1994 MIATA Additional Line Pressure Test
This additional line pressure test should only be performed on 1994 Miata. Connect gauge to right side inspection hole. Connect a vacuum pump to vacuum modulator and place in vehicle. Shift to "R" with engine at idle, note pressure at specified vacuum. Compare with the ADDITIONAL LINE PRESSURE TABLE - 1994 MIATA.
ADDITIONAL LINE PRESSURE
| Vacuum | psi (kg/cm2 ) |
|---|---|
| 0 in. Hg (Atmospheric Pressure) | 128-156 (9-11) |
| 8 in. Hg | 100-114 (7-8) |
| 16 in. Hg | 57-71 (4-5) |