High idle. IAC problem?
Seasoned HDF Member
Joined: Mar 2021
Posts: 18,272
Likes: 3,684
From: backwoods
My 2007 would take off screaming once in awhile. Turned of and on I think. Hasn't done it in years. I do clean the the port behind the air cleaner at 11 oclock. But that symptom is stalling when coasting. But maybe related. I clean mine every couple years, and been over 10 years since the idle took off. Maybe did 3-4 times.
Only thing that has changed is I clean it. But I was cleaning back then too, I believe. But I have not repalced any related parts, and have not tuned it since.
Only thing that has changed is I clean it. But I was cleaning back then too, I believe. But I have not repalced any related parts, and have not tuned it since.
Thread Starter
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Cruiser
Joined: Jan 2020
Posts: 145
Likes: 18
From: Mass
Yeah I'm thinking either that or a hairline Crack in the TB I can't see. I'd rather not put the guy on blast will PM you if you'd like. Anyone know any companies that bore 46mm to 50mm? Hillside still do it? Found Baisley performance online. Going to call them tomorrow.
Stellar HDF Member
Joined: Sep 2007
Posts: 2,458
Likes: 672
From: Vancouver Island B.C.
Did you run the bike to check the iac? It should be around 30 steps at 105C. Looking at the movement I suspect it will drop to zero.
Road Warrior
Joined: Mar 2013
Posts: 1,923
Likes: 587
From: Alorton, Illinois
What does correct mean? If idle is high and with the way your throttle blade fits. I would assume the IAC would want to be closed. This is not correct when the ecm is in idle mode. The IAC needs to open some during idle. This way it has control over idle air. Is the IAC closing all the way and then parking in an open position with a key on cycle? You should be able to visually see this.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,899
Likes: 8,005
From: poway
Assuming the facts are correct, if covering the IAC port does not change the idle, and the ECM says the IAC is at say 60 steps. There is something wrong with the IAC stepper.
If OP had the throttle body bored, what other things were done to the bike?
If OP had the throttle body bored, what other things were done to the bike?
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Seasoned HDF Member
Joined: Mar 2010
Posts: 21,093
Likes: 7,622
From: Poolville
I think the OP should send the throttle body out and see if somebody can make a new throttle plate for it..
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,899
Likes: 8,005
From: poway
If you take a look at the video that he put online that shows when he's operating the throttle, you can see the throttle plate moving left and right.. There's way too much gap in there.. The motor is sucking are past the massive gaps..
I think the OP should send the throttle body out and see if somebody can make a new throttle plate for it..
I think the OP should send the throttle body out and see if somebody can make a new throttle plate for it..
BTW Where is the video?