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11

More than likely it's not flowing through the IAC, but rather around the throttle body. In most cases this is done to keep the throttle plates from freezing when it's cold outside. The coolant running through there can provide a lot more heat than is normally available without it, even with a cold vehicle. They had the same type thing on the 4th Gen Camaro....


6

This wont do any damage to your engine until you have an accident making a mistake with the pedals:) The IAC would only doing the same function that you are doing manually. I do think you have more of a problem than the IAC being faulty, since it should just add extra air when you switch things on like the lights, air con etc. Maybe your throttle ...


5

If you have the 2.3L 4cyl, it should be here just behind the throttle body on the passenger side: If the V6 (either 3.0 or 4.0), I think it should be right on top of the intake like it is on this V6 Escape: If it isn't there on the V6, you should still be looking for the same shaped part. It should be on the outside of the intake near the front and is ...


4

As HandyHowie said, this won't cause any damage. However, there is a better way, based on the assumption that you have a foot on the brake because you leave the car in D at the lights. If the car will still idle in N with a bad IAC, select N as you're coming to a stop and put it back in D as you press the gas pedal to set off again. Make sure the revs are ...


4

The use of the IAC and coolant running through it are just as you speculated: to prevent icing. In most places there really aren't any issues with the freezing issue. Even in cooler climates, there usually aren't any issues. As we all know, when there is a tremendous amount of air moving in/around/over a metal object, there is usually a cooling effect, ...


4

The manual you linked to explains what they're used for. The AACV is the main idle speed control while the FICD is used to supply additional air to the engine when the AC is turned on. AACV (Page EC-GA-117) This system automatically controls engine idle speed to a specified level. Idle speed is controlled through fine adjustment of the amount of air ...


3

The reason to use two is a matter of scale. Fast idle requires a high volume of air but the exact amount is not critical. So a big bore with a cheap slow moving plunger is all that is needed. Idle requires a much smaller amount of air but a much higher degree of control than fast idle. A more expensive fast cycling shutter valve is the most common design. ...


2

Interesting question, assuming by 'taking it apart' you mean removing the IAC. In that case the only option that I can think of is a back-to-back comparison with another car of identical spec. Assuming that all components on both vehicles were identical spec and condition, and that the operating conditions (temp, engine speed etc) were identical, you could ...


1

As all circuits being used are electiral (power windows/brake light switch) i would suggest when it warms up, something loose is expanding and causing shorts which are affecting the running circuit which could be reducing fuel/spark effort


1

My 98 Rav 4 would do basically the same thing. Mine turn out to egr valve not closing and opening right. Took it apart cleaned cleaned it good in side and out put it back on no more ideling down under load.


1

Here you go, It's fairly straight forwards. If you have a funny idle after replacing the parts and it wasn't there before. Recheck for vacuum leaks. If none are found reset the Keep Alive Memory with a scantool. Regarding your code I would try cleaning the IACV, throttle body and resetting the KAM first. Gloves are personal preference. I wear them because ...


1

I'd be surprised if the heating is extraneous in general – too much cost and engineering for a component without a purpose. But, you might be able to get away without the heating. It will depend on where you live, how you drive, the weather conditions, etc. With a fuel injected engine (assuming it isn't throttle body injection) you don't have the problem of ...


1

My 94 Acura Integra (should be the same on most Hondas of the time) has a Fast Idle Thermo Valve (FITV) and an Idle Air Control Valve (IACV). The FITV has coolant flowing through it and opens/closes an air valve based on coolant temperature. It is completely mechanical. As the name implies, the FITV sets the high idle when the engine is cold, similar to ...


1

From my research on surging idle..A possible solution-TPS(Throttle Position Sensor) connector. I read on a diagnostic webpage that this guy disconnected and then reconnected it and the problem was solved for 3 weeks. In theory it makes sense when the ECM loses the input from the TPS sensor it falls back on a default setting until the TPS is reacquired. Maybe ...


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