90-823225--1 1096
5E-62 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
Multi-Port Injection Fuel System Diagnosis
Chart A-7 (1 of 6)
SCHRADER
VALVE
CONNECT
FUEL
PRESSURE
GUAGE
HERE
FUEL INLET
PORT FUEL RAIL
STARBOARD FUEL RAIL
LATER STYLE (MCM & MIE) FUEL LINE ROUTING
(BLACK SCORPION FUEL INLET IS
LOCATED ON THE REAR OF STARBOARD FUEL RAIL)
SCHRADER
VALVE
CONNECT
FUEL
PRESSURE
GUAGE
HERE
FUEL INLET
STARBOARD FUEL RAIL
PORT FUEL RAIL
FUEL RETURN
EARLIER STYLE (MCM & MIE) FUEL LINE ROUTING
CIRCUIT DESCRIPTION:
During engine cranking, the Engine Control Module
(ECM) will turn ON the electric fuel pump in the vapor
separator tank. It will remain ON as long as the en-
gine is cranking or running, and the ECM is receiving
reference pulses. If there are no reference pulses,
the ECM will shut OFF the fuel pump.
The pump will deliver fuel to the fuel rail and injectors,
then to the pressure regulator, where the system
pressure is controlled to about 36 PSI (248 kPa)
nominal. Excess fuel is then returned to the vapor
separator tank.
TEST DESCRIPTION:
Number(s) below refer to circled number(s) on the
diagnostic chart.
1. If pump does not run check fuel pump relay and
fuse.
2. Wrap a shop towel around the fuel pressure con-
nector to absorb any small amount of fuel leak-
age that may occur when installing the gauge.
Ignition ON. This pressure is controlled by spring
pressure within the regulator assembly.
3. When the engine is idling, high vacuum is applied
to the fuel regulator diaphragm. This will offset
the spring and result in a lower fuel pressure. This
idle vacuum will vary somewhat depending on
barometric pressure; however, the fuel pressure
at idle should be less, indicating fuel pressure
regulator control.
4. Pressure that leaks down is caused by one of the
following:
•
Fuel pressure regulator valve leaking.
•
Injector(s) sticking open.
•
Check vent line from VST to see if diaphragm
is leaking.
5. If an injector is stuck open, it will send fuel to its
respective cylinder, which may saturate or foul
spark plug(s). In order to determine which injec-
tor is leaking, the spark plugs must be removed
and inspected for fouling or saturation. Once the
saturated spark plug(s) is found, replace the cor-
responding injector(s) and install new spark
plug(s).
FUEL PRESSURE
Description
Specification
Multi-Port Fuel Injection
With Vapor Separator
Tank
43 PSI (206 kPa)
Multi-Port Injection With
Cool Fuel System
30 PSI (296 kPa)
Содержание 305 CID
Страница 7: ...A 1 72000 IMPORTANT INFORMATION GENERAL INFORMATION...
Страница 16: ...B 1 IMPORTANT INFORMATION MAINTENANCE...
Страница 59: ...C 1 IMPORTANT INFORMATION TROUBLESHOOTING...
Страница 92: ...A 2 72975 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES...
Страница 103: ...B 2 70246 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES WITH DRIVESHAFT EXTENSION...
Страница 120: ...2 72580 C REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES...
Страница 135: ...D 2 70246 REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES WITH DRIVESHAFT EXTENSION...
Страница 154: ...E 2 70648 REMOVAL AND INSTALLATION MIE MODELS VELVET DRIVE TRANSMISSIONS...
Страница 173: ...F 2 25280 REMOVAL AND INSTALLATION MIE MODELS HURTH TRANSMISSIONS...
Страница 189: ...A 3 72615 ENGINE 5 0L 305 CID 5 7L 350 CID...
Страница 192: ...3A 0 ENGINES 90 823225 1 1096...
Страница 266: ...ELECTRICAL SYSTEMS STARTING SYSTEM A 72079 4...
Страница 284: ...STARTING SYSTEM 4A 17 90 823225 1 1096 THIS PAGE IS INTENTIONALLY BLANK...
Страница 308: ...B 4 72722 90 823224 692 4B IGNITION SYSTEM ELECTRICAL SYSTEMS THUNDERBOLT IV AND V IGNITION SYSTEM...
Страница 334: ...C 4 72078 ELECTRICAL SYSTEM CHARGING SYSTEM...
Страница 344: ...CHARGING SYSTEM 4C 9 90 823225 1 1096 THIS PAGE IS INTENTIONALLY BLANK...
Страница 360: ...D 4 72747 ELECTRICAL SYSTEM INSTRUMENTATION...
Страница 380: ...E 4 72761 ELECTRICAL SYSTEM ELECTRICAL KITS...
Страница 393: ...F 4 72938 ELECTRICAL SYSTEMS WIRING DIAGRAMS...
Страница 427: ...A 5 50830 90 823224 692 5A FUEL DELIVERY SYSTEMS AND FUEL PUMPS FUEL SYSTEM FUEL DELIVERY SYSTEMS AND FUEL PUMPS...
Страница 438: ...B 5 72681 FUEL SYSTEM MERCARB 2 BARREL CARBURETOR...
Страница 467: ...C 5 72085 FUEL SYSTEMS ROCHESTER 4 BARREL CARBURETOR...
Страница 497: ...D 5 70389 90 823224 692 5B WEBER 4 BARREL CARBURETOR FUEL SYSTEMS WEBER 4 BARREL CARBURETOR...
Страница 538: ...5 71692 E FUEL SYSTEMS MULTI PORT AND THROTTLE BODY FUEL INJECTION...
Страница 541: ...90 823225 1 1096 5E 0 ELECTRONIC FUEL INJECTION MULTI PORT AND THROTTLE BODY THIS PAGE IS INTENTIONALLY BLANK...
Страница 558: ...ELECTRONIC FUEL INJECTION MULTI PORT AND THROTTLE BODY 5E 17 90 823225 1 1096 THIS PAGE IS INTENTIONALLY BLANK...
Страница 591: ...90 823225 1 1096 5E 50 ELECTRONIC FUEL INJECTION MULTI PORT AND THROTTLE BODY THIS PAGE IS INTENTIONALLY BLANK...
Страница 727: ...F 5 73662 FUEL SYSTEMS BOS SAV EMISSIONS...
Страница 744: ...A 6 22381 COOLING SYSTEM SEAWATER COOLING MODELS...
Страница 773: ...B 6 72987 COOLING SYSTEM CLOSED COOLED MODELS...
Страница 823: ...A 7 72699 EXHAUST SYSTEM GENERAL...
Страница 828: ...THIS PAGE IS INTENTIONALLY BLANK TO ALLOW FOR CORRECTIONS OR ADDITIONS AT A LATER DATE 7A 4 GENERAL 90 823225 1 1096...
Страница 829: ...B 7 72695 EXHAUST SYSTEM MANIFOLDS AND ELBOWS...
Страница 835: ...C 7 70593 EXHAUST SYSTEM RISERS...
Страница 843: ...THIS PAGE IS INTENTIONALLY BLANK TO ALLOW FOR CORRECTIONS OR ADDITIONS AT A LATER DATE RISERS 7C 7 90 823225 1 1096...
Страница 844: ...D 7 72737 EXHAUST SYSTEM COLLECTORS...
Страница 855: ...THIS PAGE IS INTENTIONALLY BLANK TO ALLOW FOR CORRECTIONS OR ADDITIONS AT A LATER DATE 7D 10 COLLECTORS 90 823225 1 1096...
Страница 856: ...A 8 DRIVES VELVET DRIVE IN LINE TRANSMISSION...
Страница 869: ...B 8 DRIVES VELVET DRIVE V DRIVE AND WALTER V DRIVE TRANSMISSION...
Страница 882: ...C 8 25280 DRIVES HURTH DOWN ANGLE TRANSMISSION...
Страница 932: ...E 8 DRIVES DRIVE SHAFT PROPELLER SHAFT MODELS...
Страница 947: ...A 9 72951 POWER STEERING PUMP...