Celica GT L4-1.8L (1ZZ-FE) (2001)
Required Tools & Equipment
Inspection Procedure
NOTE:
The vehicle MUST be diagnosed following a cold soak. If the vehicle is at operating temperature, the condition will NOT be present.
1.
Monitor the following Data List parameter: Short FT # 1 (Short Term Fuel Trim for Bank 1).
Using TIS techstream, select:
Connect to Vehicle/Engine and ECT/Data List/Short FT # 1.
2.
Following conventional diagnostic procedure, confirm if there is a leak where the intake manifold and cylinder head meet between each intake
runner.
3.
Did the short term fuel trim change to a rich reading (negative fuel trim) in step 2?
^
If YES - Replace the intake manifold gasket.
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If NO - Check for other vacuum leaks or lean running conditions per the Technical Information System (TIS).
Repair Procedure
1.
Drain the engine coolant. Refer to TIS:
^
2000, 2001, or 2002 model year Celica Repair Manual, Engine/Hybrid System - Cooling - "1ZZ-FE 2ZZ-GE: Coolant: Replacement"
^
2003, 2004, or 2005 model year Celica Repair Manual, Engine/Hybrid System - Cooling - "Coolant: Replacement"
2.
Remove the air cleaner assembly.
3.
Disconnect the accelerator cable.
4.
Remove the intake manifold.