Pontiac Fiero 1988 Service Manual page 606

DRIVEABILITY AND EMISSIONS - FUEL INJECTION (PORT) 6E3-A-23
I
NOTICE-
EFI SYSTEM UNDER
PRESSURE.
TO A VOID
FUEL
i SPILLAGE, REFER TO FIELD SERVICE PROCEDURES FOR
! TESTING OR MAKING REPAIRS REQUIRING DISASSEMBL Y OF
! FUEL LINES OR FITTINGS.
CHART A-7
(Page 4 of 4)
FUEL SYSTEM DIAGNOSIS
2.8L "P" SERIES (PORT)
©
©
F R O M C H A R T
A - 7
( P A G E 1 O F 4 )
H A S P R E S S U R E B U T L E S S
T H A N 2 8 0 K P A ( 4 0 P S I )
C H E C K F O R R E S T R I C T E D F U E L L I N E S
O R I N - L I N E F I L T E R .
©
O K
1
N O T O K
Z t Z Z
R E P L A C E F I L T E R O R
R E P A I R F U E L L I N E
A N D R E C H E C K
I G N I T I O N " O F F " .
B L O C K F U E L R E T U R N L I N E .
A P P L Y 1 2 V O L T S T O F U E L P U M P R E L A Y
H A R N E S S T E R M I N A L " B " O R A L D L F U E L
P U M P T E S T T E R M I N A L " G " A N D N O T E
P R E S S U R E .
A B O V E 3 2 5 K P A
( 4 7 P S I ) .
P R E S S U R E B U T L E S S
T H A N 2 8 0 K P A ( 4 0 P S I ) .
R E P L A C E P R E S S U R E
R E G U L A T O R
A S S E M B L Y .
F A U L T Y I N - T A N K
• F U E L P U M P
• C O U P L I N G H O S E O R
P U L S A T O R
• I N L E T F I L T E R
• W R O N G F U E L P U M P
1
A B O V E 3 2 5 K P A ( 4 7 P S I ) .
D I S C O N N E C T F U E L R E T U R N L I N E F L E X I B L E H O S E .
A T T A C H 5 /
1 6
|.D. F L E X H O S E T O P R E S S U R E R E G U L A T O R
S I D E O F R E T U R N L I N E . I N S E R T T H E O T H E R E N D I N A N
A P P R O V E D G A S O L I N E C O N T A I N E R .
N O T E F U E L P R E S S U R E W I T H I N 2 S E C O N D S A F T E R
I G N I T I O N " O N " .
A B O V E 3 2 5 K P A ( 4 7 P S I ) 2 8 0 - 3 2 5 KPA ( 4 0 . 5 - 4 7 P S I )
C H E C K F O R R E S T R I C T E D
F U E L R E T U R N L I N E F R O M
F U E L P R E S S U R E
R E G U L A T O R T O P O I N T
W H E R E F U E L L I N E W A S
D I S C O N N E C T E D .
L O C A T E A N D C O R R E C T
R E S T R I C T E D F U E L R E T U R N
L I N E T O F U E L T A N K .
IF L I N E O K R E P L A C E
P R E S S U R E R E G U L A T O R
A S S E M B L Y .
5 - 5 - 8 6
C L E A R C O D E S A N D C O N F I R M " C L O S E D L O O P " OPERATION A N D N O " S E R V I C E E N G I N E S O O N " L I G H T . *
5 S 1 9 0 5
.
6 E