Multi-Port 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 38 PSI (262 kPa)
HAS PRESSURE, BUT LESS
THAN 34 PSI (234 kPa)
3
•
•
DISCONNECT FUEL RETURN LINE.
FOLLOWING MANUFACTURER’S INSTRUCTIONS, ATTACH
FLEX HOSE TO RETURN LINE. INSERT THE OTHER END IN AN
APPROVED GASOLINE CONTAINER. NOTE FUEL PRESSURE
CHECK FOR RESTRICTED
FUEL LINES.
WITHIN 2 SECONDS AFTER IGNITION IS TURNED “ON.”
OK
NOT OK
ABOVE 38 PSI (262 kPa)
34-38 PSI (234-262 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
RESTRICTED FUEL RETURN
LINE TO VAPOR SEPARATOR
TANK.
2
•
•
IGNITION “OFF.”
BLOCK FUEL RETURN LINE FOLLOWING
INSTRUCTIONS.
•
CYCLE IGNITION “ON.” PRESSURE
SHOULD RISE ABOVE 38 PSI (262 kPa).
IF LINE OK, REPLACE FUEL
PRESSURE REGULATOR.
HAS PRESSURE, BUT LESS
THAN 34 PSI (234 kPa)
ABOVE 38 PSI
(262
kPa)
FAULTY
FUEL PUMP
FAULTY PRESSURE
REGULATOR.
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-63
| 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 |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
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