Throttle stop screw adjust
Grand HDF Member
Joined: May 2014
Posts: 3,843
Likes: 1,174
From: florida
there isn't anything in the manual on this IIRC. turn the screw till it just touchs, the 1/4 turn after that. You are going to want to double check your tps values and IAC steps. i dnt remember the TPS being adjustable, so you might have to get the value from the FSM, and trun the screw in till it reaches that value.
normally this screw doesn't need adjustment, unles it falls out, ( I have seen it)
if you are trying to adjust this screw to compensate for something else being wrong, you might end up going down a rabbit hole.
m
you just need it to open enough for the IAC to work correctly.
normally this screw doesn't need adjustment, unles it falls out, ( I have seen it)
if you are trying to adjust this screw to compensate for something else being wrong, you might end up going down a rabbit hole.
m
you just need it to open enough for the IAC to work correctly.
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Road Master
Joined: Jun 2013
Posts: 1,239
Likes: 1,171
From: St. Catharines, Ontario
Ive been experiencing engine dying when hot at idle. Cleaned IAC and while MUCH better , continued to die occasionally before IAC steps increase to hold idle at 978 rpm . I moved the throttle stop in slightly and again some improvement but my caution is stopping me from proceeding without sound advice on how to set it correctly. As I moved it it did not change the Throttle Position %.
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Seasoned HDF Member
Joined: Mar 2010
Posts: 38,605
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From: Honah Lee
It provides the base stop for the butterfly. The IAC determines the rest from cold start and warm up.
My service manual if that's the one you are referring to is factory set.
I assume to a predetermined amount of air going through with butterfly closed on the stop and IAC shut. I am at a loss as how even a Harley shop could do that.
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Road Master
Joined: Jun 2013
Posts: 1,239
Likes: 1,171
From: St. Catharines, Ontario
The screw is behind the air cleaner backplate. and acts on the lever that moves the throttle plate. I believe you're correct that the ECM knows how much air is coming around the plate and calculates how many steps to set the IAC. It is underestimating and then increases the steps but not always fast enough and she dies . They're should be an initial setup doc for this mechanical stop, that allows the airflow to match what the ECM is calculating with.