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Test No. 2

  1. Locate ignition timing adjustment connector. See IGNITION TIMING ADJUSTMENT CONNECTOR LOCATION  under IGNITION TIMING in this article. Connect jumper wire between ignition timing adjustment connector and ground.
  2. Locate diagnostic connector under instrument panel. Connect jumper wire between diagnostic connector terminal No. 10 (White wire) and ground. See Fig 5 . Start engine. Check basic idle speed. If basic idle speed is within specification, go to step 9). If basic idle speed is not within specification, go to step 3).
    CAUTION: When cleaning throttle body, plug air by-pass hole in throttle body to prevent solvent from entering passage.
  3. Remove air intake hose. Check throttle body for deposits. If throttle body is clean, disconnect jumper wires connected in steps 1) and 2), and go to step 6). If throttle body contains deposits, clean throttle body with solvent. Replace air intake hose.
  4. Check basic idle speed. If basic idle speed is within specification after cleaning throttle body, go to step 9). If basic idle speed is not within specification after cleaning throttle body, disconnect jumper wires connected in steps 1 and 2, and go to step 6).
  5. On all models except Ram-50 3.0L, adjust idle position switch. See IDLE POSITION SWITCH  under THROTTLE POSITION SENSOR (TPS) in this article.
  6. On Ram-50 3.0L, adjust fixed Speed Adjusting Screw (SAS). See FIXED SPEED ADJUSTING SCREW (FUEL INJECTED ENGINES)  under IDLE SPEED & MIXTURE in this article.
  7. After adjusting idle position switch (all models except Ram-50 3.0L) or fixed SAS (Ram-50 3.0L), reconnect jumper wires as in steps 1) and 2). Check basic idle speed. If basic idle speed is within specification, go to step 10).
  8. If basic idle speed is not within specification, turn idle speed adjusting screw on throttle body until within specification. See Fig 1 -Fig 4 .
  9. If basic idle speed is within specification after turning idle speed adjusting screw, go to step 10). If basic idle speed is not within specification after turning idle speed adjusting screw, check for leaking fast idle air valve. Replace throttle body if fast idle air valve leaks.
  10. Turn ignition off. Disconnect jumper wires from ignition timing adjustment connector and diagnostic connector. Operate engine at idle for approximately 5 minutes. Ensure engine idles smoothly and within curb idle specification. See IDLE SPEED SPECIFICATIONS table.
IDLE SPEED SPECIFICATIONS

Application Curb Idle Basic Idle
1.5L
Colt & Colt 200, Summit 650-850 700-800
Colt Wagon 600-800 650-750
1.6L Colt & Colt 200, Summit 650-850 700-800
1.8L Colt Wagon 600-800 650-750
2.0L (VIN V) Colt Vista 600-800 650-750
2.4L Ram-50 650-850 700-800
3.0L Ram-50 600-800 650-750
Fig 1: Locating Idle Speed & Fixed Speed Adjusting Screws (1 of 4)
G90C17352Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 2: Locating Idle Speed & Fixed Speed Adjusting Screws (2 of 4)
G90D17353Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 3: Locating Idle Speed & Fixed Speed Adjusting Screws (3 of 4)
G90E17354Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 4: Locating Idle Speed & Fixed Speed Adjusting Screws (4 of 4)
G90E17354Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Fig 5: Identifying Diagnostic Connector Terminal
G90F17355Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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