NT Wont start when hot??
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Joined: May 2008
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NT Wont start when hot??
Hey guys
I have an '03 fuel injected night train. I've been having an odd problem the last few times I've brought it out. I start it in the morning, ride it to work, park it for 10 hours, and it starts up fine. When I leave work and go somewhere, park it, then try to start it after sitting there for a few minutes, it wont start up.
It sounds like it's *just* about to start. The starter is turning it over, and it's trying to go, but it wont kick over, then sometimes it sounds like it's letting air flow back out of the air filter.
When the bike does this, I let it sit over night, and the next day it cranks up like a champ.
The first time this happened my mechanic friend told me it was loose battery terminals, so we tightended them, and it started right up (but it had sat for a few hours.) The next time it happend I checked the battery terminals, they were tight as can be, lots of fuel, the battery is making tons of volts, it's just some weird problem.
Does anyone have any experience with this?
Thank you
R N
I have an '03 fuel injected night train. I've been having an odd problem the last few times I've brought it out. I start it in the morning, ride it to work, park it for 10 hours, and it starts up fine. When I leave work and go somewhere, park it, then try to start it after sitting there for a few minutes, it wont start up.
It sounds like it's *just* about to start. The starter is turning it over, and it's trying to go, but it wont kick over, then sometimes it sounds like it's letting air flow back out of the air filter.
When the bike does this, I let it sit over night, and the next day it cranks up like a champ.
The first time this happened my mechanic friend told me it was loose battery terminals, so we tightended them, and it started right up (but it had sat for a few hours.) The next time it happend I checked the battery terminals, they were tight as can be, lots of fuel, the battery is making tons of volts, it's just some weird problem.
Does anyone have any experience with this?
Thank you
R N
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Joined: May 2008
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Hi 
It has a RSD air intake, and a V&H big radius exhaust.
Via searching here, it seems maybe the battery is just old enough to not be strong enough to crank up a warm engine (something about it takes more amps?). Also, another thing I read here is that perhaps the carb jets get stuck and it floods the engine when I stop.
Any other ideas?
Thanks guys
RN
It has a RSD air intake, and a V&H big radius exhaust.
Via searching here, it seems maybe the battery is just old enough to not be strong enough to crank up a warm engine (something about it takes more amps?). Also, another thing I read here is that perhaps the carb jets get stuck and it floods the engine when I stop.
Any other ideas?
Thanks guys
RN
Road Master
Joined: Aug 2008
Posts: 990
Likes: 3
From: lakeside ca.
well you said it was fuel injected so carb jets are out
sound like maybe it is loosing residual pressure and you are getting no gas
try turning the key on and off a few times then try to start it maybe you can get enough pressure up that way to start it used to work on the early fuel inj. cars. but then most of those had a cold start inj. don't know if harley has that type of system
sound like maybe it is loosing residual pressure and you are getting no gas
try turning the key on and off a few times then try to start it maybe you can get enough pressure up that way to start it used to work on the early fuel inj. cars. but then most of those had a cold start inj. don't know if harley has that type of system
Road Master
Joined: Nov 2007
Posts: 1,223
Likes: 3
From: Peoria, AZ
Load test the battery; 12VDC doesn't necessarily mean a good battery. The EFI/ignition needs at least 10.5 VDC to operate (if mem serves). Perhaps the battery is getting a slight "recharge" from sitting overnight but when you're running it keeps just enough voltage to run from the charging circuit until you stop and try to restart. Hard to arm chair QB this one but since you're friend was there and focused on the battery conns, I'd try this first. There are other connections besides at the battery to check, too. The injectors can't flood the intake because the fuel pump is what is pressurizing the system and the ECM controls the open/close rate. Everyone else's ideas are reasonable, too. No need to "key on, off" with HD's. Just turn the ignition on and wait for the bike to complete it's cycle (4-6 seconds until engine light goes out).
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Road Master
Joined: Apr 2008
Posts: 752
Likes: 0
From: North East, Florida
I vote on the battery too, make sure you have a good ground at the frame and get the battery load tested. These motors are air cooled and harder to start when they're hot.
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