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Ducati Monster Forum
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Intermittent Non starter
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Topic: Intermittent Non starter (Read 1667 times)
Motojim21
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Posts: 4
Intermittent Non starter
«
on:
October 01, 2023, 02:49:49 PM »
2004 620 owned since new, I think it has 48k on it now. Service is up to date.
Usually the bike fires up fine, but randomly it will just crank won't start up. When this happens I can roll it down a hill in my garage and pop the clutch and it always starts this way.
I'm really at a loss with it. It's completely random but only happens on cold starts. The bike still has the immobilizer but the light goes out like normal when this happens.
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stopintime
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S2R 800 '07
Re: Intermittent Non starter
«
Reply #1 on:
October 01, 2023, 03:37:45 PM »
Hello,
random happenings are the worst... hard to diagnose because we never know when next time is. Bad connectors somewhere (!) can affect almost every function on the bike - including starts. Battery might be bad and/or draw so much electricity that there's not enough left for normal ECU function (possible or likely?) Workshops/dealers can hook up their diagnostic tool to check all sensors and more. That might be a good start.
Have you done a search here? Find threads about "bad start" "can't start" "random issues" and that sort of topics. That can take some time, but is a great way to learn and to narrow down the number of suspects.
The good news is that since it only happens at cold starts, it probably is a somewhat limited number of issues to look for. Not EVERYTHING.
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237,000 km/sixteen years - loving it
Motojim21
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Re: Intermittent Non starter
«
Reply #2 on:
October 01, 2023, 03:41:49 PM »
Thanks for the reply. Yes I've searched but haven't found anything with the same issue.
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Howie
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Re: Intermittent Non starter
«
Reply #3 on:
October 02, 2023, 05:37:23 AM »
Start with fully charging your battery and getting it load tested. Stopintime is correct that a battery can be strong enough for the starter to turn but drop below the voltage needed for the computer to be happy. A shortcut would be if it starts with a jump.
Next step would be check the charging system and voltage drop in the starting circuit. Do you have a multi meter and some electrical knowledge?
«
Last Edit: October 02, 2023, 05:41:38 AM by Howie
»
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Motojim21
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Re: Intermittent Non starter
«
Reply #4 on:
October 02, 2023, 06:37:19 AM »
Yes I know my way around a multimeter. Charging system is good, I'll see what the battery voltage drop is when cranking.
Thanks!
Sent from my Pixel 6a using Tapatalk
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koko64
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Re: Intermittent Non starter
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Reply #5 on:
October 02, 2023, 05:03:37 PM »
Add a temp sensor to the check list.
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2015 Scrambler 800
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