2002 eclipse stalls rough idle


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2002 Mitsubishi Eclipse GT Unstable Idle (Rough Idle, Hunting)

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Filed Under (Mitsubishi) by admin on 26-10-2010

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In cases such as the above, the cause is probably the air/fuel mixture or idle air control motor. Other systems affecting idle quality include the ignition system and compression. TROUBLESHOOTING HINTS (The most likely causes for this case:) Malfunction of the ignition system. Malfunction of air/fuel ratio control system. Malfunction of the IAC system. Malfunction of the evaporative emission purge solenoid system. Poor compression pressure. Vacuum leak. Malfunction of the EGR solenoid system. STEP 1. Check if the battery terminal is disconnected. Q: Has the battery terminal been disconnected lately? YES: Start the engine and let it run at idle for approximate 10 minutes after engine warm up. Then, if a malfunction occurs, go to Step 2. NO: Go to Step 2. STEP 2. Using scan tool MB991502, read the diagnostic trouble code (DTC). CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch is to the “LOCK” (OFF) position before connecting or disconnecting scan tool MB991502. 1. 2. 3. 4. Connect scan tool MB991502 to the data link connector. Turn the ignition switch to the “ON” position. Read the DTC. Turn the ignition switch to the “LOCK” (OFF) position. Q: Is the DTC is output? YES: Refer to Diagnostic Trouble Code Chart. NO: Go to Step 3. STEP 3. Check the engine idling state. Q: Is it hunting remarkably? YES: Go to Step 4. NO: Go to Step 5. STEP 4. Check the following items. 1. Carry out the following cleaning. a. Clean the throttle valve area. 2. After cleaning, confirm that the malfunction symptom is eliminated. Q: Is the malfunction symptom resolved?

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1997 Ford Escort LX ROUGH IDLE, LOW POWER AND/OR STALL AT IDLE WITH DTCS P0300-P0304

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Filed Under (Ford) by admin on 29-05-2010

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Some vehicles equipped with the 2.0L SPI engine may exhibit a malfunction indicator lamp (MIL) illuminated and diagnostic trouble codes
(DTCs) P0300 through P0304 stored in memory. The vehicle may also have a rough idle or reduced power condition, and/or may stall at an idle. This may be caused by sticking exhaust valves due to excessive carbon build-up. ACTION Check for faulty fuel injectors and ignition wires. One or more exhaust valves may be temporarily sticking due to carbon build-up between the valve stem and guide. If the diagnostic checks point to a sticking exhaust valve, the cylinder head assembly may need to be replaced with a new level cylinder head assembly with revised valve guides, revised exhaust valves will also need to be installed to help prevent carbon build-up. Refer to the following Service Procedure for details.

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1997-2002 Ford ESCORT DRIVEABILITY – ROUGH IDLE, LOW POWER AND/OR STALL AT IDLE

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Filed Under (Ford) by admin on 14-12-2010

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vehicles equipped with the 2.0L SPI engine may exhibit a malfunction indicator lamp (MIL) illuminated and diagnostic trouble codes (DTCs) P0300 through P0304 stored in memory. The vehicle may also have a rough idle or reduced power condition, and/or may stall at an idle. This may be caused by sticking exhaust valves due to excessive carbon build-up. ACTION Check for faulty fuel injectors and ignition wires. One or more exhaust valves may be temporarily sticking due to carbon build-up between the valve stem and guide. If the diagnostic checks point to a sticking exhaust valve, the cylinder head assembly may need to be replaced with a new level cylinder head assembly with revised valve guides, revised exhaust valves will also need to be installed to help prevent carbon build-up. Refer to the following Service Procedure for details. SERVICE PROCEDURE

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DRIVEABILITY—IDLE AIR CONTROL (IAC) VALVE DIAGNOSTIC SERVICE TIPS

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Filed Under (Ford) by admin on 27-04-2010

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FORD: 2000-2003 TAURUS 2002 THUNDERBIRD 2000-2003 EXPLORER, RANGER 2001-2003 EXPLORER SPORT TRAC, EXPLORER SPORT
LINCOLN: 2000-2002 LS MERCURY: 2000-2003 SABLE, MOUNTAINEER ISSUE
Some vehicles, may exhibit drivability conditions.
These may include: • No start • Difficult to start • Stall • Low idle • Rough • High idle • Hesitation/surge while accelerating or at steady speed These conditions may be intermittent with no Diagnostic Trouble Codes (DTC) and no Malfunction Indicator Lamp (MIL). In some cases DTC and MIL may be evident. ACTION Trouble cannot be identified with 95% of returned Idle Air Control (IAC) valves. The following procedure is supplemental information to normal diagnostics to facilitate accurate identification of malfunctioning valves. These symptoms would include engine stall, hard start, crank/no start, idling problems, and Idle Speed Control System related DTC’s. If the service writer uses the attached worksheet (Figure 2) for all drivability concerns including stalls it will assist the technician making a correct repair the first time.

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1991 Mitsubishi Eclipse GSX 2.0L Motor starts and stalls, MPI relay clicks off and the fuel pump stops running

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Filed Under (Mitsubishi) by admin on 13-06-2010

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Tests/Procedures: 1. Check the Electronic Control Unit (ECU) powers and grounds. Powers are at pins #102, 103, 107 and 110. Grounds are pins 101 and 106. 2. Check the ECU control of the Multi-port Injection (MPI) relay. At start-up, the ECU grounds pins 56 and 63 3. If good, replace the Powertrain Control Module (PCM). Potential Causes: Engine Control Unit (ECU) MPI Relay Wiring Harness Diagnostic Codes: None 1991 Mitsubishi Eclipse, GSX 2.0L * Replaced Engine Control Unit (ECU)

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