Toyota 4-Runner 1985 Repair Manual page 37

EM-8
ENGINE MECHANICAL -
Troubleshooting
POOR FUEL MILEAGE
,
Problem
Possible cause Remedy Page
Poor fuel mileage Fuel leak Repair as necessary
Air filter clogged Check air filter
MA-5
Incorrect ignition timing Reset timing
IG-10
Carburetor problems Perform on-vehicle FU-4
• Choke system faulty
inspection of carburetor
• Idle speed too high
• Deceleration fuel cut system
faulty
• Power valve always open
Spark plugs faulty Inspect plugs Inspect plugs IG-4
EGR system always on
Check EGR system
EC-30
Compression low
Check compression EM-11
Tires improperly inflated
Inflate tires to proper pressure FA-3
Clutch slips
Troubleshoot clutch CL-2
Brakes drag
Troubleshoot brakes BR-2