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Idle air control (iac) valve-2.0L Zetec removal

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6ya6ya
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Posted on Jan 02, 2017

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c17hydro
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SOURCE: how to remove a idle air control valve

Idle Air Control Valve The Idle Air Control (IAC) valve is located on the air intake plenum.


7515536.gif

Removal & Installation
Disconnect the battery ground cable.
Disconnect the Idle Air Control (IAC) electrical connector.
Remove the bolts and the IAC valve.
Discard the gasket.
To install:
Install a new gasket and position the IAC valve.
Torque the retaining bolts to 8 ft. lbs. (11 Nm).
Attach the electrical connector.
Reconnect the battery ground cable.

Posted on May 23, 2010

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  • 35 Answers

SOURCE: Rough Idle 2000 ford Taurus OHV

This could be a bad a/c compressor or compressor pulley bearing.Try removing the serpentine belt and turning the compressor by itself.The bearing should turn very easily,and the compressor itself should turn.If it is vety hard to turn,it is bad.

Posted on Sep 25, 2008

  • 1 Answer

SOURCE: 2001 v6 escape rough idle when cold

To update my earlier repair on the 2001 6 cyl Escape: When cold, and when the ignition was turned over but no accelerator pressure given, the rough idle finally returned the P0303 code again when the check engine light came on indicating that it wasn't caused by the plugs or the coil. FYI, I had replaced the intake manifold gaskets during the original repair and just prior to that I had replaced the fuel filter which was very dirty (I cut it open to see).

The repair manual referred to fuel injectors as a possible problem. I have run three tanks of fuel using different injector cleaning products and am very pleased with the results. Cold starts are much smoother and I am unable to coax out the P0303 code or any other code.

My opinion, change the fuel filter, use a fuel injector cleaner for a couple of tanks, change the plugs if the problem still exists. The coils were not the problem on my vehicle.

Posted on Mar 09, 2009

  • 14 Answers

SOURCE: IAC control valve. Locato\ion 2002 ford escape

If it's not idling and has problems starting, it's probably the IAC motor. It's located on the throttle body. Follow the airfilter box all the way to the engine, where the rubber flex hose attaches. The throttle body should be the first aluminum part you come to. Attached to the side you'll find small little aluminum part with a small wire harness attached. Unplug it, take the IAC motor off and clean inside with carb cleaner. This should fix the problem with the idle.

Posted on Sep 11, 2009

BCAS1298
  • 3092 Answers

SOURCE: i can't locate the IAC or idle air control valve

I.A.C sit in top on T.B.I. it's held on by two 8mm bolts, remove bolts clean surface replace gasket and reinstall sensor.

Posted on Nov 27, 2009

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My 2000 new beetle dies when I turn the a/c on


I recommend you test the idle air control valve. See procedure below. If this is not the problem, please read additional possibilities at the link below.


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


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

Testing


Checking Idle Air Control Valve (IAC) Triggering
Check IAC valve is electrically OK.
Slide up boot on the IAC valve connector.
0900c152801c00a1-nx20irngy4ugyvyt2uth3oj4-3-0.gif

Fig. IAC Connector
Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger the IAC valve - N71.Connect VAG 1527B voltage tester, or equivalent, between terminal 1 and engine ground (GND). Voltage tester must flash.Connect VAG 1527B voltage tester, or equivalent, between terminal 2 and battery positive voltage (B+). Voltage tester must light up.If specified results are not obtained:Connect VAG 1598/19 test box, or equivalent, to ECM harness connector.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 socketD9 using wiring diagram. Repair as necessary.If the wiring is okay, but triggering still does not occur, replace the ECM.If the triggering signal and the wiring are okay and the valve does not react, replace the IAC valve. Checking Mechanical Function
Remove the idle air control (IAC) valve.Visually check the surface of the rotary slide (arrow) for signs of wear.



0900c152801c00a2-nx20irngy4ugyvyt2uth3oj4-3-4.gif
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.

Reconnect the IAC valve, while still removed, to the harness connector.Use scan tool 'Output Diagnostic Test Mode' function 03 to trigger IAC valve - N71.Check whether rotary slide moves freely from stop to stop.If there are signs of scoring, or if the rotary slide does not move freely in both directions, replace the IAC valve.If the IAC valve does not respond (not triggered) during the Output Diagnostic Test Mode, check triggering. Resistance Test
Remove the idle air control valve harness connector.Use a suitable Digital Multimeter (DMM) to measure the resistance between the 2 terminals of the idle air control valve.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.

Reconnect the idle air control valve harness connector.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.

Do It Yourself Diagnosis and Repair

Aug 03, 2017 | Cars & Trucks

1 Answer

How to fix fault code P1507


Possible causes
- Faulty Idle Air Control (IAC) valve
- Idle Air Control (IAC) valve harness is open or shorted
- Idle Air Control (IAC) valve circuit poor electrical connection
What does this mean? Tech notes
The P1507 code means that the engine idle is out of factory specification. Sometimes the Idle Air Control (IAC) may have carbon built up. Disconnect the car battery, remove the valve, clean, re-install valve, and drive the vehicle for about 5 minutes with the headlights and A/C ON to get the idle relearned.
If the problem persist, the IAC valve may need to be replaced.

Read more: http://www.engine-codes.com/p1507_ford.html#ixzz3sFPyZe00

Nov 22, 2015 | 2000 Ford Ranger SuperCab

1 Answer

When i turn on the ac the idle goes low and the the car vibrates. When i turn off the ac the car stop vibrating.



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.



0900c152801c00a1.jpg enlarge_icon.gifenlarge_tooltip.gif

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.



0900c152801c00a2.jpg enlarge_icon.gifenlarge_tooltip.gif

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.

Feb 15, 2011 | 2000 Volkswagen Jetta TDI

1 Answer

Diagnostics test says idle air control underspeed error? how do i fix 1999 ford explorer


change the idle air control valve.

Idle Air Control (IAC) Valve OPERATION The Idle Air Control (IAC) valve controls the engine idle speed and dashpot functions. The valve is located on the side of the throttle body. This valve allows air, determined by the Powertrain Control Module (PCM) and controlled by a duty cycle signal, to bypass the throttle plate in order to maintain the proper idle speed. Fig. 1: Typical Idle Air Control (IAC) valve which is mounted to the throttle body - cutaway view shows air bypass direction 89684g16.gif
--- REMOVAL & INSTALLATION
  1. Disconnect the negative battery cable. To remove the IAC valve, first disconnect the negative battery cable, then the IAC wire harness plug 89684p03.jpg
    Next, remove the two IAC valve attaching bolts . . . 89684p04.jpg
    . . . and pull the valve from the intake manifold 89684p05.jpg

  2. Disengage the wiring harness connector from the IAC valve.
  3. Remove the two retaining screws, then remove the IAC valve and discard the old gasket. To install: When installing the valve, always discard the old gasket and install it using a new one 89684p06.jpg

  4. Clean the IAC valve mounting surface on the throttle body of old gasket material.
  5. Using a new gasket, position the IAC valve on the throttle body. Install and tighten the retaining screws to 71-106 inch lbs. (8-12 Nm).
  6. Attach the wiring harness connector to the IAC valve.
  7. Connect the negative battery cable.
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Oct 15, 2010 | 1999 Ford Explorer

1 Answer

After sitting, hard to start, seems not to be getting fuel. you can spray starting fluid and it starts, must run at higher than normal idle for a few minutes, then will idle normally.


OPERATION The Idle Air Control (IAC) valve controls the engine idle speed and dashpot functions. The valve is located on the throttle body on. This valve allows air to bypass the throttle plate. The amount of air is determined by the Powertrain Control Module (PCM) and controlled by a duty cycle signal. Fig. 1: Cleanable IAC valve — 5.0L engine version shown, others similar 88484g22.gif
Fig. 2: Non-cleanable IAC valve — 5.0L engine version shown, others similar 88484g23.gif
prev.gif next.gif TESTING OBD-I System
  1. Make sure the ignition key is OFF.
  2. Disconnect the air control valve.
  3. Use an ohmmeter to measure the resistance between the terminals of the valve solenoid. NOTE: Due to the diode in the solenoid, place the ohmmeter positive lead on the VPWR pin and the negative lead on the ISC pin.
  4. If the resistance is not 7–13 ohms, replace the air control valve.
---
REMOVAL & INSTALLATION Fig. 1: Idle air control valve mounting — 4.9L engine version shown, others similar 88484g10.gif
  1. Disconnect the negative battery cable.
  2. Disconnect the engine wiring to the IAC sensor.
  3. Remove the two retaining screws for the valve.
  4. Remove the IAC valve and discard of the old gasket. Fig. 2: Disengage the idle air control solenoid electrical connection 88485p12.jpg
    Fig. 3: Loosen the idle control solenoid retaining screws 88484p08.jpg
    Fig. 4: Remove the idle air control solenoid from the throttle body 88484p09.jpg
    To install:
  5. Clean the area of old gasket material.
  6. Using a new gasket, attach the IAC valve to the engine. Tighten the retaining screws to 71–102 inch lbs. (8–12 Nm).
  7. Connect the IAC valve wiring to the unit.
  8. Connect the negative battery cable.
prev.gif next.gif

Aug 01, 2010 | 1990 Ford Econoline

1 Answer

How to remove a idle air control valve is windstar 2001


Idle Air Control Valve The Idle Air Control (IAC) valve is located on the air intake plenum.


7515536.gif

Removal & Installation
Disconnect the battery ground cable.
Disconnect the Idle Air Control (IAC) electrical connector.
Remove the bolts and the IAC valve.
Discard the gasket.
To install:
Install a new gasket and position the IAC valve.
Torque the retaining bolts to 8 ft. lbs. (11 Nm).
Attach the electrical connector.
Reconnect the battery ground cable.

May 23, 2010 | 2001 Ford Windstar

1 Answer

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


may just need cleaning with carb cleaner.

here is 1996, oldest I have:

Section 03-14: Engine Controls, Electronic 1996 Taurus, Sable Workshop Manual
REMOVAL AND INSTALLATION Idle Air Control (IAC) Valve Removal
  1. Disconnect battery ground cable (14301). Refer to Section 14-01 .
  1. Disconnect the engine control sensor wiring (12A581) from the idle air control valve (IAC valve) (9F715) at the idle air control valve electrical connector.
  1. Remove the two idle air control valve retaining bolts.
  1. Remove the idle air control valve and idle air control valve gasket.
Installation
  1. NOTE: If scraping is necessary, be careful not to damage idle air control valve gasket surfaces, or drop material into intake manifold (9424) or throttle body (9E926) (depending upon application).

    Clean idle air control valve gasket mating surfaces.
  1. To install idle air control valve, reverse Removal procedure.
  1. Tighten the idle air control valve retaining bolts to 8-12 Nm (71-106 lb-in).
33b4417.gif

Jan 14, 2010 | 1994 Ford Taurus

1 Answer

How do i remove and clean the IAC


Operation

The Idle Air Control (IAC) valve adjusts the engine idle speed. The valve is located on the side of the throttle body. The valve is controlled by a duty cycle signal from the PCM and allows air to bypass the throttle plate in order to maintain the proper idle speed. Do NOT attempt to clean the IAC valve. Carburetor tune-up cleaners or any type of solvent cleaners will damage the internal components of the valve.
The Idle Air Control (IAC) valve adjusts the engine idle speed. The valve is located on the throttle body. The valve is controlled by a duty cycle signal from the PCM and allows air to bypass the throttle plate in order to maintain the proper idle speed.
Removal & Installation

  1. Disconnect the negative battery cable.
  2. Detach the IAC solenoid connector.
  3. Remove the two retaining bolts and remove the IAC solenoid and gasket from the throttle body.
  4. Installation is the reverse of the removal procedure. Use a new gasket and tighten the retaining bolts to 71-97 inch lbs. (8-11 Nm).

Nov 28, 2009 | 1999 Mercury Grand Marquis

1 Answer

My RPM is always at 3000


it sounds like you have a stuck IAC, Idle Air Control Valve. It meters air in when the throttle plate is colosed (foot off gas).

Autozone can scan for fault codes for free.

May just need cleaning. Try that first.

Idle Air Control (IAC) Valve —2.0L SPI Removal
  1. Disconnect the idle air control (IAC) valve electrical connector (air cleaner outlet tube removed for clarity).
747ea95.gif
  1. Remove the IAC valve.
2ed0f91.gif
  1. Remove and discard the IAC valve gasket.

May 18, 2009 | 2000 Ford Focus

1 Answer

Car sputters or dies when idling, but starts fine.


I suspect you have an idle circuit issue. When the thottle is closed, the throttle valve is almost closed (like 95%). The linkage on the throttle body is against the hard stop.
SO, when idling you need a way to let enough air into the engine to maintain an idle speed. The IAC, Idle Air Control valve is the way you do that and the engine computer controls the rate of air flow.
Sometimes it gets plugged up so you can clean it with a little carb cleaner. Might have to take it apart.
Also, you have a MAF, Mass Air Flow sensor that tells the computer how much air is flowing through the air cleaner intake at any time. The sensor gets coated with varnish and vies a false reading. Clean it gently with carb cleaner and a toothbrush.
Other than that, I would go to an auto parts store that can run a computer scan for free to see if you have any fault codes stored. They will tell you next stpes.

I assume you 2.0L SPI engine & not Zetec.


Idle Air Control (IAC) Valve —2.0L SPI Removal
  1. Disconnect the idle air control (IAC) valve electrical connector (air cleaner outlet tube removed for clarity).
3bd46d2.gif
  1. Remove the IAC valve.
d3f41d5.gif
  1. Remove and discard the IAC valve gasket.
cdecc8a.gif Mass Air Flow (MAF) Sensor Removal
  1. Remove the air cleaner outlet pipe.
  1. Disconnect the mass air flow (MAF) sensor electrical connector.
1d278bc.gif
  1. Remove the MAF sensor.
1fcb900.gif
clean element inside carefully


PS. A good running engine makes for a better running transmission

Mar 02, 2009 | 2003 Ford Focus

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