IGNITION
Page 2A-18 90-855347R1 JANUARY 1999
DFI Troubleshooting Guide (continued)
Symptom Cause Action
7. Speed Reduction (RPM
reduced or limited to 3000)
7.1 Low battery voltage
ECM requires 8 volts minimum
Fuel Pump requires 9 volts
Check battery and/or alternator.
Check electrical connections.
7.2 Overheat condition (engine
and/or air compressor)
Check water pump impeller/cooling
system.
7.3 Oil pump electrical failure Check electrical connection.
7.4 TPS failure
If one (1) TPS fails rpm is
reduced to 3,000. If both TPSs
fail, rpm is reduced to idle
Check electrical connections.
8. Engine RPM reduced to
idle only
8.1 Both TPSs failed
8.2 Battery voltage below 9.5 volts
See 2.4
Use DDT or volt meter to check
battery voltage
9. Loss of spark on 1 cylin-
der
9.1 Loose wire or pin in connectors
between ECM and coil primary.
9.2 Faulty ignition coil.
9.3 Faulty spark plug.
9.4 Faulty spark plug wire
Note: Due to the long spark dura-
tion of this ignition system, the
DDT may indicate the incorrect cyl-
inder as having an ignition fault.
Example: If the DDT indicates an
ignition fault on cylinder #4, the
problem may be on the prior cylin-
der in the firing order – I.E. cylinder
number #3.
Check connectors.
Replace coil.
Replace spark plug.
Replace spark plug wire.
Ignition Components Removal and Installation
Flywheel Cover Removal and Installation
REMOVAL
Remove flywheel cover by lifting off. Disconnect the vent hose.
a
a-Vent Hose
INSTALLATION
Install flywheel cover as follows:
a. Place cover onto the front flange.
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