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post #1 of 10 (permalink) Old 06-20-2011, 07:23 PM Thread Starter
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backfire then engine dies (almost)

Has anyone ever experienced this and it was NOT attributable to a loose map sensor hose? I was on a downhill returning home from a 2-3 hour ride and i'm going about 50 with very little throttle because of the downhill and i hear a back fire and the engine is no longer responding to throttle. I pull over and the engine is still running but barely and i hear another couple backfires as it's struggling to idle. So i shut the engine off and hit the restart button and all is back to normal and i ride home with not further issues, no engine light, nothing. Any ideas?
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post #2 of 10 (permalink) Old 06-21-2011, 12:37 AM
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Gremlins?

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post #3 of 10 (permalink) Old 06-21-2011, 11:13 AM Thread Starter
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Actually, yeah, probably. Or in other words a fluke maybe....a bit of water or dirt in the fuel or some such thing. I suppose it's possible. In 15000 miles this is the first hiccup of any kind.
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post #4 of 10 (permalink) Old 06-22-2011, 01:29 AM
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Thats strange Daz. the onlythought that comes to mind is that it adapted to a lean situation.
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post #5 of 10 (permalink) Old 06-22-2011, 01:57 AM Thread Starter
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Could be....i had just come down from the top of the local mountain range rather quickly. The last several miles are particularly steep. I don't know that the bike adapts that fast tho. But it does make me wonder now that you mention it.
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post #6 of 10 (permalink) Old 06-22-2011, 02:04 AM
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Quote:
Originally Posted by dazco View Post
Could be....i had just come down from the top of the local mountain range rather quickly. The last several miles are particularly steep. I don't know that the bike adapts that fast tho. But it does make me wonder now that you mention it.
If it was Big Bear, there should be no problem. I've done it four times and all I suffered was blown fork seals the first time I rode it.

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post #7 of 10 (permalink) Old 06-22-2011, 02:57 AM Thread Starter
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If it was Big Bear, there should be no problem. I've done it four times and all I suffered was blown fork seals the first time I rode it.
No, but you're right...big bear or any mountain like that should be no problem normally. Just wondering if it could have adapted differently than normal. A fluke if you will.
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post #8 of 10 (permalink) Old 06-22-2011, 08:35 AM
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It actually sounds as if one of your injectors stuck open. More of an electrical glitch than a mechanical. Once you shut it down and re-fired the motor everything reset.

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post #9 of 10 (permalink) Old 06-22-2011, 11:41 PM
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If you were running the original 203 stock tune than I'd say everythings normal
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post #10 of 10 (permalink) Old 07-04-2011, 04:29 PM
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I had a similar situation when my bike only had a few hundred miles on her...it kept repeating itself, especially when coming to a stop...like at a red-light. A friend of mine recently had similar problems with his bike too, and found out that he had water in the line. A bottle of HEAT fixed the problem entirely.

Same exact thing occurred to my son's Speedmaster...

Probably not the same issue, but thought I'd share a similar problem.
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