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Author Topic: R&R of Harley Davidson IAC (Idle Air Control) - DIY  (Read 2227 times)

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June 23, 2017, 04:25:05 AM
Read 2227 times

J F Go

Community Advocate
Changed out the IAC valve in my 07 SERK today.

Note: The IAC (Idle Air Control) is found on all the Delphi Fuel Injected models of HD motorcycles with the exception of when Harley switched the Touring models over to TBW (Throttle By Wire) in 2008. On the 2008 Touring models and years after that you will find that those models use a TCA (Throttle Control Actuator) that is not serviceable and if failed will require the replacement of the induction module.

With the service manual it went rather smooth. I'm going to list how I went about doing it in case someone else would like to do it themselves. Because you will need to drain the fuel tank try to run as much of the fuel out before you begin. Also make sure your motor is cool as well.

First I removed the air filter, then I removed the 15 amp fuse for the fuel pump,which is located under the right side cover. Start the motor and let it run out of fuel.

Next you will need a 5/16 diameter piece of hose with 3 hose clamps and 2 bolts that will fit snugly into the end of the hose. You need these items in order to drain the fuel tank. It will be a lot easier to drain and remove the tank if you have some help. After you have drained the tank disconnect the fuel line from under the left side of the tank. The manual says you only need to partially remove the tank but it will be a much easier procedure if you just get it out of the way. After you have drained the tank unbolt the gauge console from the tank and just lay in on a blanket on the rear fender gauges side down. Disconnect the breather tube from the tank. Lift the tank enough to disconnect the electrical connector under the tank. Completely remove the tank from the bike.

Next you will need to remove the Front Stabilizer Link. This needs to be removed in order to have access to the inside screw that is holding the plate that holds the IAC valve in place. Unplug the electrical connection from the IAC valve.  Then you will need a T-15 hexagonal "Alan" style wrench ( the longer the better) and remove these two screws from the plate that holds the IAC valve in place. After you remove the screws lift the plate straight up as much as you can, which won't be much, then tilt it at about 45 degrees towards the frame and at about the 2 o clock position til it goes over the IAC valve. (It's very tight getting it over the top of the IAC valve.) Remove the valve.

Make sure the old "O" ring comes out of there and clean up the area as much as possible. Put a thin layer of oil on the new "O" ring and install the new IAC valve. put a little di-electric gel on the exposed parts of the electrical connector before you plug it back into the IAC valve.

Now go ahead and put it back together. My friend and I did this on his lift and with two of us it took about four hours. Hope this will help someone down the road.  ;D 8)

Below are few pictures that will help you identify the induction module and the IAC and its connector.
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June 26, 2017, 07:51:00 AM
Reply #1


Supporting Member
Good information j f go! Thanks for taking the time to write this up and share it.
Two Lane Highway

June 26, 2017, 09:36:57 AM
Reply #2

J F Go

Community Advocate
Good information j f go! Thanks for taking the time to write this up and share it.
Thanks. And a big shout out to Larry as well, for without his help it wouldn't have been so complete.


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