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August 22, 2017, 11:11:09 PM
HDBitchin, a Harley Davidson Forum

Author Topic: Having problems with my bike dying sometimes when I come to a stop or slow down. It acts like it's  (Read 1145 times)

August 09, 2017, 01:59:00 PM
Reply #15
Online

HDBitchin

Administrator
Below is a picture attachment of the Induction Module for your Magneti-Marelli EFI that you will have on the 2003 Fatboy. That picture shows the IAC.

I also linked below another thread that talks about cleaning the IAC. That thread talks about the Delphi version of the fuel injection that HD put on the 2004 and newer years but cleaning in general will be similar between the two versions of the fuel injection.

You are looking for an air port at the 12 o'clock position in the intake module. That port might be gummed up.


Cleaning the IAC (Idle Air Control) DIY
https://hdbitchin.com/index.php/topic,140.0.html

Have you ever seen the CEL (check engine light) come on? If so you might have an error code that might help get you going in the right direction. Here is a thread on checking the error codes...

DTC List for 2003 and Older Harleys
https://hdbitchin.com/index.php/topic,1426.0.html

One more thing. You can never have too much info!!

Harley Davidson Magneti Marelli Fuel Injection Settings - DIY 
https://hdbitchin.com/index.php/topic,1829.0.html

The above DIY topic talks about adjusting the Throttle Position Sensor to achieve a proper cold and warm idle on the Magneti Marelli Fuel Injection System.

HDBitchin aka Tank          Start your Bitchin!!
Need DIY Help? Follow this link...The Harley School of Hard Knocks @ HDBitchin»

August 11, 2017, 12:40:21 AM
Reply #16
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CZ83


Absolutely love your patch!!! Ride safe for the King!!!


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August 11, 2017, 08:27:07 PM
Reply #17
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reddog7172


Absolutely love your patch!!! Ride safe for the King!!!


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Thank you Brother, and I do. God is good !

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August 14, 2017, 07:54:00 AM
Reply #18
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NoSuperSlabs

Supporting Member
Hoping to hear good news on the issue. Any news @reddog7172 ?



August 18, 2017, 09:46:43 AM
Reply #19
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reddog7172


Hoping to hear good news on the issue. Any news @reddog7172 ?
I cleaner the IAC with carburator cleaner also cleaned my K&N air filer real good, took it for a 30 mile test run and up to this point it seems to have worked.  I am over joyed about this as I have been dealing with this problem for awhile. Thank all you guys for the help, I'm pretty sure it worked, it's running great !!!

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August 18, 2017, 10:27:28 AM
Reply #20
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HDBitchin

Administrator
That is great news! Thanks for the follow up. What was said here and your confirmation of the fix will serve to help others.
HDBitchin aka Tank          Start your Bitchin!!
Need DIY Help? Follow this link...The Harley School of Hard Knocks @ HDBitchin»

August 18, 2017, 08:05:50 PM
Reply #21
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bc45

Global Moderator
It good to see it worked out, thanks for posting the fix.

August 19, 2017, 07:08:18 AM
Reply #22
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j f go

Community Advocate
Glad that did the trick. I did that for a couple of years but ended up changing it out as it just didn't stay "fixed " long. Seems the need to spray the IAC was more and more something that had to be done. If I had known how much better the response would be, from the throttle, I would have changed it out sooner. When it gets to a point that it gets to be an "every time before I ride" type of scenario, change it out. You will be amazed at how much nicer the throttle response is. ;D 8)
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August 19, 2017, 07:12:42 AM
Reply #23
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reddog7172


Glad that did the trick. I did that for a couple of years but ended up changing it out as it just didn't stay "fixed " long. Seems the need to spray the IAC was more and more something that had to be done. If I had known how much better the response would be, from the throttle, I would have changed it out sooner. When it gets to a point that it gets to be an "every time before I ride" type of scenario, change it out. You will be amazed at how much nicer the throttle response is. ;D 8)
Yes, I'm getting ready to order a new one this week, and put it on there.  Thank all of you brothers for your help. God bless !

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