2006 Heritage Classic Fuel consumption problem
Stellar HDF Member
Joined: Feb 2010
Posts: 3,395
Likes: 266
From: Southern California
Sounds like a bad Map or maybe a leaking Fuel Injector. Have you taken a look at your spark plugs? With the kind of MPG you're reporting they should be showing a fairly rich condition. On my signature bike with a stage 1 setup I was getting 45 MPG. With the 103, Cams, TTS reprogram, etc I now get 40 MPG but is does make the scenery move with considerably more authority now.
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Cruiser
Joined: Oct 2010
Posts: 165
Likes: 0
Sounds like a bad Map or maybe a leaking Fuel Injector. Have you taken a look at your spark plugs? With the kind of MPG you're reporting they should be showing a fairly rich condition. On my signature bike with a stage 1 setup I was getting 45 MPG. With the 103, Cams, TTS reprogram, etc I now get 40 MPG but is does make the scenery move with considerably more authority now.
Road Warrior
Joined: Jun 2010
Posts: 1,337
Likes: 4
From: Sunny South Florida
The dealer can't "Dyno" a download, you would need to purchase a SERT in order for them to do that.
The download will get your mileage back but at a cost of performance and heat. The download is designed to run lean to satisfy EPA specs. I had SE exhaust and AC on my 04 with a dealer download and it ran so lean that my pipes blued. Not just the head pipes but the Muffler. Way too lean for my taste. I have since gotten the T-max with AT and no more heat issues but I do get between 35 and 40MPG now. I'm sure if I spend a bit more time with the tune I get get that to a consistent 40 but that takes time that I have not had to spend with it.
The download will get your mileage back but at a cost of performance and heat. The download is designed to run lean to satisfy EPA specs. I had SE exhaust and AC on my 04 with a dealer download and it ran so lean that my pipes blued. Not just the head pipes but the Muffler. Way too lean for my taste. I have since gotten the T-max with AT and no more heat issues but I do get between 35 and 40MPG now. I'm sure if I spend a bit more time with the tune I get get that to a consistent 40 but that takes time that I have not had to spend with it.
Road Master
Joined: Feb 2011
Posts: 818
Likes: 0
From: Battle Creek, MI
My 04 Heritage with SE stage I gets about 38 mpg all around riding. (I keep track) I figure (dont know for sure because I bought it this way) that I must have some download as stock I am told will get 42-44 all around. I get to about 160 miles and start to look for a fuel up, but can go another 15-20 miles if I ride easy.
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Cruiser
Joined: Oct 2010
Posts: 165
Likes: 0
Just got back from the dealer. Thay did a Stage 1 download (34363-06/DT) 1450 ST1 Softail 25 Deg. Not sure why they used that download instead of the 34362-06?
Bike still pops on decel. I tightened the nuts on both front/rear exhaust headers. Won't know if mileage improved until I refill it....
Bike still pops on decel. I tightened the nuts on both front/rear exhaust headers. Won't know if mileage improved until I refill it....
Club Member
Joined: May 2007
Posts: 145,895
Likes: 821
From: 40 miles Northeast of Indy..
IMO its the PC.. or the way its map...
Son and I have had 4 new bikes, 3Softails and 1 Streetglide since 07 and they all have gotten between 40-46 mpg, average of 42-43..
Makes no difference if ridden in town, putting in 3rd-4th in the country or out on state roads at 60-65.
All four of them have had Cams and SERT installed and were dyno tuned..
Actually they do better after 5k and the cams will/should get U 1-3 mpg better if tuned correct.
Son and I have had 4 new bikes, 3Softails and 1 Streetglide since 07 and they all have gotten between 40-46 mpg, average of 42-43..
Makes no difference if ridden in town, putting in 3rd-4th in the country or out on state roads at 60-65.
All four of them have had Cams and SERT installed and were dyno tuned..
Actually they do better after 5k and the cams will/should get U 1-3 mpg better if tuned correct.
Stellar HDF Member
Joined: Mar 2006
Posts: 2,395
Likes: 153
From: Utah
Sigh... there are a number of threads on this forum that will explain this, plus everyone's opinion, good or bad, about what the issues are.
You saved about $600 by not getting an autotune replacement ECM. Even then, for performance (which SE stage 1 is intended for, not for looks and sound... that's a side benefit) you will not get gas mileage and you won't be in compliance with EPA standards.
You save about $300 by using a canned map that is always on the safe (and thus rich) side because how can the manufacturer guess what your bike is doing and where it is (elevation, humidity, temperature, etc.). You can instead get a dyno that costs about $300 more and get the best >compromise< between mileage and performance. If you don't have autotune (no closed loop O2 sensors), that is good for where you are but not the best for other climates and locations. If you make any other performance changes, you will need to get re-dyno'd.
A Harley download will not be what controls you bike (as someone was insisting in this thread) when you have a Power Commander. The power commander intecepts and replaces the AFR settings of your Harley ECM.
C#
You saved about $600 by not getting an autotune replacement ECM. Even then, for performance (which SE stage 1 is intended for, not for looks and sound... that's a side benefit) you will not get gas mileage and you won't be in compliance with EPA standards.
You save about $300 by using a canned map that is always on the safe (and thus rich) side because how can the manufacturer guess what your bike is doing and where it is (elevation, humidity, temperature, etc.). You can instead get a dyno that costs about $300 more and get the best >compromise< between mileage and performance. If you don't have autotune (no closed loop O2 sensors), that is good for where you are but not the best for other climates and locations. If you make any other performance changes, you will need to get re-dyno'd.
A Harley download will not be what controls you bike (as someone was insisting in this thread) when you have a Power Commander. The power commander intecepts and replaces the AFR settings of your Harley ECM.
C#
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Cruiser
Joined: Oct 2010
Posts: 165
Likes: 0
With the PCIII disconnected, I have noticed that I seem to be getting more mileage out of a tankfull. Right now, the needle is sitting between empty and half, and I have went 130 miles....usually at this point, my low fuel light is coming on. Either I had a bad canned map or the PCIII is not playing well with the ECU. There is still quite a bit of popping on decel even with the ST1 dowload. The folks from Dynajet sent me a new map to try. For now, I'm going to monitor my mileage w/o using the PCIII, and at some point hook it up and try the newer maps. Will keep ya'll posted on my progress...and thank you all for your opinions and suggestions.
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Road Warrior
Joined: Jun 2010
Posts: 1,337
Likes: 4
From: Sunny South Florida
The download won't do much for decel pop. Mine sounded like the fourth of July with the download.
you will get better mileage but that is because you are running lean. You run more of a risk of damage from heat that way, but it is more economical.
There is a fine line between lean and too lean that is why most aftermarket tuners will lean toward a fat mix to ensure that they don't damage anything but mileage.
Before you try that map, I would contact them again and ensure that it will work as expected with the HD download already installed.
you will get better mileage but that is because you are running lean. You run more of a risk of damage from heat that way, but it is more economical.
There is a fine line between lean and too lean that is why most aftermarket tuners will lean toward a fat mix to ensure that they don't damage anything but mileage.
Before you try that map, I would contact them again and ensure that it will work as expected with the HD download already installed.
Road Master
Joined: Aug 2010
Posts: 1,067
Likes: 2
From: New Hampshire
I agree with fcsallan the Stage 1 download did nothing to address my popper.
A proper map, either tuned or download, will fix the deceleration pop. They do this by making the first few hundred rpms (throttle closed position) richer. On a typical Power Commander III a 7 to 10 percent drop in fuel mileage is not unusual, but add that to the better overall throttle response and the riders new found enthusiasm you might just be looking at 20 to 25 percent drop from stock.
I am curious to see how your testing goes with the stock ECU vs Current PC vs Newer Mapped PC.
A proper map, either tuned or download, will fix the deceleration pop. They do this by making the first few hundred rpms (throttle closed position) richer. On a typical Power Commander III a 7 to 10 percent drop in fuel mileage is not unusual, but add that to the better overall throttle response and the riders new found enthusiasm you might just be looking at 20 to 25 percent drop from stock.
I am curious to see how your testing goes with the stock ECU vs Current PC vs Newer Mapped PC.
Last edited by TheTroupe; Jun 8, 2011 at 12:25 PM.