Where is the fuel injection idle air control valve located

Well then you have a problem with the IAC - idle air control valve , air fuel mixture , mass air flow sensor , vacuum leak or some other problem with electronic fuel injection , OBD 2 ,emissions etc... There is an idle speed , minimal setting .Adjusting this will throw off the computer system , check engine light will come on an you won't be able get it to go out ! The PCM - engine computer controls the idle speed through the use of the IAC - motor or valve . Idle Air Control Valve You need to have it fix properly ! Check engine light on ?

If the vehicle has a fuel injected engine with ECU (computer) then there is no such screw. The computer controls the idle speed through the Idle Air Control valve, which can become dirty. The IAC can be cleaned then.
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Not in less than 25 words, but for your reading pleasure - here you go...There is no "idle screw" on your model mercedes. It is a fuel injected (in other words, not an older normal aspirator type carbuertor), computer controlled idle/air mixture. There is an idle/air speed control valve part (see picture ) that connects to the idle/air control unit (another programmable computer - one of about 20 in this model) that determines idle speed and air/fuel mixture. Mercedes is top of the line, but really too complicated for the average joe to work on. Best to pay the man and take to a mercedes specialist shop.

Depends on what type of car it is, if its got a carb there is a little screw in front of the throttle (there is a cable coming from the fire wall to the top of the motor) turn it in to increase and out to decrease. If it is fuel injected you will need to remove the air box and locate the throttle body. Then locate the screw adjustment and turn it in to increase throttle. If it is fuel injected you will probably need to check the mass air flow sensor, throttle position sensor, and the O2 sensor.

Hi.

Since the car is electronic injection and not carb engine you cannot regulate the idle manually. The idle fuel mixture to be injected is automatically determined by the ECU (the car main computer) depending on the inputs delivered from different parts. If the car is idling too high it means that there is a defective part.

Parts that must be tested are the following:

Idle air control valve and solenoid, also called IAC valve. The part is located on top of engine and determines amount of air to be injected when idle.
Vacuum system. The system has many different functions. Test the system for leaks that may result in lean mixture and other collateral problems.
O2 Sensors located in the exhaust system.
Air filter.
MAF sensor and IAT sensor located in the air intake.
Throttle position sensor.

Do also a diagnostic trouble code scanning. If there are codes stored they will help to identify the problem.

Regards.

Ginko

The idle speed is controlled by an Engine Control Module (ECM).
It needs to be put on a computor to be checked.
The idle air valve provides the control for constant idle speed. In order to set the correct air valve opening to achieve constant idle speed, the fuel injection control unit uses information from the air mass meter, A/C switch, throttle valve switch and the ignition control unit (RPM signal) to regulate the output current to idle air valve. This means, there is alot of things that can make the idle speed go up or down...Hope this was some help to you??

no idle control sensor but it has both an IAC, idle air control valve and a T, throttle position sensor
both are located at the throttle body

attached to the throttle body,looks like an electric motor bolted to a square piece with the corners notched out,with 2 wire connector on the end.

1. CHECK FOR VACUUM LEAKS
2. Throttle body or egr valve carbon build up
3. Tps Bad? any Codes ?
4. CARB/INJECTION Cleaner Spray into intake While at Approx 3500 RPM
5. STP Feul Injecttion cleaner for TANK Pore it in W/ 1/2 tank run in on inerstate at 70-80 if u can get the COBWEBS OUT so to speak

The idle air valve (located below the throttle body) provides the control for constant idle speed. In order to set the correct air valve opening to achieve constant idle speed, the fuel injection control unit uses information from the air mass meter, throttle valve switch and the ignition control unit (RPM signal) to regulate the output current to the idle air valve. This means that the idle valve is not affected by air leaks or a jammed throttle valve.