Question about 1999 Dodge Stratus

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A.I.S. (automatic idle speed) motor

Where do you find this on the engine?

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  • Dodge Master
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Its on the throttle body

Posted on Oct 27, 2008

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Posted on Jan 02, 2017

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96 dodge diesel was idLing at 1000 rpms set idle at 780 now engine won't start unless you step on fuel slightly


Automatic transmissions need to have a higher idle speed on the motor because of the load put on them by the transmission. You may have set it too low. 780 might be the idle speed with the transmission in D and the brake set.

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Chrysler 300 cuts off while idling with the AC on. It was doing it maybe once or twice a month. Lately it's been more ofton. I had a tune up and fuel filter changed in April 2014. What could be the...


replace IAC/AIS motor on throttlebody. IAC= Idle air control
AIS= Automatic Idle Speed. Same thing just 2 different names. Steps up engine RPM automatically when any load on engine such as AC, Turning, heater etc turned on.

Jul 27, 2014 | Chrysler 300 Cars & Trucks

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1998 Durango will not idle


Check A.I.S./I.A.C. motor on throttle body. Known by both names, Automatic idle speed motor (AIS) Idle Air control (IAC) . Usually mounted on side of throttle body, with 2 or 3 torx screws and it's job is to adjust idle at all times as necessary, such as when AC on, turning, etc when extra load on engine, it will increase idle as needed to overcome the load and maintain proper idle speed. You can often remove the motor and clean pintle (pointed end that goes inside throttle body) with throttle body spray cleaner as well as spray inside the port (hole) that it comes out of. Sometimes this will cure the problem for quite a while, but if only for a short time, and it happens again, replace it.

Jan 26, 2013 | Dodge Durango Cars & Trucks

1 Answer

High --1600 rpm ?? rpm idle


The normal idle speed is below 1,000 rpm...between 800 to 900 rpm. I suspect that the idle-air control motor has seized and can no longer automatically adjust the engine's idle speed. This part is also responsible for slightly increasing idle speed when the airconditioning is switched on to compensate for the added engine load. Some cars even have a "step-up" solenoid to increase idle.

When replacing the idle-air control motor, remember to clean the port that IAC motor goes into; there will be some carbon build-up that may prevent the part's cone-shaped valve from seating properly. A can of intake valve spray helped along with some Q-tips works well.



Hope this helped.

Have a great day !!!

Apr 07, 2011 | 1992 Buick LeSabre

1 Answer

I have a 1998 Acura 3.0 CL and the radio had an error 3 last week. I had to take the console and radio out in order to find the radio serial number and got the radio code from Acura, since mine was...


I don't see this as related to the console. This issue is usually caused by the idle air control valve. The valve may be bad or possibly the wiring. If it's the wiring, normally the computer will turn on the engine light.
You can check the valve operation using a common obd2 scanner in data mode.
Here is more info from autozone.com:
Engine idle speeds are controlled by the PCM through the Idle Air Control (IAC) valve mounted on the throttle body. The PCM sends voltage pulses to the IAC motor windings causing the IAC motor shaft and pintle to move in or out a given distance (number of steps) for each pulse (called counts). The movement of the pintle controls the airflow around the throttle plate, which in turn, controls engine idle speed. IAC valve pintle position counts can be observed using a scan tool. Zero counts correspond to a fully closed passage, while 140 counts or more corresponds to full flow.
Idle speed can be categorized in 2 ways: actual (controlled) idle speed and minimum idle speed. Controlled idle speed is obtained by the PCM positioning the IAC valve pintle. Resulting idle speed is determined by total air flow (IAC/passage + PCV + throttle valve + calibrated vacuum leaks). Controlled idle speed is specified at normal operating conditions, which consists of engine coolant at normal operating temperature, air conditioning compressor OFF, manual transaxle in neutral or automatic transaxle in D .
Minimum idle air speed is set at the factory with a stop screw. This setting allows a certain amount of air to bypass the throttle valves regardless of IAC valve pintle positioning. A combination of this air flow and IAC pintle positioning allows the PCM to control engine idle speed. During normal engine idle operation, the IAC valve pintle is positioned a calibrated number of steps (counts) from the seat. No adjustment is required during routine maintenance. Tampering with the minimum idle speed adjustment may result in premature failure of the IAC valve or improperly controlled engine idle operation.

TESTING The IAC can be monitored with an appropriate and Data-stream capable scan tool

Oct 02, 2017 | 1998 Acura CL

3 Answers

Idle at 250 rpm


Idle Speed Control (ISC) Motor OPERATION Eagle Throttle Body Fuel Injection (TBI) System NOTE: The Eagle TBI system is used only on 2.5L Premier engines. The Idle Speed Control (ISC) motor is mounted to the throttle body and controlled by the PCM. The throttle lever rests against the initial adjustment screw of the actuator (plunger). The idle speed is not adjustable. The initial adjustment screw is only used to establish the initial positioning of the actuator when the ISC motor has been replaced. The actuator extends or retracts to control engine idle speed and to set throttle stop angle during deceleration. Based on inputs from the various engine control system sensors and switches to the PCM supplies current to the ISC motor to adjust the actuator position for the particular operating conditions.
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Aug 05, 2010 | 1995 Dodge Spirit

2 Answers

Cooling problems


It sounds like everything is working properly. The temperature will go up when idling. The wter isn't being pumped through the system as fast. When idling, the engine runs at around 750 rpm's. When driving, even at low speeds, the engine speed is at least double that. Make sure your antifreeze is set for at least 20° below zero.

Aug 28, 2009 | 2002 Mitsubishi Lancer

1 Answer

Automatic vehicle stalls at low rpm


This is proplem with the IAC valve , try clean the valve and if that doesnt work replace it.

An IAC (idle air control) motor is designed to adjust the engine idle RPM speed by opening and closing an air bypass passage inside the throttle body

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Smith

Jul 09, 2009 | 2002 Land Rover Freelander

1 Answer

98 galant 2.4 engine speed uncontrollable after 1600 rpm


check automatic idle speed motor if equipped.

Jul 07, 2009 | 1998 Mitsubishi Galant

1 Answer

Engine cuts out


sounds like the automatic idle speed motor is malfunctioning and probably needs replaced

Jan 26, 2009 | 1994 Chrysler LeBaron

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