icm bad??
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icm bad??
what does the icm do and what the systoms of its possible failure. my 1200c was running very rough at idle had it tunedup &rejetted now it idles real fast until you come to a stop then it slowly comes down to its normal idle. i have been told i now need a new icm doesnt make sense to me 2005 1200custom new plugs @oil@filter i did a diagnotic test (system code) there where no dtc codes but 32883-04 came up. this is the icm. what is the function of the icm and what are the visual or other signs of it going bad. this is an expensive item i would like to know more about the icm and its actual funtion cant get a decent reply from hd must be a big secret!!!!
Last edited by biker jim03; Jul 14, 2010 at 04:13 PM. Reason: give a better explanation of the problem
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Joined: Feb 2007
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From: Boynton Beach, FloriDuh
Step #1 - What year is your bike??????????????????
That sounds like a bike with EFI which has an ECM
04-06 have an ICM
07 & up have an ECM
now it idles real fast until you come to a stop then it slowly comes down to its normal idle
04-06 have an ICM
07 & up have an ECM
Last edited by cHarley; Jul 14, 2010 at 02:30 PM.
Road Captain
Joined: May 2010
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Tuned up?
What is a tune up?
On the newer bikes, that is replacing spark plugs as far as I know, as the timing is preset, there are no points, etc.
A rough idle can be worn out plugs, or wires, and in the carb models, carb problems (loose jets, float level off, dirt, vacuum leak).
The fuel injected models are like cars, they have idle speed control valves, the computer adjusts the idle speed automaticly, but there might be a learning process, or a vacuum leak could hose it up.
Fuel injected models also have diagnostics built in, which can tell you what is wrong.
Brett
What is a tune up?
On the newer bikes, that is replacing spark plugs as far as I know, as the timing is preset, there are no points, etc.
A rough idle can be worn out plugs, or wires, and in the carb models, carb problems (loose jets, float level off, dirt, vacuum leak).
The fuel injected models are like cars, they have idle speed control valves, the computer adjusts the idle speed automaticly, but there might be a learning process, or a vacuum leak could hose it up.
Fuel injected models also have diagnostics built in, which can tell you what is wrong.
Brett
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
what does the icm do and what the systoms of its possible failure. my 1200c was running very rough at idle had it tunedup &rejetted now it idles real fast until you come to a stop then it slowly comes down to its normal idle. i have been told i now need a new icm doesnt make sense to me 2005 1200custom new plugs @oil@filter i did a diagnotic test (system code) there where no dtc codes but 32883-04 came up. this is the icm. what is the function of the icm and what are the visual or other signs of it going bad. this is an expensive item i would like to know more about the icm and its actual funtion cant get a decent reply from hd must be a big secret!!!!
There is really no control circuit on a carbed Sporty that can hold the RPM at a high idle and then drop it off as you come to a stop. (Other than your right wrist) The carb is the source of vacuum for the bike, such as for operating the vacuum controlled petcock, but it is not a vacuum controlled device.
Tuned up?
What is a tune up?
On the newer bikes, that is replacing spark plugs as far as I know, as the timing is preset, there are no points, etc.
A rough idle can be worn out plugs, or wires, and in the carb models, carb problems (loose jets, float level off, dirt, vacuum leak).
The fuel injected models are like cars, they have idle speed control valves, the computer adjusts the idle speed automaticly, but there might be a learning process, or a vacuum leak could hose it up.
Fuel injected models also have diagnostics built in, which can tell you what is wrong.
Brett
What is a tune up?
On the newer bikes, that is replacing spark plugs as far as I know, as the timing is preset, there are no points, etc.
A rough idle can be worn out plugs, or wires, and in the carb models, carb problems (loose jets, float level off, dirt, vacuum leak).
The fuel injected models are like cars, they have idle speed control valves, the computer adjusts the idle speed automaticly, but there might be a learning process, or a vacuum leak could hose it up.
Fuel injected models also have diagnostics built in, which can tell you what is wrong.
Brett
Road Captain
Joined: May 2010
Posts: 606
Likes: 2
If its a carbed bike, the carbs are constant velocity I think, in which the slide is actually vacuum operated, and that might be sticking, throttle cable adjustment, etc.
Why add all those sensors and diagnostics on a carb bike?
Dit they have some sort of system that allowed the electronics to adjust the mixture?
Brett
Why add all those sensors and diagnostics on a carb bike?
Dit they have some sort of system that allowed the electronics to adjust the mixture?
Brett
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
If its a carbed bike, the carbs are constant velocity I think, in which the slide is actually vacuum operated, and that might be sticking, throttle cable adjustment, etc.
Why add all those sensors and diagnostics on a carb bike?
Dit they have some sort of system that allowed the electronics to adjust the mixture?
Brett
Why add all those sensors and diagnostics on a carb bike?
Dit they have some sort of system that allowed the electronics to adjust the mixture?
Brett
For better control of ignition timing, which means better controlled combustion under varying loads, which equals lower emissions.
Novice
Joined: May 2010
Posts: 24
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From: Perdido Beach, Alabama
Throttle Cable
As cHarley stated there is nothing to hold increased idle on a CV carb But for 2 things... binding cables (frayed or improperly adjusted) or the enrichener valve doing something weired.
But I would bet the Idle return cable is broken slowing the butterfly's return to idle position.
I dont think that the ICM could even hold the ignition timing high enough to cause a significant rise in idle.
But I would bet the Idle return cable is broken slowing the butterfly's return to idle position.
I dont think that the ICM could even hold the ignition timing high enough to cause a significant rise in idle.
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