My VFCIV/AFR troubles - Victory Forums - Victory Motorcycle Forum
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 4 (permalink) Old 09-26-2014, 12:15 PM Thread Starter
CrossRoads's Avatar
Join Date: Sep 2010
Location: OC, CA
Posts: 5,947
Default My VFCIV/AFR troubles

So I've had the VFCIV on my bike for a few months now. Something strange happens approximately one in 200 rides (I know, crazy stat, but I've been keeping track of it). So, everything runs fine most of the time, but once in a while, I start the bike, get on it, and it's acting like the fuel controller is on drugs. AFR gauge starts reading super rich mixture, and drops all the way to 10, and power cuts out and comes back on, and it feels like it's running richer than a fat pig before Christmas. Under deceleration, the AFR starts to read normal mixture again, but as soon as I apply some throttle, it acts up again. I did pull over, checked intake to make sure nothing's blocking it, and got back on. The problem does not go away with shutting off and restarting the bike. The problem does not go away with blipping the throttle, going into WOT acceleration, or anything else I tried. However, the problem is gone the next day when I hop on it, and it doesn't come on for about a month or so, which is about 200 rides for me.

It's happened on warm days, of mid 80's to 90's ambient temp, although that's the normal weather I have been riding in almost everyday (except early mornings when I ride in 60-70 degree ambient). It has nothing to do with fuel, because the problem goes away the next time I ride it, without adding or removing fuel.

Issue never came on during a ride, and it never went away during a ride. It's there from the first moment I start the bike, and stays there until next time I ride it (which leads me to think it's all the fuel controller's fault). And, like I said, it does not occur again for about a month or 200-ish rides.

I'm out of ideas, so I am open to hear yours, or if anybody has had a similar problem with the AFR+/VFCIV.

Please add your bike's year and model to your signature. Here's why.
Riding: 2011 Cross Roads & 2016 Springfield
Blest with victory and peace, may the heav'n rescued land
Praise the Power that hath made and preserved us a nation.
Then conquer we must, when our cause it is just,
And this be our motto: "In God is our trust."
And the star-spangled banner in triumph shall wave
O'er the land of the free and the home of the brave!
CrossRoads is offline  
Sponsored Links
post #2 of 4 (permalink) Old 09-26-2014, 03:06 PM
Senior Member
rewindguy's Avatar
Join Date: Jan 2014
Location: Calgary, Alberta, Canada
Posts: 304

Not sure if it is same - but my Dobeck Gen 4 with gauge and Wide band O2 sensor did something like that one time. And I think I caused it?? I got on bike and started it before the the gauge set it self and then turned it off. I got a phone call and I think I toggled the key on and off rapidly! The thing ran like crap - seemed over rich and wasn't happy! I ended up just turning bike off - then turning key on ( not starting) and resetting the set points. Has not acted up since. Now when I go to bike, I turn key on, wait for the process to cycle, then hit starter, wait till the gauge sets itself and reads AFM and then I can go.
I think part of the problem is with the unit getting it's power from the damn injectors - Vic's seem to have a weird way of powering them up - when you decal they turn off ( note that;s when gauge needle swings all the way to the right) and when you turn bike off the gauge flutters and then turns off with the injectors!
Maybe I am wrong but that's what I think is happening.

2014 Cross Country Tour
Goldrush / Black
rewindguy is offline  
post #3 of 4 (permalink) Old 09-26-2014, 05:42 PM
Premium Member
dtmmil's Avatar
Join Date: Jul 2012
Location: Hawley MN
Posts: 4,178

i do believe the gen 4 and vfc 4 are basically the same, the vfc4 supposedly has been tweaked by lloyd

currently bikeless

2012 Cross Country(Imp blue)
de-badged,(self tinted) Klockwerx flare, passenger backrest, passenger touring floorboards, VictoryHID kit, Miller Mufflers short baffles,Lloyds air filter(from witchdr.)Lloyds timing wheel(6*), adjustable drop link, cut seat, removed cats, PCV w/at.
1978(2009) Honda cb750 chopper
Hawley MN(sold)
dtmmil is offline  
Sponsored Links
post #4 of 4 (permalink) Old 09-27-2014, 11:47 AM
Join Date: Mar 2014
Location: Southern NH
Posts: 43

I just went through hell with my PC V and in the end it was a bad ground. I t was fine then just went to crap then fine again then go to crap was hard to find the issue.

2016 Cross Country
Lloyds air filter, PCV,
12 inch Apes, 1/4 turn throttle
Magna flow mod, Timing wheel this winter,
Rockford amp and 6.5 speaker upgrade
KPR108 is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Victory Forums - Victory Motorcycle Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome