Idle Speed & Ignition Timing
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1990 Mitsubishi Van, 1990 Mitsubishi Sigma, 1990 Mitsubishi Precis, 1990 Mitsubishi Pickup, and 1990 Mitsubishi Montero. However, it is still accessible from the selected car via links, so may be relevant.
- Ensure vehicle is at operating temperature, all accessories are off and transmission is in Park or Neutral. Vehicle front wheels must be in straight-ahead position and curb idle speed set to specification. If vehicle is equipped with a dual diaphragm distributor, go to next step. If vehicle is equipped with an ignition timing adjustment connector, go to step 3).
- Disconnect vacuum hose farthest from distributor. Plug vacuum hose. Check ignition basic timing. Connect vacuum hose to distributor. Check ignition actual timing. Refer to IGNITION TIMING table in this article.
- Ground ignition timing adjustment connector. Timing adjustment connector is a Yellow/Red wire at left of center, on firewall. Check ignition basic timing.
- Disconnect ground wire on ignition timing adjustment connector. Check ignition actual timing. Refer to IGNITION TIMING
table.IDLE SPEED & CO LEVEL SPECIFICATIONS (1)
Application Idle RPM CO % Montero (2.6L) 700-900 .1-.3 (1) Idle speed and mixture are computer controlled on fuel injected models. IGNITION TIMING (Degrees BTDC @ RPM)Application (1) Basic (2)(3) Actual 1.5L Mirage 5 @ 600-800 10 @ 600-800 Precis 5 @ 600-800 10 @ 600-800 1.6L Mirage 5 @ 650-850 8 @ 650-850 1.8L Eclipse 5 @ 600-800 10 @ 600-800 2.0L Eclipse & Galant (VIN R) 5 @ 650-850 8 @ 650-850 Galant (VIN V) 5 @ 650-850 10 @ 650-850 2.4L Pickup & Van/Wagon 5 @ 650-850 8 @ 650-850 2.6L Montero 7 @ 750-950 12 @ 750-950 3.0L Montero & Sigma 5 @ 600-800 15 @ 600-800 Pickup 8 @ 600-800 15 @ 600-800 (1) With ignition timing adjustment connector grounded or vacuum hose (farthest from distributor) disconnected. (2) With ignition timing adjustment connector ungrounded or vacuum hose (farthest from distributor) connected. Ignition timing may fluctuate. (3) If vehicle altitude is more than 2300 ft. above sea level, actual timing may be advanced.