System Check (2.5L)
WARNING: This page is about a different car, the 1994 Mazda MX-6 and 1994 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Connect tachometer to IG terminal of diagnostic connector. See Fig 1 . Start engine, and operate at idle. Manually open throttle valve. Ensure shutter valve actuator rods No. 1 and 2 retract at specified RPM. See VRIS RPM SPECIFICATIONS table. See Fig 2 . If necessary, check Variable Resonance Induction System (VRIS) components.
VRIS RPM SPECIFICATIONS
| RPM | Position | ||
|---|---|---|---|
| 2.5L | |||
| Shutter Valve Actuator Rod No. 1 | |||
| Less Than 3250 | Closed | ||
| 3250-4250 | Open | ||
| 4250-6250 | Open | ||
| Greater Than 6250 | Closed | ||
| Shutter Valve Actuator Rod No. 2 | |||
| Less Than 3250 | Closed | ||
| 3250-4250 | Closed | ||
| 4250-6250 | Open | ||
| Greater Than 6250 | Closed | ||