Need some guidance on throttle/rpm problem. - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 25 (permalink) Old 06-12-2017, 07:28 AM Thread Starter
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Need some guidance on throttle/rpm problem.

I started having throttle issues about 2 months ago, on my 2014 Street Glide Special. It has 30,000 miles on it. At first, it was higher than normal RPM at idle, after being fully warmed up. I'd be sitting at a stop light, and the engine would jump to around 1400 RPM when it normally idles around 950-1050. It would do it for about 2-10 seconds and then come back down. I thought maybe it was the ECM just giving it some more fuel for whatever reason. Then, about two weeks ago, I noticed at a stop sign, I had to give it about 50% throttle to get any response in engine rpm. Didn't do it again until yesterday.

It only seems to do it when I pull the clutch in while shifting, or I'm at idle. I could understand the low end of my throttle being a little less sensitive, considering that's where I spend most of my throttle usage at? But I'm guessing the higher RPM could possibly be the same problem. Maybe consider remapping the ECM? Or do you guys think it's a TPS issue? I REALLY don't want to take my wiring out, considering how much of a pain it was to put in last year.
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post #2 of 25 (permalink) Old 06-12-2017, 08:54 AM
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Real glad you know what year and model you are talking about.
We sure don`t.
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post #3 of 25 (permalink) Old 06-12-2017, 09:07 AM Thread Starter
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Originally Posted by Thunder~Struck View Post
Real glad you know what year and model you are talking about.
We sure don`t.
Fixed it!
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post #4 of 25 (permalink) Old 06-12-2017, 09:10 AM
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I have no idea on the issue, but it certainly makes it obvious I don't ride enough due to a variety of factors... I have 3-4K on my 2014.

", on my 2014 Street Glide Special. It has 30,000 miles on it. "
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post #5 of 25 (permalink) Old 06-12-2017, 09:41 AM
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Just guessing here but I would think the little bump in idle is probably due to the ECM and wouldnt concern me much unless it happened a lot or got worse, but the 50% responsiveness thing seems like its probably TPS related and would worry me more.
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post #6 of 25 (permalink) Old 06-12-2017, 01:38 PM
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Do you have a tuner on it ? Stage one or any other mods ?

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post #7 of 25 (permalink) Old 06-12-2017, 03:11 PM
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Sounds like a Throttle By Wire module or a bad connection.

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post #8 of 25 (permalink) Old 06-12-2017, 05:10 PM
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TBW issue would likely throw a DTC. Did you check for active codes?

Often, high idle once the engine is warm but not when cold is related a temperature sensor failing, but I am unsure if that explains everything.

In any case, I would expect the ECM to log a diagnostic code.

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post #9 of 25 (permalink) Old 06-12-2017, 05:18 PM
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Quote:
Originally Posted by 67Duce;6287177[B
]Do you have a tuner on it ? Stage one or any other mods [/B]?
This ^^^ ?

Disclaimer : Don't believe anything I say unless you are absolutely sure that I know what I'm talking about .
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post #10 of 25 (permalink) Old 06-12-2017, 07:09 PM
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I would jump on the IAC (Idle Air Control) as being gummed up. Clean it up real good.
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