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Old 05-18-2017, 08:23 PM   #1
DaEvil
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Idle Issue

Hello I have an 06 and the idle races when I start it . As I blip the throttle it comes down but only a little each time until it dies . I Replaced the IAC motor and checked for leaks . I have no codes . Anyone have any ideas ? maybe the map sensor ?
Thanks in advance
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Old 05-20-2017, 01:36 AM   #2
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Quote:
Originally Posted by DaEvil View Post
Hello I have an 06 and the idle races when I start it . As I blip the throttle it comes down but only a little each time until it dies . I Replaced the IAC motor and checked for leaks . I have no codes . Anyone have any ideas ? maybe the map sensor ?
Thanks in advance
Are the throttle plates adjusted correctly. Could be they are closed completely.How about trash in the iac area could be a look at also.
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Old 05-20-2017, 04:25 AM   #3
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Everything is clean And the throttle plates are good. I got a map sensor today I'll put it in tomorrw
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Old 05-20-2017, 08:12 AM   #4
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Originally Posted by DaEvil View Post
Everything is clean And the throttle plates are good. I got a map sensor today I'll put it in tomorrw
Map sensor controls fuel and timing. Can't see a connection to rpm.
If the IAC has been replaced and you've done an intake leak test look at items that control the IAC motor. It gets data from the engine temp sensor and VSS and the calibration, then the ECM sets steps accordingly. I'd be checking the ETS first as this will call for a high rpm as when engine is cold. It will also call for rich mixture. The dying part with throttle blips seems to support that it is getting flooded out after the initial high rpm starts. If , even when the engine warm it struggles to run, and run rich, I'd look there. The VSS also controls the IAC but it shows up as a stalling problem when coming to a stop, not so much in your case.
What is your idle rpm when first started? My cal shows 1505 at the coldest but a failed sensor or faulty one could raise that to 1800 or more. A code may not be thrown unless the sensor or wiring is totally screwed.
Ron
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Old 05-20-2017, 11:38 AM   #5
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Originally Posted by rbabos View Post
Map sensor controls fuel and timing. Can't see a connection to rpm.
If the IAC has been replaced and you've done an intake leak test look at items that control the IAC motor. It gets data from the engine temp sensor and VSS and the calibration, then the ECM sets steps accordingly. I'd be checking the ETS first as this will call for a high rpm as when engine is cold. It will also call for rich mixture. The dying part with throttle blips seems to support that it is getting flooded out after the initial high rpm starts. If , even when the engine warm it struggles to run, and run rich, I'd look there. The VSS also controls the IAC but it shows up as a stalling problem when coming to a stop, not so much in your case.
What is your idle rpm when first started? My cal shows 1505 at the coldest but a failed sensor or faulty one could raise that to 1800 or more. A code may not be thrown unless the sensor or wiring is totally screwed.
Ron
And check all ground connections.
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Old 05-20-2017, 03:44 PM   #6
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you may want to check throttle cables for fraying at top or sticking.this will upset the iac .
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Old 05-20-2017, 07:22 PM   #7
DaEvil
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Originally Posted by rbabos View Post
Map sensor controls fuel and timing. Can't see a connection to rpm.
If the IAC has been replaced and you've done an intake leak test look at items that control the IAC motor. It gets data from the engine temp sensor and VSS and the calibration, then the ECM sets steps accordingly. I'd be checking the ETS first as this will call for a high rpm as when engine is cold. It will also call for rich mixture. The dying part with throttle blips seems to support that it is getting flooded out after the initial high rpm starts. If , even when the engine warm it struggles to run, and run rich, I'd look there. The VSS also controls the IAC but it shows up as a stalling problem when coming to a stop, not so much in your case.
What is your idle rpm when first started? My cal shows 1505 at the coldest but a failed sensor or faulty one could raise that to 1800 or more. A code may not be thrown unless the sensor or wiring is totally screwed.
Ron



Not sure what the ETS is but I changed the MAP this morning ,reset the plates and adjusted the throttle cables .All seems good ,rode it over 100 miles stopping at a lot of bars and it ran flawless !!!
Thanks for all the help .
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1972 Shovel
1989 Yamaha XT 600
1985 Honda CR 250
1972 240 Z -LS1/6 Speed
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Old 05-21-2017, 09:57 AM   #8
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Quote:
Originally Posted by DaEvil View Post
Originally Posted by rbabos View Post
Map sensor controls fuel and timing. Can't see a connection to rpm.
If the IAC has been replaced and you've done an intake leak test look at items that control the IAC motor. It gets data from the engine temp sensor and VSS and the calibration, then the ECM sets steps accordingly. I'd be checking the ETS first as this will call for a high rpm as when engine is cold. It will also call for rich mixture. The dying part with throttle blips seems to support that it is getting flooded out after the initial high rpm starts. If , even when the engine warm it struggles to run, and run rich, I'd look there. The VSS also controls the IAC but it shows up as a stalling problem when coming to a stop, not so much in your case.
What is your idle rpm when first started? My cal shows 1505 at the coldest but a failed sensor or faulty one could raise that to 1800 or more. A code may not be thrown unless the sensor or wiring is totally screwed.
Ron



Not sure what the ETS is but I changed the MAP this morning ,reset the plates and adjusted the throttle cables .All seems good ,rode it over 100 miles stopping at a lot of bars and it ran flawless !!!
Thanks for all the help .
ETS is engine temp sensor. Generally a failed MAP sensor, the bike will not even run, or very poorly if it does. One of the most reliable sensors there is, regarding failures. Stranger shit has happened but you made 3 changes at the same time so hard to tell which could have been the cause. Anyway it seems fixed. Enjoy.
Ron
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Old 05-21-2017, 10:51 AM   #9
DaEvil
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Ron,
Thank you very much for your help and knowledge . It is greatly appreciated !
And I'm off to ride some more so I'll keep my fingers crossed let the problem is fixed
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Old 05-24-2017, 06:40 AM   #10
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Quote:
Originally Posted by rbabos View Post
...
...I'd be checking the ETS first as this will call for a high rpm as when engine is cold. It will also call for rich mixture....
...
Searching a Harley service manual for "ETS" won't produce any hits. The acronym Harley uses for the engine temperature is ECT = engine coolant temperature.
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Old 05-24-2017, 07:12 AM   #11
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Searching a Harley service manual for "ETS" won't produce any hits. The acronym Harley uses for the engine temperature is ECT = engine coolant temperature.
I stand corrected. It was my personal acronym.
Ron
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