Poor Fuel Mileage

chopped · 11-03-2014, 10:54 AM

So I have posted on here before about this. I am getting around 25MPG as of right now. here is what I have done and what not:

2002 VN1500L FI

1 3/4" exhaust straight back with 8" baffles
Hyper Charger removed and new filter with backing plate to reduce air flow in (was sucking way to much air)
Evap System removed
New TFI fuel controller
New Fuel pump
New fuel regulator
New Fuel return valve.
throttle cables adjusted properly
No vacuum leaks on the intake

I have to have the idle adjustment screw turned all the way in just for it to idle. Any ideas? I am at the point where I will scrap the bike cause I am done messing with it.

cactusjack · 11-03-2014, 12:13 PM

Have you thoroughly cleaned/scrubbed the throttle body? Gunk builds up in the bores and on the butterfly plates and can severely lower idle speed to where you need to adjust the idle knob to get it to run right.

nomad ryder · 11-03-2014, 12:50 PM

+1 on cleaning the throttle bodies- I did mine this weekend and could not believe how much crud was in there. I also looked at the right side spark plug tube; sure enough, the cam chain is just beginning to scrape across it. I've ordered extenders from Chuckster.

trosco · 11-04-2014, 01:36 PM

My guess is that you are running way way rich. Bet your plugs a black and sooty and the insides of your pipes are pure black. You need a new ECM. They fail and take the bike way rich. I have seen nomad pump so much fuel that they foul the oil.

**MAS Tequila** · 11-04-2014, 03:02 PM

I go along with Ross, you're likely running way to rich.

Try turning the pots down or even disconnecting the fuel module, and see if it changes.

Is that 25mpg around town? That isn't terrible if you do a lot of local riding and are a little heavy with the right wrist.

MT

11-03-2014, 10:54 AM	#1
chopped Member Join Date: May 2011 Location: Stafford, VA Posts: 171	Poor Fuel Mileage So I have posted on here before about this. I am getting around 25MPG as of right now. here is what I have done and what not: 2002 VN1500L FI 1 3/4" exhaust straight back with 8" baffles Hyper Charger removed and new filter with backing plate to reduce air flow in (was sucking way to much air) Evap System removed New TFI fuel controller New Fuel pump New fuel regulator New Fuel return valve. throttle cables adjusted properly No vacuum leaks on the intake I have to have the idle adjustment screw turned all the way in just for it to idle. Any ideas? I am at the point where I will scrap the bike cause I am done messing with it. __________________ 2002 Nomad FI - Custom Air Intake - Baffleless Pipes - TFI - Frustration! 200Fun Suzuki "Big Single" Chopper - Rigid - Springer front end - Suicide shifter - Straight pipe - Gas and Go! "Work hard... Ride hard... Die hard...." -Me! Login or Register to Remove Ads
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11-03-2014, 12:13 PM	#2
cactusjack Mega-Contributor Join Date: Sep 2007 Location: Where it doesn't snow...ever! Posts: 21,926	Have you thoroughly cleaned/scrubbed the throttle body? Gunk builds up in the bores and on the butterfly plates and can severely lower idle speed to where you need to adjust the idle knob to get it to run right. __________________ Scott "Cactusjack" Hanks VBA #00105 H.O.G. #4250060 2011 H-D Ultra Limited 103ci :: 2011 HD Electra Glide Ultra Limited w/Stage 1 :: Rallies: Mesquite '08\|Custer '09\|Cortez '10\|Crescent City '11\|Kanab '12\|Antlers '12\|Estes Park '13\|Antlers '13\|Orofino '14\|The Dalles '17
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11-04-2014, 01:36 PM	#4
trosco Sr. Member Join Date: Feb 2008 Location: Charlotte, NC Posts: 1,464	My guess is that you are running way way rich. Bet your plugs a black and sooty and the insides of your pipes are pure black. You need a new ECM. They fail and take the bike way rich. I have seen nomad pump so much fuel that they foul the oil. __________________ trosco: just call me Ross 2007 Black & Titanium Nomad (Nomad made 65K but got replaced 2014) 2010 Titanium Goldwing 2014 KLR 650 New Edition
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11-04-2014, 03:02 PM	#5
MAS Tequila Join Date: Jan 2009 Location: Psychiatric Ward FL Posts: 3,429	I go along with Ross, you're likely running way to rich. Try turning the pots down or even disconnecting the fuel module, and see if it changes. Is that 25mpg around town? That isn't terrible if you do a lot of local riding and are a little heavy with the right wrist. MT __________________ MT 2016 FLHP Psychiatric Ward FL VBA 936 Login or Register to Remove Ads
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11-03-2014, 12:50 PM	#3
nomad ryder Member Join Date: Nov 2013 Location: Orange County, CA Posts: 274	+1 on cleaning the throttle bodies- I did mine this weekend and could not believe how much crud was in there. I also looked at the right side spark plug tube; sure enough, the cam chain is just beginning to scrape across it. I've ordered extenders from Chuckster.
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