Throttle Body Injection Fuel System Diagnosis (Continued)
Chart A-7: (4 of 6)
*
NOTE: THE IGNITION MAY HAVE TO BE CYCLED
“ON” MORE THAN ONCE TO OBTAIN MAXI-
MUM PRESSURE.
CONTINUED FROM
CHART A-7
(2
OF 6)
1
ABOVE 32 PSI (231 kPa)
HAS PRESSURE, BUT LESS
THAN 28 PSI (193 kPa)
3
•
•
DISCONNECT FUEL RETURN LINE.
ATTACH FLEX HOSE TO RETURN LINE. INSERT THE OTHER END
IN AN APPROVED GASOLINE CONTAINER. NOTE FUEL PRES
SURE WITHIN 2 SECONDS AFTER IGNITION IS TURNED “ON.”
CHECK FOR RESTRICTED
FUEL LINES.
OK
NOT OK
ABOVE 32 PSI (231 kPa)
28-32 PSI (193-231 kPa)
REPAIR FUEL LINE
AND RECHECK.
CHECK FOR RESTRICTED FUEL
RETURN LINE FROM FUEL
PRESSURE REGULATOR TO
POINT WHERE FUEL LINE WAS
DISCONNECTED.
LOCATE AND CORRECT
RESTRICTION IN WATER SEP-
ARATING FUEL FILTER
2
•
•
IGNITION “OFF.”
BLOCK FUEL RETURN LINE FOLLOWING
INSTRUCTIONS.
•
CYCLE IGNITION “ON.” PRESSURE
SHOULD RISE ABOVE 32 PSI (231 kPa).
IF LINE OK, REPLACE FUEL
PRESSURE REGULATOR.
HAS PRESSURE, BUT LESS
THAN 28 PSI (193 kPa)
ABOVE 32 PSI
(231
kPa)
FAULTY
FUEL PUMP
FAULTY PRESSURE
REGULATOR.
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-69
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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