(22R - Toyota 4-Runner 1985 Repair Manual

Problem
Engine overheats
Problem
Engine will not crank
or cranks slowly
Engine will not start/
Hard to start
(cranks OK)
Problem
Rough idle or stalls
ENGINE MECHANICAL -
Troubleshooting
TROUBLESHOOTING (22R)
ENGINE OVERHEATING
Possible cause Remedy
Cooling system faulty Troubleshoot cooling system
Incorrect ignition timing Reset timing
HARD STARTING
Possible cause Remedy
Starting system faulty Troubleshoot starting system
No fuel supply to carburetor Troubleshoot fuel system
Carburetor problems Repair as necessary
• Choke operating
• Flooding
• Needle valve sticking or clogged
• Vacuum hose disconnected or
damaged
• Fuel cut solenoid valve not open
• Secondary throttle valve not
close
Ignition problems
Perform spark test
• Ignition coil
Inspect coil
• Igniter
Inspect igniter
• Distributor
Inspect distributor
Spark plugs faulty Inspect plugs
Ignition wiring disconnected or broken
Inspect wiring
Vacuum leaks Repair as necessary
• PCV line
• EGR line
• MC line
• Intake manifold
• CMH
Compression low C hek compression
ROUGH IDLING
Possible cause
Remedy
Spark plugs faulty Inspect plugs
Ignition wiring faulty Inspect wiring
Vacuum leaks Repair as necessary
• PCV line
• Me line
• EGR line
• Intake manifold
• HAC line
• CMH
Incorrect ignition timing
Reset timing
Ignition problems Perform spark test
• Ignition coil
Inspect coil
• Igniter
Inspect igniter
• Distributor
Inspect distributor
EM-5
Page
CO-2
IG-10
Page
ST-2
FU-2
FU-4
IG-4
IG-5,7
IG-6,8
IG-9, 1 0
IG-4
IG-4
EM-11
Page
IG-4
IG-4
IG-10
IG-4
IG-5,7
IG-6,8
IG-9, 1 0