Fuel Fouled Plugs

[idoneguzted]

Hi all, i've got an 18 rough v7iii i've only put 30 miles on myself that I picked up from my local dealer. Finally nice enough and time enough to ride last weekend but she wouldn't fire. Pulled the plugs, and they look and smell like their fuel-fouled. The bike was a demo bike with 300 miles on it and an Agostini scrambler exhaust on it. Specifically, the AMV7IIISCRI, but pretty identical to the AMV7SCRCICL-EARLY you can see here: https://www.af1racing.com/store/Scripts/prodView.asp?idproduct=74024

I've probably put only 30 miles on it myself. Didn't think much of it at the time, but sales guy said he thought it ran better with DB killer out, but since i was mostly scooting around town at the time getting familiar with bike and didn't want to piss off my neighbors too much, i put it in. It did seem to have more trouble idling, but not too much...until i couldn't get it to start.

I'm wondering what i should do here. Should i just clean or replace the plugs and run without db killer and see how it does? Or should i see about remapping the ECU to a leaner config?

[nc43bsa]

Check out the "Runs Rich" thread and see if anything there applies to your situation.

https://wildguzzi.com/forum/index.php?topic=105661.0

[idoneguzted]

Check out the "Runs Rich" thread and see if anything there applies to your situation.

https://wildguzzi.com/forum/index.php?topic=105661.0

Yeah, I meant this post this sooner, but i was just looking at that thread. Seems like taking a look through GuzziDiag is one of my next steps. Just waiting on the cables to arrive for that.

[sib]

Every time you remove or install the DB killers, it's good practice to reset the ECU trims.  This can be done with GizziDiag, but a simpler way is to just disconnect the battery, let it sit for a while, and then reconnect the battery.

[KiwiKev]

Take it back to the dealer and let him sort it out ,?

[guzzisteve]

Make sure your system is made for 2 O2 sensors as the V7 3 has 2 of them, may be the problem if shop don't know what they are doing.

[malik]

It's only anecdotal, but back when the V7C was only new (similar bike, but different) I went for an early morning ride, brewed up a coffee at a lookout, then the bike would not start/fire. Ended up ringing the dealer, who asked "your last refill wasn't Shell 98, was it?". (Shell 98 is here a premium fuel with additives for modern car motors that apparently created problems with the unsophisticated V7 engine). Resting it for another half hour enabled it to start. Never used that particular fuel again.

Have a mate who recently had problems getting either of his bikes to start. Months of work on them, including 3 sessions of ultrasonic carb cleaning, couldn't fix the problem. Similar symptoms to yours - fuel flooding the system. It turns out that it was contaminated fuel. He was in the practice of buying fuel by the 20 litres & decanting this into the bikes. He thought he was rigorous in his fuel handling, but apparently not rigorous enough.

Perhaps, in your case, the bike was topped up with fuel the shop had lying around. Likely not uncommon in the trade. I would try emptying the tank & trying fresh fuel. See if that makes any difference.

[idoneguzted]

Every time you remove or install the DB killers, it's good practice to reset the ECU trims.  This can be done with GizziDiag, but a simpler way is to just disconnect the battery, let it sit for a while, and then reconnect the battery.

Much appreciated info. Yesterday, i disconnected battery and put some new plugs in. Started right up. Run it for 20 miles at mostly highway speeds, and it did run much better. Still going to look at the mapping as soon as i can. thanks!