Brad's Car Manuals: A 3rd party mirror of CHARM + LEMON car manuals
Home >> Honda >> 1984 >> Civic DX, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Throttle Control System >> System Testing >> Dashpot System Check

Dashpot System Check

Download the full database via torrent (~1.1 TB)  |  Download Brad's custom LEMON patches
  1. Connect tachometer to engine. Warm engine to normal operating temperature (cooling fan on). Disconnect vacuum hose from throttle control valve.
  2. Connect hand vacuum pump (except Civic models) to throttle control valve and apply 8 in. Hg vacuum. Check that engine speed rises (within 1 minute) to 1400-2000 RPM on Civic models.
    Fig 1: Dashpot System
    G43025
  3. If speed was too low, or if speed was too high, loosen lock nut and turn adjusting nut.
  4. If speed cannot be adjusted, or diaphragm will not hold vacuum, replace the throttle control valve and retest.
scientia non olet · About Brad's Car Manuals