Idle Mixture Inspection
WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
- Perform ENGINE TUNE-UP PREPARATION .
- Verify that the idle speed and ignition timing are within the specification.
- Insert an exhaust gas analyzer to the tailpipe.
- Verify that the CO and HC concentrations are within the regulation.
- If not, inspect the following.
- OBD system
- HO2S
- Intake manifold vacuum
- Fuel line pressure
- Ignition timing control
- If the systems are normal, replace the TWC.
- If not, inspect the following.