNESS

HOLDER

O-RING

Replace.

CUSHION

RING

Replace.

FUEL

INJECTOR

SEAL

RING

Replace.

9. Slide new cushion rings onto the fuel injectors.

10. Coat new O-rings with clean engine oil, and put them on the fuel injectors.

11. Insert the fuel injectors into the fuel rail first.

12. Coat new seal rings with clean engine oil and press them into the intake manifold.

13. Install the fuel injectors and fuel rail assembly in the intake manifold.

CAUTION: To prevent damage to the O-ring, install the fuel injectors in the fuel rail first, then install them in the

intake manifold.
22 N-m

(2.2 kgf-m,

16 Ibf-ft)

PCV

VALVE

FUEL

RAILS
12 N-m

(1.2 kgf-m,'

8.7 Ibf-ft)ProCarManuals.com

14. Align the center line on the connector with the mark on the fuel rail.

15. Install and tighten the retainer nuts.

16. Connect the fuel hose to the fuel rail.

17. Connect the vacuum hose and fuel return hose to the fuel pressure regulator.

18. Install the connectors on the fuel injectors.

19. Install the engine cover.

20. Turn the ignition switch ON (ll) but do not operate the starter. After the fuel pump runs for approximately two seconds,

the fuel pressure in the fuel line rises. Repeat this two or three times, then check whether there is any fuel leakage.
FUEL

INJECTOR
MARKINGS
FUEL

RAIL
FUEL RAIL

INSULATOR
FUEL

RAILSProCarManuals.com

Fuel Suppl y Syste m
Fuel Pressur e Regulato r
Descriptio n
Th e fue l pressur e regulato r maintain s a constan t fue l pres -
sur e to th e fue l injectors . Whe n th e differenc e betwee n th e
fue l pressur e an d manifol d pressur e exceed s 25 0 kP a
(2.5 5 kgf/cm
2, 36. 3 psi) , th e diaphrag m is pushe d
upward , an d th e exces s fue l i s fe d bac k int o th e fue l tan k
throug h th e retur n line .
CLOSED :
INTAKE MANIFOL DVACUUM
DIAPHRAG M
FUELINLE T
OPEN :INTAK E MANIFOL DVACUUM
FUEL RETUR N DIAPHRAG
M
FUE L
INLE T
Testin g
Do no t smok e durin g th e test . Kee p ope n
flame s awa y fro m you r wor k area .
1 . Attac h th e specia l too l t o th e servic e por t o n th e fue l
rai l ('9 7 - 9 8 models : fue l filter ) (se e pag e 11-120 ).
2 . Star t th e engine .
Pressur e shoul d be :
26 0 - 31 0 kP a (2.6 5 - 3.1 5 kgf/cm
2, 3 8 - 4 5 psi )
(wit h th e fue l pressur e regulato r vacuu m hos e dis -
connecte d an d pinched )
'9 6 model :
FUELPRESSUR EGAUGE07406 - 0040001
CLAMP FUE
LPRESSUR EREGULATO R
'97 - 9 8 models :
FUELPRESSUR EREGULATO R FUE
L
PRESSUR E
GAUG E
07406 - 004000 1
FUELFILTE R
3. Reconnec t th e vacuu m hos e t o th e fue l pressur e
regulator .
4 . Chec k tha t th e fue l pressur e rise s whe n th e vacuu m
hos e fro m th e fue l pressur e regulato r i s disconnecte d
again . I f th e fue l pressur e di d no t rise , replac e th e
fue l pressur e regulator .
CLAMP
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Troubleshooting Flowchar t
No. 1 VACUU MHOSEVACUU M
PUMP/GAUG E
A973 X - 04 1 - XXXX X
FUELPRESSUR EREGULATO R
Is ther e manifol d vacuum ?
Is ther e vacuum ?
Chec k th e Fue l Pressur e Regula -
to r Contro l Solenoi d Valve :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e 4 P connecto r
fro m th e contro l box .
3 . Connec t batter y positiv e t o
termina l No . 4 an d batter y
negativ e t o termina l No . 3 on
th e 4 P connector .
4 . Star t th e engin e an d allo w it
to idle .
Chec k th e No . 1 an d No . 3 vacu -
u m hose .
I f hose s ar e OK , replac e th e fue l
pressur e regulato r contro l sole -
noi d valve .
Inspec t fo r a shor t t o groun d in
wir e betwee n PC M (A10 ) an d th e
4P connector .If th e wir e i s OK , substitut e a
known-goo d PC M an d recheck . I f
sympto m goe s away , replac e th e
origina l PCM .
CONTRO L BO X4P CONNECTO R (C218 )
I s ther e manifol d vacuum ? Replac
e th e fue l pressur e regula -
to r contro l solenoi d valve . Termina
l sid e o f mal e
terminal s
(T o pag e 11-126 ) Disconnec
t th e 4 P connecto r
fro m th e contro l box .
Chec
k fo r vacuu m at idle :
1 . Star t th e engine . Hol d th e
engin e a t 3,00 0 rp m wit h n o
loa d (transmissio n in o r
position ) unti l th e radiato r fa n
come s on .
2 . Disconnec t th e No . 1 vacuu m
hos e fro m th e fue l pressur e
regulato r an d connec t a vac -
uu m gaug e to th e hose .
Inspectio
n o f Fue l Pressur e
Regulato r Contro l Solenoi d Valve .
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Fuel Suppl y Syste m
Fuel Pressur e Regulato r (cont'd )
(From pag e 11-125 )
Chec k fo r a n ope n in th e wire :
Measur e voltag e betwee n th e
contro l bo x 4 P connecto r termi -
na l No . 4 an d bod y ground .
I s ther e batter y voltage ?
Chec k fo r a n ope n in th e wire :
1 . Tur n th e ignitio n switc h OFF .
2 . Reconnec t th e 4 P connecto r
t o th e contro l box .
3 . Star t th e engin e an d allo w it
to idle .4. Connec t PC M connecto r ter -
mina l A1 0 an d bod y groun d
with a jumpe r wire .
Is ther e manifol d vacuum ? CONTRO
L BO X
4 P CONNECTO R (C218 )
Repai r ope n i n wir e betwee n
No. 4 EC U (PCM ) (15 A ) o r (2 0 A )fus e in th e under-das h fuse/rela y
bo x an d th e 4 P connector . Wir
e sid e o f femal e terminal s
PC M CONNECTO R A (26P )
Wir e sid e o f femal e terminal s
Repai r ope n i n wir e betwee n
PC M (A10 ) an d th e 4 P connector .
Fue l Pressur e Regulato r Contro l
Solenoi d Valv e is OK .
JUMPE RWIRE
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Fuel Filte r
Replacemen t
• D o no t smok e whil e workin g o n fue l system .
Kee p ope n flam e awa y fro m you r wor k area .
• Whil e replacin g th e fue l filter , b e carefu l t o kee p a saf e
distanc e betwee n batter y terminal s an d an y tools .
Th e fue l filte r shoul d b e replace d wheneve r th e fue l pres -
sur e drop s belo w th e specifie d valu e [26 0 - 31 0 kP a
(2.6 5 - 3.1 5 kgf/cm
2, 37. 7 - 44. 8 psi ) wit h th e fue l pressur e
regulato r vacuu m hos e disconnecte d an d pinched ] afte r
makin g sur e tha t th e fue l pum p an d th e fue l pressur e
regulato r ar e OK .
1 . Mak e sur e yo u hav e th e anti-thef t cod e fo r th e radio ,
the n writ e dow n th e frequencie s fo r th e radio' s pre -
set buttons .
2. Disconnec t th e batter y negativ e cabl e fro m th e bat -
ter y negativ e terminal .
3 . Plac e a sho p towe l unde r an d aroun d th e fue l filter .
4 . Reliev e fue l pressur e (se e pag e 11-119 ).
5 . Remov e th e banj o bol t an d th e fue l fee d pip e whil e
supportin g th e fue l filte r wit h anothe r wrench , a s
shown .
6 . Remov e th e fue l filte r clam p an d fue l filter .
7 . Whe n assembling , us e ne w washer s a s shown .
NOTE : Clea n th e flare d join t o f hig h pressur e hose s
thoroughl y befor e reconnectin g them .
'96 model :
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Fuel Supply System

Fuel Filter (cont'd)

'97 - 98 models:

BANJO BOLT

22 N-m (2.2 kgf-m,

16 Ibf-ft)

WASHERS

Replace.

9.8 N-m

(1.0 kgf-m,

7.2 Ibf-ft)
37 N-m

(3.8 kgf-m,

27 Ibf-ft)ProCarManuals.com

Fuel Suppl y Syste m
Fuel Pum p
Testin g
Do no t smok e durin g th e test . Kee p ope n
flam e awa y fro m you r wor k area .
I f yo u suspec t a proble m wit h th e fue l pump , chec k tha t
th e fue l pum p actuall y runs ; whe n it i s ON , yo u wil l hea r
som e nois e i f yo u hol d you r ea r t o th e fue l fil l por t wit h
th e fue l fil l ca p removed . Th e fue l pum p shoul d ru n fo r
tw o second s whe n ignitio n switc h i s firs t turne d on . I f
th e fue l pum p doe s no t mak e noise , chec k a s follows :
1 . Remov e th e trun k floor .
2 . Disconnec t th e 3 P connector .
CAUTION : B e sur e t o tur n th e ignitio n switc h OF F
befor e disconnectin g th e wires .
3 . Disconnec t th e PGM-F I mai n rela y connecto r an d
connec t th e No . 2 termina l an d No . 5 terminal * wit h
a jumpe r wire . * : 8 P connecto r
4.
PGM-F I MAI N RELA Y CONNECTOR S
8P (C417 )
JUMPE R WIR E
Wire sid e o f femal e terminal s
Check tha t batter y voltag e i s availabl e betwee n th e
fue l uni t sub-harnes s connecto r termina l No . 3 an d
bod y groun d whe n th e ignitio n switc h is turne d O N (II) .
FUE L UNI T SUB-HARNES SCONNECTOR (C519 )
Termina l sid e o f mal e terminal s
If batter y voltag e is available , chec k th e fue l pum p
ground . I f th e groun d i s OK , replac e th e fue l
pump .
I f ther e is n o voltage , chec k th e wir e harnes s (se e
pag e 11-130 ).
4 P (C418 )
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PGM-FI Main Relay

Description

This PGM-FI main relay is located at the left side of the

cowl. The PGM-FI main relay actually contains two indi-

vidual relays. One relay is energized whenever the igni-

tion is on. It supplies battery voltage to the PCM, power

to the fuel injectors, and power for the second relay. The

second relay is energized for two seconds when the

ignition is switched on, and when the engine is running.

It supplies power to the fuel pump.

PGM-FI

MAIN RELAY

FUEL PUMP
Relay Testing

NOTE: If the car starts and continues to run, the PGM-FI

main relay is OK.

Remove the PGM-FI main relay.

Attach the battery positive terminal to the No. 3*

terminal and the battery negative terminal to the

No. 2* terminal of the PGM-FI main relay. Then

check for continuity between the No. 5* terminal and

No. 2 terminal of the PGM-FI main relay.

If there is continuity, go on to step 3.

If there is no continuity, replace the relay and

retest.

No. 4
*: 8P CONNECTOR

3. Attach the battery positive terminal to the No. 4 ter-

minal and the battery negative terminal to the No.

7* terminal of the PGM-FI main relay. Then check

that there is continuity between the No. 3 terminal

and No. 1 terminal of the PGM-FI main relay.

• If there is continuity, go on to step 4,

• If there is no continuity, replace the relay and

retest.

4. Attach the battery positive terminal to the No. 1 ter-

minal and battery negative terminal to the No. 2*

terminal of the PGM-FI main relay. Then check that

there is continuity between the No. 5* terminal and

No. 2 terminal of the PGM-FI main relay.

If there is continuity, the relay is OK;

If the fuel pump still does not work, go to

Harness Testing on the next page.

If there is no continuity, replace the relay and

retest.ProCarManuals.com

Fuel Suppl y Syste m
PGM-F I Mai n Rela y (cont'd )
Troubleshootin g Flowchar t
Engine wil l no t start .Inspectio n o f PGM-F I mai nrelay an d rela y harness .
Check fo r a n ope n in th e wir e (PG 1line) :1. Tur n th e ignitio n switc h OFF .
2 . Disconnec t th e PGM-F I mai n
rela y 4 P connecto r an d 8 P
connector .3. Chec k fo r continuit y betwee n
th e PGM-F I mai n rela y 8 P
connecto r termina l No . 7 an d
bod y ground . PGM-F
I MAI N RELA Y 8P CONNECTO R (C417 )
Wir e sid e o f femal e terminal s
I s ther e continuity ? Repai
r ope n in th e wir e betwee n
th e PGM-F I mai n rela y an d G10 1
(locate d a t righ t middl e o f
engine) .
Check fo r a n ope n o r shor t i n th e
wir e (BA T line) :
Measur e voltag e betwee n th e
PGM-F I mai n rela y 4 P connecto r
termina l No . 3 an d bod y ground . PGM-F
I MAI N RELA Y 4P CONNECTO R (C418 )
BAT(YEL /BLU)
Wire sid e o f femal e terminal s
I s ther e batter y voltage ? Repai
r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e EC U (PCM )
(2 0 A ) fuse .
Replac e th e EC U (PCM ) (2 0 A )
fus e in th e under-hoo d fuse /
relay box .
Chec k fo r a n ope n o r shor t i n th e
wir e (IGS W line) :
1 . Tur n th e ignitio n switc h O N (II) .
2 . Measur e voltag e betwee n th e
PGM-F I mai n rela y 8 P connec -
to r termina l No . 5 an d bod y
ground .
Is ther e batter y voltage ?
(T o pag e 11-131 ) Repai
r ope n o r shor t i n th e
wir e betwee n th e PGM-F I
mai n rela y an d th e No . 2 FUE L
PUM P (1 5 A ) fuse .
Replac e th e No . 2 FUE L PUM P
(15 A ) fus e i n th e under-das hfuse/relay box .
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