Vapor Lock?

geputten · 12-08-2022, 05:50 PM

Hi all Vulcaneers,

Weird deal: Hot engine (here in FLA or any hard ride)... sometimes when I shut her down (2002/now 2005) Drifter, she just won't wanna start. Crank, crank, crank, etc. It was the same with the original 1500 engine, now STILL with the 1500 from a 2005 Classic FI.

Originally, I'd change into new plugs and the problem went away for a year or so.

(Original engine puked at about 70K, replaced engine, wiring harness, etc with a crashed '05 Classic with only 11K). Runs great, about 5K on her since the switcheroony.

Sigh. It started hard starting again. So, again as before, I changed out the plugs. Fires great as cold start, but....

It did it to me yesterday with the new plugs!

A friend suggested that it may be vapor lock? Anyone out there in virtual Vulkanland have similar issues?

I had a 2002 Nomad also that never did this, just my Drifter. Huh.

Thanks in advance. Ride safe.

redjay · 12-08-2022, 09:54 PM

Try running the bike with a quarter of tank with the gas cap off to rule out a vapor lock/vent line blockage ?

TX1700 · 12-09-2022, 02:38 PM

Dirty injectors will leak when you stop and the plugs will get saturated. Add about 2oz of an injector cleaner and it may clean them and stop the leak.

12-08-2022, 05:50 PM	#1
geputten Jr. Member Join Date: Feb 2013 Location: Tallahassee Posts: 9	Vapor Lock? Hi all Vulcaneers, Weird deal: Hot engine (here in FLA or any hard ride)... sometimes when I shut her down (2002/now 2005) Drifter, she just won't wanna start. Crank, crank, crank, etc. It was the same with the original 1500 engine, now STILL with the 1500 from a 2005 Classic FI. Originally, I'd change into new plugs and the problem went away for a year or so. (Original engine puked at about 70K, replaced engine, wiring harness, etc with a crashed '05 Classic with only 11K). Runs great, about 5K on her since the switcheroony. Sigh. It started hard starting again. So, again as before, I changed out the plugs. Fires great as cold start, but.... It did it to me yesterday with the new plugs! A friend suggested that it may be vapor lock? Anyone out there in virtual Vulkanland have similar issues? I had a 2002 Nomad also that never did this, just my Drifter. Huh. Thanks in advance. Ride safe. Login or Register to Remove Ads
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12-08-2022, 09:54 PM	#2
redjay Top Contributor Join Date: Feb 2008 Location: Ontario Posts: 6,932	Try running the bike with a quarter of tank with the gas cap off to rule out a vapor lock/vent line blockage ? Last edited by redjay; 12-09-2022 at 04:37 PM.
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12-09-2022, 02:38 PM	#3
TX1700 Member Join Date: Apr 2014 Location: Round Rock, TX Posts: 128	Dirty injectors will leak when you stop and the plugs will get saturated. Add about 2oz of an injector cleaner and it may clean them and stop the leak. __________________ TX1700 on VBA plunge on Texas VROC VROC #36447 VBA #02703 Ivan's reflash 2013 Vulcan Voyager ABS 2002 Road Star (sold)
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