PC III issue - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 6 Old 07-19-2010, 10:28 AM Thread Starter
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PC III issue

Installed a Dyno-Jet PC III USB to cure some rough running after a slip-on install and it had been running very well.
This past friday I rode the bike to a rally, got in around 8:00 pm, checked into hotel and went to dinner. During dinner the "bottom fell out" of the sky. Torrential rain and mega lightning.
The next morning, suns out and things are drying off, I stepped out to join in a ride and when I started the bike it sounded not quite right. Just took a second to realize that it was not running on both cylinders.
I checked all the obvious connections etc., pulled off the seat and the main unit was dry.
Ended up trailering the bike back home and haven't had a chance to trouble shoot any further as yet. My first step will be to disconnect the power to unit and the plugs to the injectors and reconnect them as stock and see it the bike runs on both again.
Is it possible that static discharge from near lightning could have caused the unit to malfunction? Other ideas?
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post #2 of 6 Old 07-19-2010, 10:46 AM
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As you dont state the year or if this is Wee or Vee, if it is the front cylinder, check for the small spark plug well drain being blocked (Wee only as far as I know). If I am not mistaken, the newer 2-plug heads don't use the drain hole.

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post #3 of 6 Old 07-19-2010, 12:35 PM
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I had exactly the same problem the day after fitting my PC111, the only thing I had done was to wash the bike after the install. I unclipped the new injector wiring couplings to find some water had managed to seep in. After drying them out I just smeared some silicone grease in the gaps between the connector halves to keep the water out and hey presto back to normal again.
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post #4 of 6 Old 07-19-2010, 01:15 PM Thread Starter
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Quote:
Originally Posted by rcacs View Post
As you dont state the year or if this is Wee or Vee, if it is the front cylinder, check for the small spark plug well drain being blocked (Wee only as far as I know). If I am not mistaken, the newer 2-plug heads don't use the drain hole.

Cheers

ps: a good time to put your yr/model in your sig line.
It is an 07 1000, It is the front and where might the drain hole be located if applicable?

Quote:
Originally Posted by Beerbelly View Post
I had exactly the same problem the day after fitting my PC111, the only thing I had done was to wash the bike after the install. I unclipped the new injector wiring couplings to find some water had managed to seep in. After drying them out I just smeared some silicone grease in the gaps between the connector halves to keep the water out and hey presto back to normal again.
I'll dry them out this evening and check.

Thanks guys.
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post #5 of 6 Old 07-20-2010, 08:30 AM Thread Starter
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Checked the drain hole, cleared mud daubers clog and some small amount of water came out. Made no difference.

Un-plugged PCIII and re-plugged stock FI connections. Made no difference.

Removed lower radiator screws for access and removed front spark plug, barely snug, to see if fouled. It looked good, dry but cleaned it anyway. Attached it to plug lead, held it against head and started bike, plug sparked as it should so I replaced it.
Made no difference.

Exhausted the simple checks that I can easily do so next step is cart it to the dealer.
The realy disappointing thing about this is that with all the HD's and cruisers that sat out in the rain that night on either side of me. All started and rode away that morning and left me sitting there with an "Adventure Touring" bike that's only running on one.
At least my V-Rod still runs.
Let you know what I discover.

'07, DL 1000, gift to self
'04 Anodized "B" model V-Rod, 50th B-day gift from Darling Wife. http://www.mem.com/Story.aspx?ID=2528706
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post #6 of 6 Old 07-21-2010, 08:55 AM Thread Starter
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Went home for lunch yesterday intending to load the bike on trailer and take to shop and just for giggles I turned it on a hit the starter button.
Lo and behold it ran for about two seconds on two then sputtered and only ran on one again.
Thet led me to believe I might have a fouled plug due to trying to run it on one. So on the return trip to the office I stopped at the local dealer and bought some spark plugs, installed the front one when I got home last evening and it lit off like nothing was ever wrong. I did make sure that I used my air line and blow any residual moisture out of the spark plug cap first.
Went ahead and swapped out the rear plug while I was at it and glad I did. As I mentioned in earlier post the front plug was barely finger snug, the rear was the same.
I haven't had the bike that long and it wasn't due for a service interval yet, ran OK so I never thought of checking the spark plugs for proper torque. They're a pain to get to anyway. Just goes to show you that you never make assumptions on anyone else's work.

In the end I can only assume that from the torrential downpour the front plug cavity filled with water and made a short path from the plug cap to ground. Though I removed the cavity drain hole stopage the cap internals were still wet or the plug was truely fouled.

Appreciate the valuable suggestions. Those, some experimentation and deductive reasoning got things sorted out.

'07, DL 1000, gift to self
'04 Anodized "B" model V-Rod, 50th B-day gift from Darling Wife. http://www.mem.com/Story.aspx?ID=2528706
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