1600 Nomad

curtis71 · 03-16-2014, 09:00 AM

Need some help have a 2007 Nomad with a few extra's Vance and Hines exhaust, K & N Filter, cobra fi 2000 tuner, purchased the tuner due to backfiring on trailing and it seems the tuner has helped a little i still have a lot of backfiring. Anyone have any suggestions?

**cnc** · 03-16-2014, 09:19 AM

Leaking exhaust gaskets?

redjay · 03-16-2014, 09:20 AM

PM sent

deacon1984 · 03-18-2014, 12:52 PM

I would second the leaking exhaust theory. I had terrible backfiring with my 2008 Nomad, and found that the screws that hold the back pipe onto the engine had come loose. Tightened them up, and backfiring was gone.

dshelly · 03-18-2014, 01:45 PM

If the backfiring is on decel then you need to add more fuel on the midrange portion of your tuner.

B-man308 · 03-18-2014, 05:42 PM

You need to "Marble" it, it's the smog junk. I had the same problem and this Gadget fix solved completely!

http://www.gadgetjq.com/smogstuffremove.htm

dshelly · 03-18-2014, 07:43 PM

If it's the emissions stuff, just take it off get a set of coasters and be done with it. Easy fix.

tonik · 03-18-2014, 07:58 PM

I had an 06. You are getting all the right answers, imho. You will have to work through them to figure it out.

1) I would check exhaust gaskets first since the exhaust was replaced. Fire it up cold and spray some Windex around the connections. You will see it real fast if it's leaking. And since you say it is backfiring a lot I think this is going to be it.

As mentioned add some to the mid-range of the tuner.

Marble it per the link above. Quick easy fix if it is the constant pop corn back fire you are talking about.

Vulcan Bill · 03-18-2014, 10:15 PM

^^^^^
What they said about marbleing the emissions. Theres a hose at the back of your OEM intake plate (right side) that directs air into the exhaust ports to ensure any unburned fuel is ignited. This causes a popping in the exhaust. The factory exhaust system is designed to muffle it but your aftermarket exhaust doesn't so you hear backfiring on deceleration. This is a common problem with these bikes. Marbleing just consists of detaching the hose and plugging it with something. A glass marble happens to be a perfect fit.
...but loose exhaust header bolts or bad exhaust gaskets will cause it too.

B-man308 · 03-22-2014, 06:18 PM

Curtis,
What did it end up being?

Vulcan Bill · 03-23-2014, 01:20 PM

Quote:

Originally Posted by B-man308

Curtis,
What did it end up being?

I haven't called them yet. Thanks for reminding.

03-16-2014, 09:00 AM	#1
curtis71 Jr. Member Join Date: Jun 2011 Location: Hueytown,Alabama Posts: 49	1600 Nomad Need some help have a 2007 Nomad with a few extra's Vance and Hines exhaust, K & N Filter, cobra fi 2000 tuner, purchased the tuner due to backfiring on trailing and it seems the tuner has helped a little i still have a lot of backfiring. Anyone have any suggestions? Login or Register to Remove Ads
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03-16-2014, 09:19 AM	#2
cnc Join Date: May 2009 Location: Montreal QC Posts: 12,034	Leaking exhaust gaskets? __________________ Norm Ward 2008 blue / silver nomad kawanow / VBA #01136
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03-18-2014, 12:52 PM	#4
deacon1984 Member Join Date: May 2011 Location: Newark, Delaware Posts: 133	I would second the leaking exhaust theory. I had terrible backfiring with my 2008 Nomad, and found that the screws that hold the back pipe onto the engine had come loose. Tightened them up, and backfiring was gone. __________________ John VBA #1753 2008 Nomad
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03-18-2014, 01:45 PM	#5
dshelly Sr. Member Join Date: Mar 2012 Location: Belgrade, MT Posts: 2,824	If the backfiring is on decel then you need to add more fuel on the midrange portion of your tuner. __________________ Dave "(dshelly)" Shellenberger 2014 Harley Ultra Classic 2007 1600 Nomad (Black) Shellenberger Machine Belgrade, MT Various Bagger Member (Harley Chapter) VBA # 2395 Login or Register to Remove Ads
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03-18-2014, 05:42 PM	#6
B-man308 Jr. Member Join Date: Nov 2013 Location: Wellington, CO Posts: 26	You need to "Marble" it, it's the smog junk. I had the same problem and this Gadget fix solved completely! http://www.gadgetjq.com/smogstuffremove.htm __________________ 2005 Blk/Silver Nomad VBA # 02558
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03-16-2014, 09:20 AM	#3
redjay Top Contributor Join Date: Feb 2008 Location: Ontario Posts: 6,930	PM sent
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03-18-2014, 07:43 PM	#7
dshelly Sr. Member Join Date: Mar 2012 Location: Belgrade, MT Posts: 2,824	If it's the emissions stuff, just take it off get a set of coasters and be done with it. Easy fix. __________________ Dave "(dshelly)" Shellenberger 2014 Harley Ultra Classic 2007 1600 Nomad (Black) Shellenberger Machine Belgrade, MT Various Bagger Member (Harley Chapter) VBA # 2395
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03-18-2014, 07:58 PM	#8
tonik Advanced Member Join Date: Dec 2009 Location: Cleveland Ohio Posts: 714	I had an 06. You are getting all the right answers, imho. You will have to work through them to figure it out. 1) I would check exhaust gaskets first since the exhaust was replaced. Fire it up cold and spray some Windex around the connections. You will see it real fast if it's leaking. And since you say it is backfiring a lot I think this is going to be it. As mentioned add some to the mid-range of the tuner. Marble it per the link above. Quick easy fix if it is the constant pop corn back fire you are talking about.
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03-18-2014, 10:15 PM	#9
Vulcan Bill Sr. Member Join Date: Jul 2013 Location: Mesa Az Posts: 1,400	^^^^^ What they said about marbleing the emissions. Theres a hose at the back of your OEM intake plate (right side) that directs air into the exhaust ports to ensure any unburned fuel is ignited. This causes a popping in the exhaust. The factory exhaust system is designed to muffle it but your aftermarket exhaust doesn't so you hear backfiring on deceleration. This is a common problem with these bikes. Marbleing just consists of detaching the hose and plugging it with something. A glass marble happens to be a perfect fit. ...but loose exhaust header bolts or bad exhaust gaskets will cause it too. __________________ ---------------------------------------------------------------------------------------------------------------------------------------------------------------- '05 1600CL. Originator 18" Harley wheel mod, Dobeck TFI, True Duals, Mutazu hardbags, Flanders handlebars n' a bunch more. *Sometimes I miss the good ol' days but most times I'm just glad I survived them*
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03-22-2014, 06:18 PM	#10
B-man308 Jr. Member Join Date: Nov 2013 Location: Wellington, CO Posts: 26	Curtis, What did it end up being? __________________ 2005 Blk/Silver Nomad VBA # 02558
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