3.2 liter yamaha engine manual IAC valve How do I replace the IAC valve on this engine? Steps? I just bought a new one and I need to get it replaced. FORD 1994 Taurus SHO 3.2 liter engine YAMAHA

The 2004 Suzuki Verona 2.5L does not utilize an idle air control (IAC) valve. Instead, an electronic throttle control (ETC) system is used which Suzuki calls the "main throttle idle actuator" (MTIA). This component is the throttle body assembly but with an internal motor that adjusts the throttle plate open or closed based on accelerator pedal position inputs to the engine control module (ECM). Similarly, the ECM adjusts the throttle plate angle at idle to control idle speed. If the idle speed is not correct, the throttle body may need to be cleaned, calibrated or replaced. You can read more here: https://www.yourmechanic.com/article/how-to-replace-a-throttle-controller-by-mia-bevacqua

Sounds like a possible idle air control problem (IAC) The smoke probably has nothing to do with the idle problem. Possible valve cover leak??

pls check your system by using a car scanner........ then monitor your IAC valve duty ratio up when shift to D position after it's OK clean throttle body and IAC valve.good luck

For rough idle issues and problem troubleshooting,go through the help links provided below :-----van idles rough?

http://howtobyme.blogspot.in/2012/01/2004-ford-freestar-van-idles-rough.html

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will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

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runs lean and idles rough?

http://technoanswers.blogspot.in/2012/02/ford-runs-lean-and-idles-rough.html

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Engine stumbles coming off idle when warm?

http://repairhelpcenter.blogspot.com/2012/01/engine-stumbles-coming-off-idle-when.html

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Erratic idle on car?

http://schematicsdiagram.blogspot.com/2011/12/erratic-idle-on-car.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Idle Air Control (IAC) Valve Replacing?

http://schematicsdiagram.blogspot.com/2011/12/gmc-idle-air-control-iac-valve.html

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Replace Idle air control valve?

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Test Idle Air Control (IAC) Valve?

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Idle Air Control (IAC) Valve operation?

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Engine quits at idle?

http://repairhelpcenter.blogspot.com/2011/10/engine-quits-at-idle.html

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Car overheats and Air blows hot at idle?

http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html

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While stop engine idles like cylinder missing?

http://schematicsdiagram.blogspot.com/2012/01/while-stop-engine-idles-like-cylinder.html

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This will help.

Thanks.

Disconnect the negative cable from the battery terminal...Locate the IAC valve on the side of the engine, near the intake...Remove the electric cable on the back of the IAC valve. Remove the screws that attach to the IAC valve and set them aside...
Pull the IAC out of the Cadillac DeVille and replace with new valve...Connect the IAC valve to the wire and reconnect the screws. Turn the screws so that they are completely tightened...Reconnect the negative cable to the battery and start engine to test valve.

Good luck, i hope this helps.

Operation

The Idle Air Control (IAC) valve controls the amount of air that bypasses the throttle valve, which controls the engine idle speed. The IAC valve consists of windings, an armature, a return spring, and a rotary slide. The engine control module (ECM) pulses the voltage to the winding, the opposing forces on the armature by the return spring cause it to maintain a fixed position, adjusting the amount of bypass air to maintain the correct idle speed.

Removal & Installation

1. Turn the ignition switch to the OFF position.
2. Disconnect the idle air control valve harness electrical connector.
3. Using a suitable tool, remove idle air control valve.
4. Installation is in reverse order of removal.

Testing

Checking Idle Air Control Valve (IAC) Triggering

1. Check IAC valve is electrically OK.
2. Slide up boot on the IAC valve connector.

Fig. IAC Connector

1. Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger the IAC valve - N71.
2. Connect VAG 1527B voltage tester, or equivalent, between terminal 1 and engine ground (GND). Voltage tester must flash.
3. Connect VAG 1527B voltage tester, or equivalent, between terminal 2 and battery positive voltage (B+). Voltage tester must light up.
4. If specified results are not obtained:
   1. Connect VAG 1598/19 test box, or equivalent, to ECM harness connector.
   2. Check the wiring between harness and connector terminal 1 (in engine compartment) to test box socket D11 . Then check the wiring between harness connector terminal 2 and test box socket D9 using wiring diagram. Repair as necessary.
   3. If the wiring is okay, but triggering still does not occur, replace the ECM.
   4. If the triggering signal and the wiring are okay and the valve does not react, replace the IAC valve.
   
   

Checking Mechanical Function

1. Remove the idle air control (IAC) valve.
2. Visually check the surface of the rotary slide (arrow) for signs of wear.

Fig. Showing the IAC Valve

WARNING Do NOT check for ease of movement by prying on the rotary slide with a screwdriver or other tools that could cause scratching or other damage.

1. Reconnect the IAC valve, while still removed, to the harness connector.
2. Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger IAC valve - N71.
3. Check whether rotary slide moves freely from stop to stop.
4. If there are signs of scoring, or if the rotary slide does not move freely in both directions, replace the IAC valve.
5. If the IAC valve does not respond (not triggered) during the Output Diagnostic Test Mode, check triggering.

Resistance Test

1. Remove the idle air control valve harness connector.
2. Use a suitable Digital Multimeter (DMM) to measure the resistance between the 2 terminals of the idle air control valve.
3. The correct measurement should be 7-11 ohms. If not, replace the idle air control valve.

NOTE At room temperature, the resistance value will be lower. The resistance value will be higher if the Idle Air Control (IAC) valve is measured at under-hood operating temperatures.

1. Reconnect the idle air control valve harness connector.
2. The idle air control valve should hum and vibrate slightly when the ignition is turned 'ON'. If not, the ECM or harness may be defective.

Testing with VAG1551:

1. Remove the idle air control valve harness connector.
2. Connect the VAG 15278 LED tester to terminals 1 and 2 of the harness connector using the jumpers from VW 1594 adaptor kit.
3. Turn ignition ON, perform steps from output DTM (Diagnostic Test Mode) to activate the IAC valve (N71) LED tester must blink.
4. If tester does not blink, check wiring using VAG 1598 pin out box, electrical checks, step 26. Repair as necessary.
5. If wiring is okay, replace the ECM.
6. If LED tester blinks but the IAC valve does not operate, replace the IAC valve.

Start with the simple and replace the fuel filter and clean your throttle body with throttle body cleaner. Make sure you clean the passage ways to your Idle Air Control (IAC) valve in the throttler body opening to try to clean your IAC also.
Thank you for using fixya and good luck.

hmm

try turning the ignition on,, let it sit for 30 seconds ,, switch it off and then start ,,,

if it works then your fuel pump is sending too low pressure,, change the pump...

if not then change the IAC valve and the oxygen sensor and the engine coolant temperature sensor..

Your Idle Air Control (IAC) valve may be dirty with carbon, simple fix with throttle body cleaner through the IAC passageway through the throttle body. Make sure it's throttle body cleaner and not carburetor cleaner, the carb cleaner is to corrosive to the gaskets used on the throttle body.
If cleaning the IAC does not help, then it's a good chance that the IAC is to far gone and will need to be replaced.
Good luck and thank you for using fixya

its located on the throttle body connected to your air intake manifold where your throttle cable connects on the throttle body there is a adjustment screw connected there