ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5E-7190-823225--1 1096
Throttle Body Injection Fuel System Diagnosis (Continued)
Chart A-7: (4 of 6)
2
• IGNITION “OFF.”
• BLOCK FUEL RETURN LINE FOLLOWING
INSTRUCTIONS.
• CYCLE IGNITION “ON.” PRESSURE
SHOULD RISE ABOVE 32 PSI (231 kPa).
CONTINUED FROM
CHART A-7
(2 OF 6)
1
3
ABOVE 32 PSI (231 kPa)
OK NOT OK
IF LINE OK, REPLACE FUEL
PRESSURE REGULATOR.
HAS PRESSURE, BUT LESS
THAN 28 PSI (193 kPa)
CHECK FOR RESTRICTED
FUEL LINES.
ABOVE 32 PSI (231 kPa) 28-32 PSI (193-231 kPa)
CHECK FOR RESTRICTED FUEL
RETURN LINE FROM FUEL
PRESSURE REGULATOR TO
POINT WHERE FUEL LINE WAS
DISCONNECTED.
REPAIR FUEL LINE
AND RECHECK.
ABOVE 32 PSI
(231 kPa)
FAULTY PRESSURE
REGULATOR.
HAS PRESSURE, BUT LESS
THAN 28 PSI (193 kPa)
FAULTY
FUEL PUMP
• 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.”
LOCATE AND CORRECT
RESTRICTION IN WATER SEP-
ARATING FUEL FILTER
* NOTE: THE IGNITION MAY HAVE TO BE CYCLED
“ON” MORE THAN ONCE TO OBTAIN MAXI-
MUM PRESSURE.
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