idle air control valve 2001 chevy venture


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2000 Oldsmobile Intrigue DTC P0410 Secondary Air Injection (AIR) System

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Filed Under (Oldsmobile) by admin on 10-04-2011

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Refer to Engine Controls Schematics MAF, Secondary Air Injection Pump Bypass Solenoid, IAC and Secondary AIR Pump . Circuit Description The AIR pump is used on this vehicle to lower tail pipe emissions on start-up. The powertrain control module (PCM) grounds the AIR pump relay control circuit, which energizes the AIR pump. The PCM also grounds the AIR solenoid valve control circuit, which energizes the AIR solenoid valve. The AIR solenoid valve opens allowing manifold vacuum to open the AIR control valves. The PCM enables both control circuits when AIR system operation is desired. When the AIR system is active, the AIR pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR control valves replace the conventional check valves. When the AIR system is inactive, the AIR control valves prevent air flow in either direction. DTC P0412 applies to the AIR solenoid control circuit. DTC P0418 applies to the AIR pump relay control circuit. DTC P0410 sets if an air flow problem is detected. The PCM will run two tests using the heated oxygen sensor (HO2S) voltage to diagnose the AIR system. Both tests have two parts. The passive test is performed during regular AIR pump operation. The passive test consists of the following: Passive Test Part 1 When the AIR system is enabled, the PCM monitors the HO2S voltage. If the HO2S voltage goes below a threshold, the PCM interprets this as an indication that the AIR system is operational. Passive Test Part 2 When the AIR system is disabled, the PCM monitors the HO2S voltage. The HO2S voltage should increase above a threshold and switch normally. If both of these tests indicate a pass, no further action is taken. If one of the above tests failed or is inconclusive, the diagnostic will proceed to test two. The active test is performed specifically for diagnostic purposes. Test two consists of the following: Active Test Part 1 During this test the PCM turns the AIR system on during closed loop operation. When the AIR system is activated, the PCM monitors the HO2S voltage. If the AIR system is operating properly, the HO2S voltage should go below a predetermined threshold. Active Test Part 2 The PCM turns the AIR system off. The HO2S voltage should return to above a rich threshold.

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2001-2005 Ford Escape UNSTABLE IDLE

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Filed Under (Ford) by admin on 27-01-2011

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ISSUE Some 2001-2005 Escape vehicles equipped with a 3.0L engine may exhibit idle speeds outside the specified range. Some 2001-2003 Escape vehicles equipped with a 3.0L engine and CD4E automatic transaxle may exhibit a transmission shudder. ACTION Follow the Service Procedure steps to correct the condition. SERVICE PROCEDURE 1. If the concern is a 2001-2005 Escape with idle speeds outside the specified range: a. Install a new idle air control (IAC) valve with jumper harness included in the kit. The new Denso brand IAC will be installed with the electrical connector facing the opposite direction of the original (Hitachi) valve which is why the jumper harness is required. The original (Hitachi) IAC connector faces the front of the vehicle while the new Denso IAC connector faces toward the rear of the vehicle. b. Referring to the calibration charts (Figures 1 and 2), select the applicable file and reprogram the powertrain control module (PCM) using the TSB Service Procedure and WDS/IDS release B40.5 and higher. Calibration files may also be obtained at www.motorcraft.com. 2. If the concern is a 2001 – 2003 Escape with transaxle shudder, drain, flush and refill the transmission fluid with MERCON® Multi-Purpose Automatic Transmission Fluid. Then, referring to the calibration charts (Figures 1 and 2), select the applicable file and reprogram the PCM using the TSB Service Procedure and WDS/IDS release B40.5 and higher. Calibration files may also be obtained at www.motorcraft.com. 3. When reprogramming the PCM use blank path programming. Select the proper file from the chart and manually enter the PCM part number or tear tag number to obtain the updated calibration file. If the concern is a 2001-2005 Escape with idle speeds outside the specified range: a. Install a new idle air control (IAC) valve with

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2003 Honda PILOT Idle Control System Malfunction

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

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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.?

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2002-2005 Subaru Impreza WRX/STI Cold Air Intake Installation Guide

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Filed Under (Subaru) by admin on 02-01-2011

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Removal of Factory Intake 1. 2. Turn the ignition OFF and disconnect the vehicle’s negative battery cable. Loosen and remove the two bolts that secure the air inlet duct to the radiator core support, then remove the air inlet duct. Loosen the clamps at the air cleaner assembly and turbo inlet tube, then remove the stock intake tube. Loosen and remove the two bolts that secure the air cleaner assembly. Pull upwards to remove the air cleaner assembly. Using the bolt removed to secure the ABS control bracket. Loosen and remove the two screws that secure the mass air sensor to the air cleaner assembly, then remove the mass air sensor. Raise the vehicle and support with the jack stands, then remove the front passenger side tire. Remove the five plastic push/screw clips that secure the inner wheel house valance. Remove the 6 screw in push clips that secure the air duct to the lower valance, then remove the air duct. Remove the two remaining push clips that secure the lower valance, then pull the valance down. From inside the apron, remove the push clip that secures the apron to the upper fender. Remove the hex nut that secures the air intake resonator to the inner fender. Loosen and remove the second hex nut that secures the air intake resonator from underneath the vehicle. Remove the air intake resonator. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. Install of Intake 16. Install the reducer and clamps onto the turbo and secure. 17. Loosen and remove the hex bolt on the cam cover. 18. Using the provided allen bolts, secure the mass air sensor into the adapter on the intake tube. 19. Using the allen bolts, secure the mass air sensor into the adapter on the intake tube. 20. Slide the intake tube into the reducer and secure the mass air sensor into the adapter on the intake tube. 21. Tighten the clamp on the intake tube. 22. Install the reducer and clamps onto the intake tube. 23. From underneath the vehicle loosen and remove the hex nut that secures the ABS pump to the inner fender. 24. Slide the cold air tube intake tube from underneath the vehicle into the hole in the inner fender, then line up the bracket with the ABS bolts, and tighten with the nut remove. 25. Slide the reducer onto the cold air intake tube. 26. Install the Bomz Filtercharger onto the cold air intake tube and secure with clamp. 27. Reverse the removal process for the plastic wheelhouse valance and air duct with the stock push clips. 28. Reconnect the mass air sensor electrical connection. 29. Reconnect the negative battery cable and double check to make sure everything is tight before starting the vehicle. Resetting the ECU This is to be completed at your own risk. This procedure will reset the computer so that it may “learn” of your new intake. We are not to be held liable for any mishaps that you may occur while completing this process. • • Disconnect the Negative battery cable for 5 minutes. Reconnect the battery cable and false panel cover.

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1996 Volkswagen Golf ADJUSTMENTS AIR BAG SPIRAL SPRING REMOVAL & INSTALLATION

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Filed Under (volkswagen) by admin on 30-06-2011

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SYSTEM OPERATION CHECK An air bag light is located on left side of instrument cluster. Air bag light is used to indicate readiness of system. Light glows when ignition switch is on or engine is started. Light should stay on about 3 seconds while air bag control unit performs an electronic test of system. If air bag light does not glow when ignition is on or does not go out after 3 seconds, a fault probably exists in system. If a fault occurs while ignition is on, it is stored in fault memory. Warning light will then glow and air bag system will be switched off. If warning light glows or flickers while driving, air bag system should be tested. See DIAGNOSIS & TESTING in appropriate AIR BAG RESTRAINT SYSTEM article in ACCESSORIES/SAFETY EQUIPMENT section. * * ADJUSTMENTS AIR BAG SPIRAL SPRING To center spiral spring assembly, turn spring assembly 3 turns from stop in either direction. REMOVAL & INSTALLATION WARNING: Failure to follow air bag service precautions may result in air bag deployment and personal injury. See SERVICE PRECAUTIONS. After component replacement, perform a system operational check to ensure proper system operation. See SYSTEM OPERATION CHECK. AIR BAG MODULE Removal 1) Before proceeding, follow air bag service precautions. See SERVICE PRECAUTIONS. Disable air bag system. See DISABLING & ACTIVATING AIR BAG SYSTEM. 2) Air bag module is located in steering wheel. See Fig. 1. Remove air bag module Torx head screws from rear of steering wheel. Lift off air bag module from steering wheel, and tilt air bag module downward. Disconnect air bag module connector. AIR BAG RESTRAINT SYSTEM – 1995 AIR BAG RESTRAINT SYSTEM – 1996

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