Toyota Celica 2000 Repair Manual page 7

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Table of Contents

ENGINE MECHANICAL

troubleshoot in the order given below.

•lnco1rect timing

• Open or crossed high--tension cords

• Fouled, shorted or improperly gapped plugs

1 Vacuum leaks:

(Fluctuatir�g HC reading)

•Intake manifold

• Throttle body

• Brake booster Iitle

1. Restricted air lift e r

(Black smoke !rom exhaust)

• Faulty pressure regulator

• Defective ECT sensor

• F<>ulty injectors

Faulty throtHe position sensor

concentration does not comply with regulations,

Check heated oxygen sensor operation (See page

See the table below for possible causes, and then

inspect and correct the applicable causes if neces

Faulty ignitior�s:

leaky ir�take ar�d e�haust Vlllves

lell/<. y cylir�ders

Lear� mixture causi��g mislile

Plugged PCV valve

Troubleshooting