LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 1990 >> LS 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Throttle Controls (LS400) >> Dashpot
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Throttle Controls (LS400): Dashpot

  1. Start and warm engine to operating temperature. Remove cap, filter and separator from dashpot. Raise and hold engine speed to 2500 RPM.
  2. Plug small hole in back of dashpot with finger. Release throttle. When throttle is released, engine speed should be 2000 RPM. After a few seconds, engine should return to idle.
  3. If dashpot does not function properly, try adjusting using a wrench. If dashpot still will not function properly, replace dashpot.
scientia non olet · About LEMON Manuals