2015 ultra hard start
Thread Starter
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Cruiser
Joined: Jun 2015
Posts: 246
Likes: 28
From: Denver Colorado
2015 ultra hard start
Had a warm day and went to start the bike but it wouldn't start. Cranking was no problem battery tested at 12.62 vdc.
checked the spark plugs for spark and got shocked in the process, both are sparking. Took the air filter off and cleaned it with the k and n stuff. When cold she only wants to start with the throttle cracked a little. Any suggestions on where to look?
checked the spark plugs for spark and got shocked in the process, both are sparking. Took the air filter off and cleaned it with the k and n stuff. When cold she only wants to start with the throttle cracked a little. Any suggestions on where to look?
Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Make sure your battery connections are tight and clean , look for corrosion and breaks in the cables , especially inside the plastic cover . Also check the wiring that runs down to the starter as well , again , make sure it's clean and free from corrosion .
If that all checks out and like you say , you have good battery power , I would start looking at your fuel system . Are you getting fuel ? Is the fuel pump priming when you turn on the switch ? Filter plugged inside the tank , leak in the fuel lines inside the tank ....
While your at it , have a look at the inside of your throttle body , give it a good cleaning with some carb cleaner and a toothbrush , any carbon build up will cause it to idle poorly .
Give this a read , also have you checked for error codes ?
https://www.hdforums.com/how-tos/a/h...e-start-414174
If that all checks out and like you say , you have good battery power , I would start looking at your fuel system . Are you getting fuel ? Is the fuel pump priming when you turn on the switch ? Filter plugged inside the tank , leak in the fuel lines inside the tank ....
While your at it , have a look at the inside of your throttle body , give it a good cleaning with some carb cleaner and a toothbrush , any carbon build up will cause it to idle poorly .
Give this a read , also have you checked for error codes ?
https://www.hdforums.com/how-tos/a/h...e-start-414174
Last edited by MyFavRk; Feb 18, 2020 at 05:09 PM.
Thread Starter
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Cruiser
Joined: Jun 2015
Posts: 246
Likes: 28
From: Denver Colorado
If that all checks out and like you say , you have good battery power , yes I get power, the bike starts. It starts immediately when warm but when cold I have to open the throttle slightly would start looking at your fuel system . Are you getting fuel ? yes, when I started it without the filter on I got sprayed with gas coming out the throttle body Is the fuel pump priming when you turn on the switch ? yes you can hear it, plus the bike starts and runs inside the tank , leak in the fuel lines inside the tank ....
While your at it , have a look at the inside of your throttle body , give it a good cleaning with some carb cleaner and a toothbrush , any carbon build up will cause it to idle poorly .
Give this a read , also have you checked for error codes ? ill check it again after I rode the bike around the block a couple times.
https://www.hdforums.com/how-tos/a/harley-davidson-touring-why-wont-my-bike-start-414174 this is pretty cool knowledge
Thread Starter
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Cruiser
Joined: Jun 2015
Posts: 246
Likes: 28
From: Denver Colorado
It's only when it's a cold start does the engine keep cranking. It takes holding the throttle like 20% open it starts.
Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Ok , if your not having any issues when warmed up and it's idling , running smoothly throughout all gears ( running as it should ) , I would rule out the fuel pump as the issue .
Tell me more about the bike , is it stock , have you done stage 1 , any recent work done ?
Check your plugs , clean and re gap ... or replace ... Not sure if your a believer , but you could also run some sea foam though your fuel system , about an oz / gal .
Try resetting your TGS
Handle bar switch in run position , turn on your ignition , do not start the bike , and wait 10 seconds , then turn off for 10 seconds , repeat this procedure 4 times in a row .
If that doesn't help , try resetting your ecm -
https://www.hdforums.com/how-tos/a/h...our-ecm-413937
Tell me more about the bike , is it stock , have you done stage 1 , any recent work done ?
Check your plugs , clean and re gap ... or replace ... Not sure if your a believer , but you could also run some sea foam though your fuel system , about an oz / gal .
Try resetting your TGS
Handle bar switch in run position , turn on your ignition , do not start the bike , and wait 10 seconds , then turn off for 10 seconds , repeat this procedure 4 times in a row .
If that doesn't help , try resetting your ecm -
https://www.hdforums.com/how-tos/a/h...our-ecm-413937
Thread Starter
|
Cruiser
Joined: Jun 2015
Posts: 246
Likes: 28
From: Denver Colorado
Ok , if your not having any issues when warmed up and it's idling , running smoothly throughout all gears ( running as it should ) , I would rule out the fuel pump as the issue .
Tell me more about the bike , is it stock , have you done stage 1 , any recent work done ?
Check your plugs , clean and re gap did this before I got shocked. they were wet but I think it was due to me trying to start it so many times ... or replace ... Not sure if your a believer , but you could also run some sea foam though your fuel system , about an oz / gal .
Try resetting your TGS
Handle bar switch in run position , turn on your ignition , do not start the bike , and wait 10 seconds , then turn off for 10 seconds , repeat this procedure 4 times in a row . I'll definitely do this, but I did verify operation when I had the filter off and figuring out it starts while open around 20%
If that doesn't help , try resetting your ecm - i do have it turned with the screaming eagle tuner that's legal for my set up. I'm going to
https://www.hdforums.com/how-tos/a/h...our-ecm-413937
Tell me more about the bike , is it stock , have you done stage 1 , any recent work done ?
Check your plugs , clean and re gap did this before I got shocked. they were wet but I think it was due to me trying to start it so many times ... or replace ... Not sure if your a believer , but you could also run some sea foam though your fuel system , about an oz / gal .
Try resetting your TGS
Handle bar switch in run position , turn on your ignition , do not start the bike , and wait 10 seconds , then turn off for 10 seconds , repeat this procedure 4 times in a row . I'll definitely do this, but I did verify operation when I had the filter off and figuring out it starts while open around 20%
If that doesn't help , try resetting your ecm - i do have it turned with the screaming eagle tuner that's legal for my set up. I'm going to
https://www.hdforums.com/how-tos/a/h...our-ecm-413937
Sure. 2015 Harley Davidson ultra classic. Harley burst air cleaner. 58 mm intake. Screamin beagle 259 cams. Screamin beagle high flow headers. Screamin beagle nightstick full exhaust you know the ones where they moved the catalytic converter to the slip on. 110 cu in.
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Joined: Aug 2019
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What kind of tuner do you have and was it dyno tuned or a base map? It sounds like you need to bump up the fuel at cold start, which could make sense with the bigger throttle body and cams.
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Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Could very well be a tuning issue , did the bike start fine at any time when it was cold before , without any issues , or is this the first time it's been cold , since the modifications were done ? Could be onto something here .