EVAP Canister Delete
Grand HDF Member
Joined: Nov 2009
Posts: 4,315
Likes: 1,663
From: Tampa
Yup, all are pre-wired, CA bikes get the canister, purge solenoid, and lose the resistor. The purge solenoid redirects tank vapors into your carb when a vacuum is present. You also need to remember to plug wherever that hole is.
The ECM doesn't measure tank pressure, it measures the solenoid feed and if it's open it triggers the CEL. I went with around 1000 ohms since that's what heard the OEM resistor was valued at (and later confirmed when I actually bought one).
The ECM doesn't measure tank pressure, it measures the solenoid feed and if it's open it triggers the CEL. I went with around 1000 ohms since that's what heard the OEM resistor was valued at (and later confirmed when I actually bought one).
Stellar HDF Member
Joined: Mar 2011
Posts: 3,482
Likes: 631
From: NorCal Rocklin
So are you trying to save weight or using the extra space for anything special? Removing the CA emissions stuff isn't going to add any hp and maybe take 1lb off on that bike that weighs over 500lbs. So you will not feel any different removing it, but if you just want to do it just for the sake of it then go for it.
But you did give me an idea for me to remove mine so Im going to hijack your thread and report back in a few days.
But you did give me an idea for me to remove mine so Im going to hijack your thread and report back in a few days.
Extreme HDF Member
Joined: Aug 2013
Posts: 16,271
Likes: 15,108
From: Somewhere SW
Looked at the wiring diagram for '15, only has a evap solenoid. I can't tell what ecu is reading, amp draw of solenoid, or resistance of it. Based on Mattbastards post, must be reading ohms. If you remove canister, and solenoid, install the resistor. On my 09 roadglide, It doesn't show at all, and I just left it. Doesn't hurt anything unless is visibly objective. According to schematic, there is no pressure sensor for tank pressure, which is monitored on autos
This tells the ecm that the evap is working.
what a person can do is unplug the evap hose, cap the intake port and ride the bike. If the CEL comes on then we know the ecm monitors evap performance
if monitoring the presence of the purge value is of concern the ecm looks for the coil resistance, if the value is outside what the ecm expects it should throw a CEL.
just my $00.02
Last edited by JustDave13; Apr 30, 2018 at 08:44 PM.
Thread Starter
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Cruiser
Joined: Apr 2018
Posts: 197
Likes: 23
From: Chicago
Looked at the wiring diagram for '15, only has a evap solenoid. I can't tell what ecu is reading, amp draw of solenoid, or resistance of it. Based on Mattbastards post, must be reading ohms. If you remove canister, and solenoid, install the resistor. On my 09 roadglide, It doesn't show at all, and I just left it. Doesn't hurt anything unless is visibly objective. According to schematic, there is no pressure sensor for tank pressure, which is monitored on autos
Thanks a lot. Great info. The solenoid is tucked away, so not visibly offensive. I think Ill remove the canister as well as the lines running to it and leave the solenoid plugged in and in place.
Thread Starter
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Cruiser
Joined: Apr 2018
Posts: 197
Likes: 23
From: Chicago
So are you trying to save weight or using the extra space for anything special? Removing the CA emissions stuff isn't going to add any hp and maybe take 1lb off on that bike that weighs over 500lbs. So you will not feel any different removing it, but if you just want to do it just for the sake of it then go for it.
But you did give me an idea for me to remove mine so Im going to hijack your thread and report back in a few days.
But you did give me an idea for me to remove mine so Im going to hijack your thread and report back in a few days.
visually you cant even see it and performance wise there is zero gains to be had.
Thread Starter
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Cruiser
Joined: Apr 2018
Posts: 197
Likes: 23
From: Chicago
Well on automobiles the ecu also checks for a change in intake manifold pressure, I'm not sure on these bikes but with some cars the ecu looks for the purge valve, commands it open and then checks for the MAP sensor value change.
This tells the ecm that the evap is working.
what a person can do is unplug the evap hose, cap the intake port and ride the bike. If the CEL comes on then we know the ecm monitors evap performance
if monitoring the presence of the purge value is of concern the ecm looks for the coil resistance, if the value is outside what the ecm expects it should throw a CEL.
just my $00.02
This tells the ecm that the evap is working.
what a person can do is unplug the evap hose, cap the intake port and ride the bike. If the CEL comes on then we know the ecm monitors evap performance
if monitoring the presence of the purge value is of concern the ecm looks for the coil resistance, if the value is outside what the ecm expects it should throw a CEL.
just my $00.02
If the bike was running I would definitely unplug it and see what happened but I didn5 realize there was a canister bolted to the backside of the cover until I had the entire primary removed. The bikes crippled until I decide to either eliminate it and go with the chrome inner or reinstall the OE granite primary.
Thread Starter
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Cruiser
Joined: Apr 2018
Posts: 197
Likes: 23
From: Chicago
So are you trying to save weight or using the extra space for anything special? Removing the CA emissions stuff isn't going to add any hp and maybe take 1lb off on that bike that weighs over 500lbs. So you will not feel any different removing it, but if you just want to do it just for the sake of it then go for it.
But you did give me an idea for me to remove mine so Im going to hijack your thread and report back in a few days.
But you did give me an idea for me to remove mine so Im going to hijack your thread and report back in a few days.
I take it yours is mounted to the down tubes and not buried behind the primary. That would be a hell of a lot of work just to remove the canister LOL
Stellar HDF Member
Joined: Mar 2011
Posts: 3,482
Likes: 631
From: NorCal Rocklin
http://partsfinder.onlinemicrofiche....(CALIF.%20ONLY)
If you think it's worth the time go for it.
Last edited by vizcarmb; Apr 30, 2018 at 09:49 PM.
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Road Warrior
Joined: Nov 2016
Posts: 1,434
Likes: 619
From: IE, CA
Remove it all...... Leave the purge solenoid connected to the ecm otherwise youll get a check engine light. Done to both of mine. I run a thundermax tuner on them and removed the solenoid also..... But stock, youll need to leave the solenoid connected.... Otherwise the ecm has no idea you pulled everything else off.
Seasoned HDF Member
Joined: Jan 2015
Posts: 16,013
Likes: 7,137
From: Sandy Eggo's North County
With respect to emissions equipment, I can't see a huge difference whether it's a Softie, or Dyna, or bagger. They all share the same engine, pretty much.
Pulling the canister, won't that leave some vacuum lines open? Or, do you connect them to the A/C backing plate?
What is the purpose on removing the canister?
Unsightly? I get that.
Performance increase? Hmmm...
Will it "breathe" gas fumes via the tank vent?
Pulling the canister, won't that leave some vacuum lines open? Or, do you connect them to the A/C backing plate?
What is the purpose on removing the canister?
Unsightly? I get that.
Performance increase? Hmmm...
Will it "breathe" gas fumes via the tank vent?