Color of Exhaust Residue

**biscuitsngravy** · 03-20-2008, 03:46 AM

I did a search about this subject, but didn't find anything that related. Didn't find anything on Google either!

Back in the old days (and that is a long time ago) my Dad advised me that if an auto exhaust had more of a medium brown color inside the pipe, the carb was set about right. If the exhaust was black inside the pipe, the carb was running too rich. If it was sooty black, there was a real problem.

Since most of our vehicles have fuel injection now, including later model Nomads, I wonder if that still holds true.

What color do you think the pipes of a properly tuned Nomad should be?

thanks for your help,
BnG

01nomad · 03-20-2008, 03:57 AM

I'll agree with your dad. Mine exhaust ran black until I turned the TPS down to about 4.40V DC and now they are brown. It was set at 4.52 from the factory

03-20-2008, 07:41 AM

How did you do that?

blowndodge · 03-20-2008, 10:11 AM

I've never head of a FI Nomad's TPS that high before (4.52). Mine was 4.40 and now it's 4.43. It doesn't die at idle on occasion like it used to anymore.

**Top Cat** · 03-20-2008, 10:52 AM

Quote:

How did you do that?

Yes, How ???

**ringadingh** · 03-20-2008, 10:57 AM

Mine seems to be running a sooty black as well, maybe I should check the TPS? Is checking it a big deal?;D

joesnomad · 03-20-2008, 05:30 PM

Mine seems to be running a sooty black as well, maybe I should check the TPS? Is checking it a big deal?;D

Here is a link that may help you http://www.gadgetjq.com/tps_adjust.htm

**biscuitsngravy** · 03-20-2008, 10:32 PM

I appreciate your comments. My bike's pipes are black for sure but the engine doesn't ping either. It is a 2006/1600. After reading the Gadget article, I think it would be a good idea to take some readings and maybe be able to tweak it even better.

Thanks again for your comments and direction. That's why I like this forum! BnG

**ringadingh** · 03-20-2008, 11:02 PM

I'll give that a try within the next few days, weather permitting. Hopefully that will cure the running rich condition. My bike doesn't ping, I just hope it doesn't start pinging after I check it. Thanks for the info.

03-20-2008, 03:46 AM	#1
biscuitsngravy Join Date: Nov 2007 Location: Gowrie, IA Posts: 803	Color of Exhaust Residue I did a search about this subject, but didn't find anything that related. Didn't find anything on Google either! Back in the old days (and that is a long time ago) my Dad advised me that if an auto exhaust had more of a medium brown color inside the pipe, the carb was set about right. If the exhaust was black inside the pipe, the carb was running too rich. If it was sooty black, there was a real problem. Since most of our vehicles have fuel injection now, including later model Nomads, I wonder if that still holds true. What color do you think the pipes of a properly tuned Nomad should be? thanks for your help, BnG __________________ Dave Mills AKA BiscuitsNGravy 2006 Vulcan Nomad "BiscuitsNGravy" Kawanow #150 Vietnam @ Jan67-Jan68 Retired USAF Patriot Guard Riders/American Legion #431 Login or Register to Remove Ads
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03-20-2008, 03:57 AM	#2
01nomad Member Join Date: Dec 2007 Location: Clinton, Iowa Posts: 192	Color of Exhaust Residue I'll agree with your dad. Mine exhaust ran black until I turned the TPS down to about 4.40V DC and now they are brown. It was set at 4.52 from the factory
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03-20-2008, 07:41 AM	#3
Guest Posts: n/a	Color of Exhaust Residue How did you do that?
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03-20-2008, 10:11 AM	#4
blowndodge Sr. Contributor Join Date: Jul 2007 Location: Washington City, Utah Posts: 16,474	Color of Exhaust Residue I've never head of a FI Nomad's TPS that high before (4.52). Mine was 4.40 and now it's 4.43. It doesn't die at idle on occasion like it used to anymore. __________________ I love my Victory Cross Country Tour 106. Smells like Victory! Ultra's are Limited There are two types of Harley riders. Those that trailer them and those that push them. The most Interesting Man in the World "Find the things in life you don't do well and don't do those things" Member # 0005
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03-20-2008, 10:57 AM	#6
ringadingh Join Date: Aug 2007 Location: Newmarket Ontario Canada Posts: 35,387	Color of Exhaust Residue Mine seems to be running a sooty black as well, maybe I should check the TPS? Is checking it a big deal?;D __________________ 2002 Nomad aka Bountyhunter VBA #27 VROC #18951
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03-20-2008, 05:30 PM	#7
joesnomad Member Join Date: Sep 2007 Location: Orrstown Pa. Posts: 134	Color of Exhaust Residue Mine seems to be running a sooty black as well, maybe I should check the TPS? Is checking it a big deal?;D Here is a link that may help you http://www.gadgetjq.com/tps_adjust.htm
	0

03-20-2008, 10:32 PM	#8
biscuitsngravy Join Date: Nov 2007 Location: Gowrie, IA Posts: 803	Color of Exhaust Residue I appreciate your comments. My bike's pipes are black for sure but the engine doesn't ping either. It is a 2006/1600. After reading the Gadget article, I think it would be a good idea to take some readings and maybe be able to tweak it even better. Thanks again for your comments and direction. That's why I like this forum! BnG __________________ Dave Mills AKA BiscuitsNGravy 2006 Vulcan Nomad "BiscuitsNGravy" Kawanow #150 Vietnam @ Jan67-Jan68 Retired USAF Patriot Guard Riders/American Legion #431
	0

03-20-2008, 11:02 PM	#9
ringadingh Join Date: Aug 2007 Location: Newmarket Ontario Canada Posts: 35,387	Color of Exhaust Residue I'll give that a try within the next few days, weather permitting. Hopefully that will cure the running rich condition. My bike doesn't ping, I just hope it doesn't start pinging after I check it. Thanks for the info. __________________ 2002 Nomad aka Bountyhunter VBA #27 VROC #18951
	0

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