nissan tiida hunting at idle

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


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

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?

2002 Nissan Altima tune up and cleaned the throttle body


Filed Under (Nissan) by admin on 21-12-2010

Customer Concern: Tests/Procedures: Potential Causes: Tech Tips: Just did a tune up and cleaned the throttle body and now the idle is hunting up and down. 1. Perform the Accelerator Pedal Released Position Learning procedure. 2. Perform the Throttle Valve Closed Position Learning procedure. 3. Perform the Idle Air Volume Learning procedure described in the Identifix article listed for this vehicle. It may be necessary to follow TSB# NTB05-067 and disconnect one or more fuel injectors as necessary to bring the RPM down and then perform the Idle Air Volume Learning procedure. 4. If the idle will not relearn, it may be necessary to bring the vehicle to the dealer to have the factory scan tool, try going through the relearn procedures. 5. If the problem still occurs, the vehicle may require throttle body replacement. Idle Relearn Procedure Engine speed at 200 RPM or more over the target idle speed will set this code. There is a TSB (TSB# NTB05-067) concerning this code that refers to disconnecting one or more fuel injectors to bring the RPM down and perform the Idle Air Volume Learning procedure. It often takes disconnecting two injectors to bring the engine RPM low enough for the idle relearn to work. The idle will not relearn if the engine speed is too high. During the relearn procedure, idle relearning actually begins when the engine is started. The TSB refers to using the factory Consult scan tool, but the manual procedure does work if the procedure is followed EXACTLY. The engine and automatic transmission (if equipped) needs to be warmed up too – follow the preparation instructions.



Filed Under (Nissan) by admin on 04-01-2011

SERVICE PROCEDURE 1. Set the parking brake. 2. Connect C-III to the vehicle. 3. Use C-III to check for Air Bag DTCs. a. Navigate C-III to Air Bag Direct Diagnostic Mode. b. Make sure to check both SELF DIAG RESULTS and SELF-DIAG [PAST]. • SELF-DIAG [PAST] is under Special function. • If there are any DTCs stored for AIR BAG other than B1033, B1034 and/or B1035, perform repairs as needed, and then erase DTC before continuing with this procedure. • Diagnosis and repair for DTCs other than B1033, B1034, and/or B1035 is not covered by this bulletin. NOTE: All DTCs (except B1033, B1034, and B1035) must be repaired and erased before continuing with this procedure. 4. Disconnect C-III from the vehicle. 5. Start the engine and let it idle for about 5 seconds. 6. Turn the ignition OFF. 7. WARNING: Prep the vehicle for Crash Zone Sensor replacement as follows: The following are VERY IMPORTANT to prevent unexpected air bag deployment. • Remove the ignition key / Intelligent Key from the cabin of the vehicle and set aside, away from the vehicle (this will prevent accidentally turning the ignition ON). • Make sure the ignition remains OFF until after the new sensor is completely installed. • Make sure no one is in the vehicle cabin and no one enters the vehicle cabin until after the sensor is completely installed. • Wait for all control units to “power down” (at least 1 minute) before continuing. 8. Locate the Crash Zone Sensor (see Figure 2). Crash Zone Sensor Cover 9. Remove the 2 Crash Zone Sensor nuts shown in Figure 3. • Discard these nuts. They will not be reused. 10. Remove the Crash Zone Sensor Cover. 11. Disconnect the electrical connector shown in Figure 4.

2003 Honda PILOT Idle Control System Malfunction


Filed Under (Honda) by admin on 21-12-2010

NOTE: If DTC P1519 is stored at same time as DTC P0505, troubleshoot DTC P1519 first, then recheck for DTC P0505. 1. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on. 2. Check the engine speed at idle with no-load conditions: headlights, blower fan, rear window defogger, radiator fan, and air conditioner off. Is the engine running at 730+/-50 rpm? YES – Intermittent failure, system is OK at this time.? NO – If the idle speed is less than 680 rpm, go to step 3; if it’s 780 rpm or higher, go to step 4. 3. Disconnect the idle air control (IAC) valve 3P connector. Does the engine speed increase or fluctuate? YES – Adjust the idle speed. If the idle will not adjust properly, clean the passage in the throttle body, and then adjust the idle.? NO – Replace the IAC valve.? 4. Turn the ignition switch OFF. 5. Remove the intake air duct from the throttle body. 6. Start the engine and let it idle. 7. Put your finger on the lower port (A) in the throttle body. Does the engine speed drop below 780 rpm? YES – Adjust the idle speed. If the idle will not adjust properly, replace the IAC valve, and then adjust the idle.? NO – With the throttle valve completely closed, check for vacuum leaks, and repair as necessary.?



Filed Under (Nissan) by admin on 11-04-2010

ENGINE MAINTENANCE (Petrol Engine) Replace engine oil Replace engine oil filter Inspect drive belts Inspect cooling system
Page 1© NISSAN NISSAN PERIODI CMAINTENANCE SCHEDULE NISSAN MICRA 15,000 KM Inspect brake, clutch and automatic
trans-axle fluids Inspect manual trans-axle gear oil Inspect power steering fluid and lines Inspect brake, clutch and exhaust systems
Inspect steering gear and linkage, axle and suspension parts and front driveshafts Inspect wheel alignment (if necessary rotate
tyres and balance Inspect brake pads, rotors and other brake components Inspect brake linings, drums and other brake
components Inspect foot brake, parking brake and clutch Lubricate locks, hinges & hood latch Inspect seat belts, buckles, retractors,
anchors & adjuster Clean or replace ventilation filter Replace brake fluid (Severe conditions only)