'07 Idle Issues
Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
Likes: 85
From: Nevada
I to have a 07 Ultra Classic and I have been having the low idle issue. But like a lot of people have mentioned, I am more confused now than before. I have an appt with HD next week, but don't know if I want to spend the money on that visit just yet.
Also, I tried some of the earlier links for the TT410 and they did not work. Can someone e-mail it please? scotthill1969@hotmail.com
thanks!
Also, I tried some of the earlier links for the TT410 and they did not work. Can someone e-mail it please? scotthill1969@hotmail.com
thanks!
Thread Starter
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
I to have a 07 Ultra Classic and I have been having the low idle issue. But like a lot of people have mentioned, I am more confused now than before. I have an appt with HD next week, but don't know if I want to spend the money on that visit just yet.
Also, I tried some of the earlier links for the TT410 and they did not work. Can someone e-mail it please? scotthill1969@hotmail.com
Also, I tried some of the earlier links for the TT410 and they did not work. Can someone e-mail it please? scotthill1969@hotmail.com
1. Spray some carb cleaner into the port while the bike is running (don't overdo it). This will suck the cleaner through the IAC port.
2. With the ignition switch on but engine not running toggle the kill switch on and off every few seconds. This will activate the IAC motor while you are spraying the cleaner. To keep the cleaner from building-up inside the manifold, stuff a small rag through the butterfly to catch the cleaner as it exits the port on the inside orifice. If too much cleaner drips into the manifold and engine it will be hard to start.
If you reverse the above steps, make sure you remove the rag from the intake before starting the engine!
If that doesn't work just replace the IAC motor ($45 MSRP). That may turn out to be the ultimate fix, but I'd like to hear more success-stories after doing this first. It has worked for me so far.
Last edited by iclick; Jul 15, 2010 at 02:59 PM.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,004
Likes: 12
From: Parkton, Maryland
I believe it, as the part number for my '07 IAC suggests that it is the same part (27658-06). Is that the same number for your bike? I talked with Jamie at Fuel Moto about this on Thursday and he says that '07s seem to be plagued by this problem more than any other year. It makes me wonder if maybe HD used a bad batch of IAC motors, and it would be interesting to compare assembly dates with others who are having the same problem. Mine has an Oct. '06 assembly date.
Thread Starter
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
Likes: 50
From: Baton Rouge, LA
Which problem, high or low idle? Did you clean the IAT sensor? How did you do it while on the bike or did you remove it first?
Road Master
Joined: Dec 2009
Posts: 783
Likes: 66
From: Sacramento
Just another update, I had my ECM reflashed as per the TT410 service bulletin. I've gone better than 1300 miles since the flash and my idle problem which occurred every time I rode my bike is gone. Prior to the reflash, I replaced the TPS and set the TPS voltage with the throttle plate adjustment, cleaned out the IAC port as described in previous posts and my problem persisted (after cruising at hwy speeds, while coming to stop, idle would drop to 750 or so and then come up after the bike came to a complete stop). I've heard the ECM's on this year model were (and are) a bit twitchy. Keep in mind, this was effectively Harley's first experience using o2 sensors. That may have nothing to do with it but in closing, my problem seems to be fixed.
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Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
Likes: 85
From: Nevada
Just another update, I had my ECM reflashed as per the TT410 service bulletin. I've gone better than 1300 miles since the flash and my idle problem which occurred every time I rode my bike is gone. Prior to the reflash, I replaced the TPS and set the TPS voltage with the throttle plate adjustment, cleaned out the IAC port as described in previous posts and my problem persisted (after cruising at hwy speeds, while coming to stop, idle would drop to 750 or so and then come up after the bike came to a complete stop). I've heard the ECM's on this year model were (and are) a bit twitchy. Keep in mind, this was effectively Harley's first experience using o2 sensors. That may have nothing to do with it but in closing, my problem seems to be fixed.
6th Gear
Joined: Jul 2010
Posts: 13
Likes: 0
I`ve had the low ruff idle issue, mostly in cooler weather, another thing I`ve noticed is going down long hills decell, come to stop sign, take off and motor feels very lazy till about third gear, I almost think it`s something with retarded timing, I have heard the timing retards on decell so there`s not so much backfiring, seems like timing doesn`t advance back till you rev it up, for other that have high idle, timing could be little advanced causing high idle, I don`t know, just a thought.