Trying to troubleshoot cold start issue - Kawasaki Vulcan Forum : Vulcan Forums
 
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post #1 of 8 (permalink) Old 05-26-2019, 09:20 AM Thread Starter
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Trying to troubleshoot cold start issue

Since taking my 06 900 classic out of winter storage I've been having an issue starting the bike. I had it apart to do a valve adjustment, fi2000 power pro, opened up in intake a little, and a new lithium ion battery, all new fluids. When I try to start the bike it turns over and fires up for a second and then dies every time unless I blip the throttle. Once I blip the throttle it runs fine and idles at the correct rpm. I have the service manual and I can't seem to find anything relating to this. Is there a cold idle adjustment that is different from the main idle screw/cable adjustment to the right of the intake? Any ideas?

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2006 Vulcan 900 Classic
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post #2 of 8 (permalink) Old 05-26-2019, 09:33 AM Thread Starter
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I should add that once the bike is running there are literally zero issues with it (cruising around, idling, wot)

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post #3 of 8 (permalink) Old 05-26-2019, 10:05 AM
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My bike will sometimes do this when the outside air temp is low (low 40s or lower). Like yours, once I blip the throttle, all is well.
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post #4 of 8 (permalink) Old 05-26-2019, 10:35 AM Thread Starter
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Mine does it no matter what the ambient temperature is, yesterday was 74 for example

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post #5 of 8 (permalink) Old 05-26-2019, 04:41 PM
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Since you recently got the bike out of winter storage, did you put a fuel stabilizer in the fuel tank before you stored it? Have you filled it with fresh fuel since you got it out of storage? The ECU has the ability to adjust away from "standard" conditions, if this is warranted. My guess would be because of the fuel, your bike won't run the standard mapping, so after blipping the throttle, the ECU starts adjusting for poor fuel quality.

Last edited by jbiggers; 05-26-2019 at 04:49 PM.
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post #6 of 8 (permalink) Old 05-26-2019, 06:06 PM Thread Starter
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I left about 3L in the gas tank over winter with fuel stabilizer it in and then filled it with a jerry can filled with fresh gas in the spring for the first start. I'm thinking the issue is coming from the throttle, either the cables, butterfly's, or something like that but I'm not all that familiar with troubleshooting.
I did a 200km cruise yesterday and the bike performed perfectly. Literally zero performance issues aside from the starting issue

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post #7 of 8 (permalink) Old 05-27-2019, 08:35 PM
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I can't think of anything else to add, except it might help to finish running that tank of gas thru to close to empty. Then fill it again and see how it goes.
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post #8 of 8 (permalink) Old 05-27-2019, 09:51 PM
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Quick fix. Clean the throttle body, and butterfly's, use carb spray cleaner and a old tooth brush. Do it every time you take it out of storage.
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