90-824052R3 JUNE 2002 FUEL SYSTEMS - 3D-35
NOTE: Switch box panel and lube alert control box
may have to be shifted to the side to allow bleed fitting
connection. Ground boxes to engine as required.
a
a
a
50342
a - Bleed Line Fittings (Inject fuel at this location)
Results: If RPM increase occurs while injecting fuel
into disabled cylinder, clogged injector filter or
defective injector may be the problem. Per-
form Induction Manifold Disassembly (page
3D-55) for inspection.
NOTE: Injector fuel delivery can be tested with
manifold cover removed. See Injector Operation Test
(manifold cover removed) below.
RPM does not change when injecting fuel into bleed
fittings could indicate lack of compression, damaged
reeds, end cap seals, crankcase split line seal, or
crankshaft sealing rings.
Remaining tests on EFI components may require
some EFI disassembly. See EFI System
Disassembly following.
Injector Operation Test (Manifold
Cover Removed)
Purpose: This test determines if the injectors are
actually injecting fuel into the engine at a
normal rate.
WARNING
Do not start engine with induction manifold
cover removed. Disable ignition system prior to
doing this test.
1. Remove induction manifold cover using
procedures outlined under “lnduction Manifold
Removal.”
2. Re-attach induction manifold to engine using
1/4-20 x 2-3/4″ screws.
3. Connect a jumper wire between the ECM metal
case and a good engine ground.
4. Disconnect all spark plug wires from spark plugs
and seal leads with electrical tape to prevent
sparking.
5. Put ignition key switch in “START” position.
OFF
ON
START
6. Look at injector spray pattern using an explosive
proof flashlight.
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