Rough Idling Contd

Problem

Possible cause

Remedy

Page

Rough idle, stalls or misses (Cont'd)

• Throttle body

• Brake booster line

Air suction between air flow meter and throttle body

Incorrect idle speed

Check ISC system

Fl-148, 151

Incorrect valve clearance

Adjust valve clearance

EM-11, 16

EFI system problems

Repair as necessary

Engine overheats

Check cooling system

CO-4

Low compression

Check compression

EM-25

ENGINE HESITATES/POOR ACCELERATION

Problem

Possible cause

Remedy

Page

Engine hesitates/ poor acceleration

Spark plug faulty High-tension cord faulty

Vacuum leaks

• Intake manifold

• Throttle body

• Brake booster line

Air suction between air flow meter and throttle body

Inspect plug Inspect cords Repair as necessary

Repair as necessary

IG-6, 11 IG-6, 11

Incorrect ignition timing

Reset timing

IG-17, 22

Incorrect valve clearance

Adjust valve clearance

EM-11, 16

Fuel system clogged

Check fuel system

Air cleaner clogged

Check air cleaner

MA-4

EFI system probles

Repair as necessary

Emission control system problem (cold engine)

• EGR system always on

Check EGR system

EC-8, 24

Engine overheats

Check cooling system

CO-4

Low compression

Check compression

EM-25

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