2002 2 5 nissan altima start up rough idle


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2002 Nissan Altima Engine – Dies at Idle/Stumbles/MIL ON/DTC P0340

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Filed Under (Nissan) by admin on 28-09-2010

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2002 Altima (L31) with 2.5 Liter Engine (QR25DE) Only 2002 Sentra (B15) with 2.5 Liter Engine (QR25DE) OnlyIf an applied vehicle exhibits one or more of the following symptoms; ^ MIL “ON” with DTC P0340 (Camshaft Position Sensor) stored in Self Diagnosis results, ^ Engine stumbles momentarily during cruise condition, ^ Engine stops running at idle, The cause of this incident may be the ignition coils. A new resistor assembly (located inside the ignition coil tube) is available to repair the described symptoms, if they should occur. SERVICE PROCEDURE 1. Verify that the vehicle has one or more of the symptoms listed above in the Service Information. 2. Remove all four ignition coils. Refer to the appropriate 2002 Service Manual for removal procedure of the ignition coils (page EM-26 for Altima, page EM-106 for Sentra). 3. Install the new resistor assembly in all four ignition coil tubes as follows;

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2003 – 2005 Nissan Altima 2004 Nissan Maxima ENGINE IS HARD TO START WHEN WARM

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Filed Under (Nissan) by admin on 04-06-2010

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The engine is hard to start when warm, but starts OK when the engine is cold. NOTE: “Hard start” is engine crank time that is longer then 3 seconds. • If you only have DTC P0340, replace only Bank 1 CMP (Camshaft Position) Sensor. • If you only have DTC P0345, replace only Bank 2 CMP (Camshaft Position) Sensor. • If you have both codes, replace both sensors. • For a “hard to start warm” incident, replace both sensors, even if you have no codes. Refer to sections EC and EM in the correct Service Manual for sensor replacement information. If replacement of the sensors does not solve your incident, go back to ASIST for further diagnostic and repair information.

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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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2002-2003 Nissan Altima QR25DE ENGINE EXHAUST PIPE HANGER PIN AND PRE-CATALYST

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Filed Under (Nissan) by admin on 27-11-2010

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For 2003 and 2004 Applied Vehicles: When you perform Procedure C (ECM Reprogramming), go to NTB06-051a for reprogramming information. You will still need to perform all other parts of this bulletin on 2003 and 2004 Applied Vehicles. INTRODUCTION Nissan has determined that some 2002-2003 model year Altima and 2002-2004 model year Sentra vehicles equipped with the 2.5 liter engine have defects that relate to motor vehicle safety. For 2002-2003 model year Altimas, there is a possibility that the exhaust pipe hanger pin may catch debris from the road that could be ignited by contact with the catalytic converter and cause a fire. In addition, for 2002-2003 model year Altimas and 2002-2004 model year Sentras, there is a possibility that certain engine operating conditions may cause damage to the pre-catalyst. Material from inside a damaged pre-catalyst could enter the engine and result in increased oil consumption. If the engine oil level is not checked on a periodic basis and drops below the low level, and the driver continues to operate the vehicle ignoring noticeable engine noise, engine damage may occur which could result in a fire.

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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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