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the air fuel is controled by the oxygen sensor, located in the exhaust manifold. the idle is controled by the iscv(idle speed control valve) it is located on the intake manifold opposite to the trottle body The ECM (engine computer) uses various sensors (intake air temp, engine coolant temp, throttle position, manifold air pressure sensor) and a few I'm sure I missed to determine how long to keep the fuel injectors open so that the engine has the proper amount of fuel to go with the air so the engine runs efficiently. Once the Oxygen sensor warms up to 600 degrees the computer uses the signals from the oxygen sensor to determine whether a little more or llitle less fuel is needed . There is a flat head screw on the throttle body that can be adjusted to allow a little more or a little less air which will raise or lower the idle speed.
What else can I help you with?
Chevy code 12?
The IAC the Idle Control Valve, this controls the mixture between fuel and air for the idle of your vehicle.
What is an ecm on a Chevy truck?
It stands for Electronic Control Module. It is located on the distributor & controls the fuel/air mix, idle setting etc.
Where is the automatic choke in a 1994 mark viii?
No automatic choke, has fuel injection. IAC valve (Idle Air Control) valve controls that
Why does Toyota Paseo run rough at no 1 and4 5EFE engine at idle?
A rough idle in a Toyota Paseo with a 5EFE engine could be attributed to several factors, including vacuum leaks, faulty spark plugs or ignition coils, or issues with the fuel system such as clogged fuel injectors. Additionally, problems with the idle air control valve or a dirty throttle body can disrupt the air-fuel mixture, leading to rough idling. It's essential to conduct a thorough diagnostic to pinpoint the exact cause. Regular maintenance and addressing any warning lights can help prevent these issues.
Could over revving be caused by faulty idle air control valve?
No! it only controls the air/fuel mixture at idle - it is by-passed when the engine revs-up. Generally, when there is a problem with the air control valve it causes the idle to become erratic and 'hunt' and maybe the engine keeps stalling.
How does a idle air control valve work?
An idle air control valve controls the engine idle revolutions by opening/closing to let more/less air into the throttle body (carburetor)-the car computer reads and controls the valve.
Where is the idle air control valve on a 1996 Ford Contour Sport?
its in the troudle fuel injection body if its factory there should be a white plug in it. The computer controls it. It has a little valvue in it that moves in and out for more air or less air. That's gives curb idle speed.
What is fuel press idle on 3406 cat ataac?
fuel pressure at idle, air to air after cooled 3406, caterpillar diesel engine
What controls the idle on a 94' gmc 7.4 liter engine?
Idle air control motor or IAC
What causes a diesel to idle?
Diesels run on compressed fuel and air. An injector pump sprays fuel into the cylinder and mixes it with the air. When the piston rises to the top of the cylinder it compresses the fuel / air mixture and causes the mixture to ignite powering the engine. The speed of the engine is controled by the throttle plate which controls the amount of air entering the engine as well as the metering valve on the diesel pump which controls the amount of fuel that is sprayed into the cylinder.
Is the mass air flow sensor the same as idle control valve?
No, the MAF measures the amount of air entering the engine, while the idle control valve controls the amount of air at idle.
McCulloch chainsaw carb adjustment?
The carb on a McCullouch chainsaw can be adjusted by turning the idle mixture screws. This controls how much fuel and air are mixed inside the carburetor.
