Precautions; Troubleshooting - Toyota 4-Runner 1985 Repair Manual

IG-2
Tachometer
Tachometer
Problem
Engine will not start/
Hard to start
(cranks ok)
Rough idle or stalls
Engine hesitates/
Poor acceleration
Engine dieseling (for. carb.)
(runs after ignition
switch is turned off)
Muffler explosion
(after fire) all the time
Engine backfires
Poor gasoline mileage
Engine overheats
IGNITION SYSTEM - Precautions, Troubleshooting
22R-E
PRECAUTIONS
1 . Do not allow the ignition switch to be ON for more til
10 minutes if the engine will not start.
2. As some tachometers are not compatible with this ignition
system, it is recommended that you consult with the
manufacturer.
3.
NEVER allow the ignition coil terminals to touch ground as
it could result in damage to the igniter and/or ignition coil.
22R
4. Do not disconnect the battery when the engine is running.
5. Make sure that the igniter is properly grounded to the body.
6. When a tachometer is connected to the system, connect
the tachometer test probe to the ignition coil negative
terminal.
TROUBLESHOOTING
Possible cause Remedy Page
Ignition problems
Perform spark test IG-4
•
Ignition coil Inspect coil
IG-5,7
•
Igniter Inspect igniter IG-6,8
•
Distributor Inspect distributor IG-9,10
Spark plugs faulty Inspect plugs IG-4
Ignition wiring disconnected or broken Inspect wiring IG-4
Spark plugs faulty Inspect plugs IG-4
Ignition wiring faulty Inspect wiring IG-4
Incorrect ignition timing Reset timing IG-10
Ignition problems Perform spark test IG-4
•
Ignition coil Inspect coil IG-5,7
•
Igniter Inspect igniter IG-6,8
•
Distributor Inspect distributor IG-9,10
Spark plugs faulty Inspect plugs IG-4
Ignition wiring faulty Inspect wiring IG-4
Incorrect ignition timing Reset timing IG-10
Fuel cut system faulty Repair fuel cut system
Incorrect ignition timing Reset timing
IG-10
Incorrect ignition timing Reset timing IG-10
Spark plugs faulty
Inspect plugs IG-4
Incorrect ignition timing Reset timing IG-10
Incorrect ignition timing
Reset timing IG-10