Modulating Pressure
NOTE:
Modulating pressure port is next to vacuum control unit at 4 o'clock position. Disconnect vacuum line and measure while driving at about 30 MPH.
- Disconnect vacuum hose and remove rubber cap from vacuum control unit. Pull locking plate out of locking slots to permit rotation. See Fig 1 . Turning adjustment screw in vacuum control results in pressure change of about 6 psi (.414 Bar). Adjust to correct value. See MODULATING PRESSURE SPECIFICATIONS table.
- After turning adjusting screw, push locking plate back into locking slots. Put rubber cap back on vacuum control unit. Connect vacuum hose and check modulating pressure again. Install screw on vacuum line holder (if equipped).
NOTE:
Modulating pressure port is next to vacuum control unit at 4 o-clock position. Disconnect vacuum line and measure while driving at about 30 MPH.
MODULATING PRESSURE SPECIFICATIONS
| Model | Psi (Bar) |
|---|---|
| 190D | 41 (2.8) |
| 190E (2.3) | 56 (3.9) |
| 190E (2.6) | 48 (3.3) |
| 260E | 48 (3.3) |
| 300SDL | 51 (3.5) |
| 420SEL | 52 (3.6) |
| 560SL, 560SEC, 560SEL | 58 (4.0) |