Protege L4-2.0L DOHC (2003)
3. Separate the intake manifold from the dynamic chamber.
4. Inspect for missing and or loose Variable Inertia Charging System (VICS) and Variable Tumble Control System (VTCS) shutter valve screws and
or plates.
a. If any screws or plates (VICS or VTCS) are found to be missing, inspect the dynamic chamber for loose parts and inspect the intake runners in
the cylinder head to determine if the missing parts have become lodged in the head.
- If any parts are found in the dynamic chamber or the head, remove the parts using an appropriate tool, then perform a compression test to
determine if any internal engine damage has occurred (the compression test can be performed without reinstalling the intake manifold).
- If NO internal damage is indicated, proceed with the intake manifold replacement. If the compression test indicates internal damage has
occurred, contact the National Technical Hotline for instructions.
b. If no loose parts are found in the dynamic chamber or the head, then proceed to testing the compression.
NOTE: The compression test can be performed without reinstalling the intake manifold.
- If the compression test indicates NO internal damage is evident, proceed with the intake manifold replacement.
- If the compression test indicates internal damage has occurred, contact the National Technical Hotline for instructions.
c. If no screws or plates are missing, check the torque condition of the VICS plate retaining screws. To check for looseness of the VICS plates to
the shaft, pinch the valve with your fingers then push and pull in an up and down and then a back and forth motion to see if there is any looseness
between valve and the shaft.
