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IMy P95 ontiac sunfire with a 2.2 idles really high. Does it have a IAC valve intake air temp sensor throttle pos. Sens

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  • Cars & Trucks Master
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The inlet air temperature sensor located on the air intake duct.if you have 1995 model IAC located on backside of the upper intake manifold if you have 1998 - 2002 IAC located backside of the throttle body.

Posted on Jan 13, 2013

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Yes it has a idle air control motor try cleaning it or replace

Posted on Jan 13, 2013

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SOURCE: transmission won't shift

Throttle position sensor

Posted on Jan 07, 2009

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SOURCE: 1997 buick lasabre custom high idle, transmission, stalling

had same problem i would check the Idel Air Valve and also check all of your vaccum hose lines makeing sure there are no cracks or splits in rubber connectors if there is repair immediatelt because over time they start to dammage the internal parts fo the engine and if youve replace tps mass air etc. sounds like a vaccum hose problem

Posted on Feb 10, 2009

landsend
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SOURCE: rough start on 2001 escape

how about a simple tune-up?  Plugs and filters.

Posted on Apr 01, 2009

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SOURCE: codes 171 and 174 2001 ford winstar

dont take soo much in consideration after you have make all this things, some time is on only for any wire faulty, or a shrt electrical arc in any place in wire system. ask auto tap mechsnics for this maybe they have similar case before.

Posted on Apr 06, 2009

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SOURCE: my air mass sensor, throttle valve actuator problem.

yoy need to change both the Air Mass Sensor and throttle valve actuator to eliminate this problem. The actuator is pretty pricey but thats the ONLY solution i'm afaraid.

Posted on Jun 09, 2009

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Code p0507


possible causes are:

Dirty throttle body
Electric throttle control actuator incorrectly adjusted/faulty/damaged
Air leak on Intake
Poor electrical connection to the Intake Air Control valve

P0507 KIA Idle Air Control IAC System RPM Higher Than Expected

May 14, 2014 | 2003 Kia Sedona

1 Answer

Hyndai h1 codes p0335 p1131 p0180 p1123 p1120 p0121 p1127 p0110


Wow do You have a bunch of different Sensor and Circuit Problems

0110 Intake Air Temp Circ Malfunction
0121 Throttle Position sensor A Range Problem
0180 Fuel Temperature Sensor A Circuit Malfunction
0335 Crankshaft Pos Sens A Circ Malfunc
1120 Throttl Pos Sensor Circuit
1123 Throt Pos sens Higher then Expected
1127 Exhaust Not Warm Downstream 02 Temp Sensor
1131 Lack of Sig H02S Sens Indicates Running too Lean
Learn more about codes here http://www.troublecodes.net/OBD2/Pcodes/

I would guess with all this You may Have a Connection Problem or a Computer Issue Get the codes reset and monitor as soon as check engine light comes on to see what codes com up first and what codes are pending
Good Luck Rickie

May 13, 2014 | 2010 Hyundai H-1 Travel

1 Answer

Where is the aic on a 94 sierra


Its located right on the throttle body. If your talking about the air intake temp sensor, thats mounted by the air filter or in the plastic tube that goes off the throttle body to the air box, its a 2 wire hook up. The idle air control "iac" is located on the throttle body side. "iac" idle air control. "ait" is air intake temp. 2 totally diff sensors.

Feb 20, 2013 | 1994 GMC Sierra

1 Answer

High idle o n a 1996 chrysler concorde. have change the tps and the idle air control valve. i think its a vacum line but i dont know which one. which one s effect the idle


High idle is usually caused by a vacume leak. First place to check is the cold air intake manifold. All hoses, throttle body, and sensors. Throttle Position(TPS), Mass Airflow(MAS), Idle Air Control Motor (valve) IAC. Controls Idle speed

A malfunctioning throttle system can cause both a high idle as well as an engine stall.

A dirty air intake or cracked air intake tube is often the culprit.

How to Fix an Engine High Idle in Under 15 Minutes

Oct 16, 2011 | 1996 Chrysler Concorde

1 Answer

Will not idle, will run if you push on the gas and hold it. No engine light indicator


you need to clean your idle air control valve ( or replace it) Spray carb cleaner does a nice job of cleaning it.

This tutorial is from autozone.com


OPERATION



The Idle Air Control (IAC) is a bi-directional motor driven by two coils. The purpose of the IAC valve is to control engine idle speed, while preventing stalls due to changes in the engine load. The IAC valve, mounted in the throttle body, controls bypass air around the throttle plate. The PCM controls engine idle speed by adjusting the position of the IAC motor pintle. The PCM pulses current to the IAC coils in small steps (counts) to extend the pintle into a passage in the throttle body to decrease air flow. The PCM reverses the current pulses to retract the pintle, increasing air flow. This method allows highly accurate control of idle speed and quick response to changes in engine load. If RPM is too low, the PCM will retract the IAC pintle, resulting in more air being bypassed around the throttle plate to increase RPM. If the RPM is too high, the PCM will extend the IAC pintle, allowing less air to be bypassed around the throttle plate, decreasing RPM.



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Fig. Typical Idle Air Control (IAC) valve components
During idle, the proper position of the of the IAC pintle is calculated by the PCM based on the battery voltage, coolant temperature, engine load and engine RPM. If the RPM drops below a specified value, and the throttle plate is closed (TP sensor voltage is between 0.20-0.74), the PCM senses a near stall condition. The PCM will then calculate a new IAC pintle position to prevent stalls.
If the IAC valve is disconnected and reconnected with the engine running, the idle RPM will be wrong. In this case, the IAC has to be reset. The IAC resets when the ignition switch is cycled ON and then OFF . When servicing the IAC, it should be disconnected or connected with the ignition switch OFF in order to keep from having to reset the IAC valve.
The position of the IAC pintle affects engine start up and the idle characteristics of the vehicle. If the IAC pintle is fully open, too much air will be allowed into the manifold. This results in high idle speed, along with possible hard starting and a lean air/fuel ratio. A Diagnostic Trouble Code (DTC) may set. If the IAC pintle is stuck closed, too little air will be allowed in the manifold. This results in a low idle speed, along with hard starting and a rich air/fuel ratio. Again, a Diagnostic Trouble Code (DTC) may set. If the IAC pintle is stuck part way open, the idle may be high or low and will not respond to changes in engine load.


TESTING



As with most all engine control sensors used in your vehicle, a thorough and proper test can only be performed by a qualified technician using a scan tool to read the data stream from the PCM. There are a few items a non-professional should check before taking the vehicle to a qualified technician for diagnosis and repair.



Check for a poor connection at the PCM or IAC motor. Inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals and poor terminal-to-wire connection. Inspect for a damaged wiring harness, especially if heavy work has recently been performed (intake manifold removal, engine removal, etc.) where the throttle body has been disturbed. Inspect for a restricted air intake system. Check for a possible collapsed air intake duct, restricted air filter element or foreign objects blocking the air intake system. Inspect the throttle body. Check for objects blocking the IAC passage or throttle bore. Excessive deposits, especially on high-mileage engines, can build up in the IAC passage and on the IAC pintle. Excessive deposits can also build up on the throttle plate, so check for a sticking throttle plate. Check for vacuum leaks such as disconnected hoses, leaks at the EGR valve and EGR pipe to the intake manifold, leaks at the throttle body, faulty or incorrectly installed PCV valve, leaks at the intake manifold brake booster hose connection, etc.



REMOVAL & INSTALLATION



  1. Disconnect the negative battery cable.
  2. Detach the electrical connector from the IAC valve.
  3. Remove the 2 attaching screws and remove the IAC valve from the engine. Remove the O-ring from the housing.

To install:



0900c15280217cd3.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. The Idle Air Control (IAC) valve is mounted on the throttle body-3.8L (VIN K) engine shown, others similar


NOTE Before installing a new IAC valve, measure the distance that the valve is extended. The measurement should be made from the motor housing to the end of the valve cone (pintle). The distance should be no greater than 1 1 / 8 inch (28mm). If the pintle is extended too far, adjustment is required, otherwise damage may occur when the IAC valve is installed. Adjust the IAC valve by compressing the pintle to achieve the correct length.


  1. Use a new O-ring, install the IAC valve and tighten the retaining screws to 18 inch lbs. (2 Nm).
  2. Attach the electrical connector.
  3. Connect the negative battery cable.
  4. The PCM will reset the IAC valve the next time the ignition switch is turned ON and then OFF .
  5. Start the engine and allow to warm to operating temperature to check idle quality.

Oct 13, 2010 | 2000 Pontiac Grand Prix

2 Answers

The engine races and the temp drops. I asked the question yesterday and was told to check the idle air control. There is not one on my model. anyone?


I'm assuming that you have idle high in the engine, and IAC fault code.

DIAGNOSTIC TROUBLE CODE (DTC) 0505 IDLE AIR CONTROL VALVE (IACV) CIRCUIT FAULT

Know Your Circuit:
* In order to regulate the air entering into the engine, the Engine Control Module (ECM) uses an Idle Air Control (IAC) Valve.
* To raise the idle rpm, the ECM handles the pintle inside the IAC valve away from the throttle body seat.
* This enables additional air to bypass through the throttle blade.
* To lower the rpm the ECM controls the pintle towards the throttle body seat.
* This successfully reduces the amount of air bypassing the throttle blade.
* A scan tool will note the IAC valve pintle position.
* The greater the count, the greater air is allowed to bypass the throttle blade.
* This DTC ensures whether a low idle condition exists as defined as 100 rpm below the desired idle rpm.

Pre -requisites For Setting the DTC:
· No intrusive tests are active.
· DTC(s) P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0131, P0132, P0133, P1133, P1134, P0171, P1171, P0172, P0201, P0202, P0203, P0204, P0300, P0336, P0337, P0341, P0342, P0351, P0352, P0402, P0404, P1404, P0405, P0406, P0443, and P0502 are not set.
· Engine is running > 60 seconds.
· Barometric Pressure (BARO) is > 72 k Pa (10.4 psi).
· Engine Coolant Temperature (ECT) is > 60°C (140°F).
· Ignition voltage ranges between 11 and 16 volts.
· The Intake Air Temperature (IAT) is > -20°C (-4°F).
· Manifold Absolute Pressure is less than 60 k Pa (8.7 psi).
· IAC valve is fully opened.
· All of the above must be met for more than 5 seconds.

dedfc5a.jpg


Diagnostic Tools:
* Probe the IAC valve electrical connection for proper mating.
* Examine the wiring harness for damage.
* See whether the throttle stop screw shows signs of distortion.
* Also inspect the throttle linkage for signs of binding or excessive wear and tear.
* The following conditions may be created by a slow or unsteady idle:

1) Fuel system very high or low.
2) Foreign material in the throttle body or in the induction system bore
3) A leaking or restricted intake manifold.
4) Excessive engine overloading. Check for seized pulleys, pumps, or motors on the accessory drive
5) Excess engine oil.


SUMMARY OF THE STEPS TO BE TAKEN
DTC P0505 Idle Air Control Valve (IACV) Circuit Fault

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Hope this help.

Apr 20, 2010 | GMC Envoy Cars & Trucks

1 Answer

Saturn 1999 sl Engine has a high idle speed. How do I find, replace, inspect IAC?


The Idle Air Control valve is located on the throttle body. If you follow the intake tube from your air filter all the way back to the intake manifold, where the intake tube connects to is the throttle body. Remove the intake tubing and you can see the throttle body.

There are two sensors on the throttle body and a vacuum line. You'll see two harnesses going to the throttle body, one is the IAC.

However, a quick diagnostic check can be done without touching the throttle body to confirm your problem. If the car has a normal idle when initially started but then rises to a higher idle and stays there BUT then if you were to shut the car off and restart it and it comes back to normal that is the Throttle Position Sensor (TPS). This is also located on the throttle body (the other sensor to the IAC). If it is the IAC it will be high and maybe fluctuate a bit.

Mar 29, 2010 | 1999 Saturn SL

2 Answers

Jaguar xj6 4.0 1990. showing fault code fuel 14, fail 14. what does this code mean ?


2 airflow sensor out of operating range 3 coolant temp sensor out of operating range 4 oxy sensor indicates full rich 5 throttle potentiometer/airflow sensor... (low throttle pot signal with high airflow sensor signal) 6 throttle pot/airflow sensor...... (high throttle pot signal with low airflow sensor signal) 7 throttle pot...idle fuel adjustment failure(idle speed??) 8 intake air temp sensor...open or shorted circuit to sensor 11 Throttle pot at idle: Throttle pot idle trim out of normal range 12 Airflow meter: MAF signal out of range 14 Coolant thermistor: Resistance out of range or static during engine warm up 16 Air thermistor: Resistance out of range 17 Throttle pot: Out of range 18 Throttle pot/Airflow: Low throttle pot signal at high airflow 19 Throttle pot/Airflow: High throttle pot signal at low airflow 22 Fuel pump drive: ECU output to fuel pump relay 23 Fuel supply: Engine running too rich 24 Ignition Drive: ECU output to ignition Amp 26 Air leak: Engine running too lean 29 ECU self check 33 Injector Drive: ECU output to injectors 34 Injector: Looks for Injector dribble 37 EGR Drive: ECU output to EGR switching valve 39 EGR check sensor: EGR not working (normally pipe blocked) 44 Lambda (O2) sensor: Poor mixture control rich or weak (or misfire) 46 Idle speed Control valve: ECU output to Coil AB 47 Idle speed Control valve: ECU output to Coil CD 48 Idle Speed Control Valve: Stepper motor grossly out of position 66 Air pump: ECU output to air pump relay 68 Road speed sensor: Seen speed < 5km/h at high engine airflow 69 Drive/Neutral switch: Seen cranking in "D" or high airflow in "N" 89 Purge Valve drive: ECU output to purge valve
this is all I could find

Nov 09, 2009 | 1990 Jaguar XJ6

1 Answer

Does a 2001 have a iat sensor?


Idle Air Control (IAC) Motor OPERATION The IAC motor is mounted to the throttle body and is operated by the engine controller. The throttle body has an air control passage that provides air for the engine at idle (when the throttle plate is closed). The IAC motor pintle protrudes into the air control passage and regulates air flow through it. Based on various sensor inputs, the engine controller adjusts engine idle speed by moving the IAC motor pintle in and out of the air control passage. The IAC motor is positioned when the ignition key is turned to the ON position.

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OPERATION Found on V6, V8 and V10 engines, the intake manifold air temperature sensor is a variable, thermister type which reacts to temperature changes. In cold air, its resistance is high. As temperatures increase, its resistance decreases.





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Fig. 2: Location of the intake manifold air temperature sensor — V8 engines

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The sensor element itself extends into the intake manifold air stream to provide input voltage to the engine controller. This signal is used along with signals from other sensors by the engine controller to determine the fuel injector pulse width.

Aug 25, 2009 | 2001 Dodge Ram 2500 Truck

2 Answers

Replacing Idle Control Valve on 97 Pathfinder, need help!


it's on the throttle body. Here's a Quest with same 3.0L engine. These often need cleaning with carb or throttle body cleaner

Idle Air Control (IAC) Valve When the engine (6007) is running but not at idle, the throttle valve controls the amount of air admitted into the engine. The powertrain control module (PCM) (12A650) increases the fuel injection output in proportion to the increased airflow to achieve the appropriate air/fuel ratio. During idle, the throttle valve is almost fully closed. It is therefore necessary for the idle air control system to supply air for combustion during idle. The idle air control (IAC) valve allows a metered amount of air to enter the intake manifold (9424). The camshaft position (CMP) sensor detects engine speed and sends a signal to the PCM. The PCM sends a duty cycle (On/Off) signal to the IAC valve which allows additional air to enter the intake manifold. Air is added by the IAC valve to maintain the set lowest idle speed at which the engine can operate. The idle speed adjusting screw allows adjustment of the airflow into the intake manifold.

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Fast Idle Control (FIC) Solenoid The fast idle control (FIC) solenoid helps maintain a constant idle speed while the air conditioning is operating. When the air conditioning is turned on, the front climate control panel sends out two signals. One signal is sent to the powertrain control module (PCM) (12A650) to engage the A/C compressor (19703). The second signal is a ground signal sent to the FIC solenoid relay, to engage the FIC solenoid. The FIC solenoid supplies additional air to adjust the increased engine load.

May 27, 2009 | 1997 Nissan Pathfinder

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