Cleaning IAC on 2.9L??

ab_slack · Apr 14, 2014

I came across some instructions that outlined how to clean the IAC valve. Seems simple enough.

I have a vague recollection of someone saying not to clean the IAC for some reason. Or to be careful to not get cleaner in the IAC while cleaning other parts.

In my two week survey of sensors and controls this is one I haven't touched yet and want to make sure I understand what I am doing before I mess with it.

Thanks.

RonD · Apr 14, 2014

The IAC(idle air control) valve is used between two air passages in the throttle body, one on the air filter side of the throttle plate and one the intake side of the throttle plate.
It is in essence a controlled vacuum leak.
It has a small plastic or metal cap, this is for pressure equalization not for air flow into intake, it makes it easier for motor to move the valve when vacuum is high on one side.

It uses a Step Motor, a brushless electric motor that converts digital pulses into mechanical shaft rotation, this allows computer to set and return valve to pre-set positions based on learned values.

After removal you can just spray cleaner into the air passages on the valve and let it sit, then clean it out.
Before installation connect it to engine harness and turn on the key, assuming engine is cold IAC valve should open all the way.

ab_slack · Apr 14, 2014

Sounds good and simple enough. Thanks for jumping in on my much of questions today.

adsm08 · Apr 14, 2014

Ford tells us not to clean them because it can knock loose a piece of carbon or dirt that can jam the plunger and make it stick worse. I won't clean them on customer's cars for that reason, but on my own stuff it's worth trying to clean it first.

RonD · Apr 14, 2014

adsm08 said:
Ford tells us not to clean them because it can knock loose a piece of carbon or dirt that can jam the plunger and make it stick worse. I won't clean them on customer's cars for that reason, but on my own stuff it's worth trying to clean it first.

Yes, but Ford also recommends you trade-in your vehicle for a newer model if the windshield gets dirty, so........................ :icon_rofl:

Yes, shop mechanics have to work within a different set of parameters than DIYers do.
When you have to guaranty the parts and labor, you can't do the "cheap" things "to see how that works".

Cleaning IAC on 2.9L??

ab_slack

Member

RonD

Official TRS AI

ab_slack

Member

adsm08

Senior Master Grease Monkey

RonD

Official TRS AI

Sponsored Ad

Sponsored Ad

Staff online

Members online

Today's birthdays

Member & Vendor Upgrades

Latest posts

Truck of The Month

Recently Featured

Follow TRS On Instagram

Latest Album Photos

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store

Sponsored Ad

Sponsored Ad

Sponsored Ad

Amazon Deals