Could this be a Power Commander problem?
Thread Starter
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Road Captain
Joined: Jul 2007
Posts: 675
Likes: 0
From: Central NJ near the Seashore
This sounds like what might be going on with mine. I may be just shifting cleaner because I am thinking about it. Thanks for the 411 on the firmware. I didn't have any problems installing 1.4, do you think I need to load the 1.3.9 version?
I didn't mean to bash the PCV. It has worked flawlessly other than this. I have about 17,000 miles on mine now and I have only seen this happen a few times. Usually when I am riding really agressively and shifting fast and hard, perhaps a little sloppy. Thats why what Jamie posted makes sense to me. I am riding to work tomorrow and will try that to see if it happens. I appreciate the fact the Jamie always has a timely response and is not defensive just factual. He responded to my email the same day when I asked my question. I have been EXTREMELY happy with my power package. I posted not because I see this as a real problem for me just that I had loaded the updated firmware and thought it had helped. I thought that might help someone else.
Now I am wondering if my testing after the install was flawed so I will check it out as soon as I can.
I didn't mean to bash the PCV. It has worked flawlessly other than this. I have about 17,000 miles on mine now and I have only seen this happen a few times. Usually when I am riding really agressively and shifting fast and hard, perhaps a little sloppy. Thats why what Jamie posted makes sense to me. I am riding to work tomorrow and will try that to see if it happens. I appreciate the fact the Jamie always has a timely response and is not defensive just factual. He responded to my email the same day when I asked my question. I have been EXTREMELY happy with my power package. I posted not because I see this as a real problem for me just that I had loaded the updated firmware and thought it had helped. I thought that might help someone else.
Now I am wondering if my testing after the install was flawed so I will check it out as soon as I can.
Tourer
Joined: Jan 2008
Posts: 356
Likes: 1
From: Port Ludlow, Wa.
Jamie is in testing with my unit now. As I said earlier, my miss is at low rpm at low throttle like yours. He did try a different map first, richening up the low range, but no luck yet. Jamie has always been great to deal with, so I'm sure he'll solve it.
Road Master
Joined: Dec 2008
Posts: 832
Likes: 1
From: Bagram, Afghanistan
Just for another line of thought on this....
Have you guys that are experiencing "miss" problems swapped out your spark plugs? I tried the old SE plugs and my bike hated them. It would occasionally miss with those. I went to Autolites and it did the same thing. I went back to a new set of the stock plugs and haven't had the problem again.
Just for the record I know how to gap plugs, and they were all set correctly.
May not be your issue, but you may want to rule it out, as well as checking resistance in the plug wires per the service manual.
Have you guys that are experiencing "miss" problems swapped out your spark plugs? I tried the old SE plugs and my bike hated them. It would occasionally miss with those. I went to Autolites and it did the same thing. I went back to a new set of the stock plugs and haven't had the problem again.
Just for the record I know how to gap plugs, and they were all set correctly.
May not be your issue, but you may want to rule it out, as well as checking resistance in the plug wires per the service manual.
Tourer
Joined: Jan 2008
Posts: 356
Likes: 1
From: Port Ludlow, Wa.
Just for another line of thought on this....
Have you guys that are experiencing "miss" problems swapped out your spark plugs? I tried the old SE plugs and my bike hated them. It would occasionally miss with those. I went to Autolites and it did the same thing. I went back to a new set of the stock plugs and haven't had the problem again.
Just for the record I know how to gap plugs, and they were all set correctly.
May not be your issue, but you may want to rule it out, as well as checking resistance in the plug wires per the service manual.
Have you guys that are experiencing "miss" problems swapped out your spark plugs? I tried the old SE plugs and my bike hated them. It would occasionally miss with those. I went to Autolites and it did the same thing. I went back to a new set of the stock plugs and haven't had the problem again.
Just for the record I know how to gap plugs, and they were all set correctly.
May not be your issue, but you may want to rule it out, as well as checking resistance in the plug wires per the service manual.
Advanced
Joined: Aug 2009
Posts: 59
Likes: 1
From: Rapid City, SD
I'll have to keep an eye on mine as I haven't noticed any problems w/ my PCV or autotune modules. Bike did run a little rough after I did heads and TW7's but the autotune has really improved the performance (and it keeps getting better).
You guys are fortunate to have FuelMoto behind you.
You guys are fortunate to have FuelMoto behind you.
Road Master
Joined: Apr 2008
Posts: 1,012
Likes: 285
From: Alva Florida
2010 SEUC 110, Rinehart true duals, Stage 1 A/C. Had the same problem but......it was a SERT. Dynoed at the dealer, new bike. 2000-2400 cruising along, it would cough, or spit back through the throttle body. Sevice tech, said they could not tune at less than 15% throttle, and it needed more fuel at that rpm range. They took off the SERT and installed a PCV and the bike runs great. No more problems. Go figure. They used a Bub 7 download, or so it says on the top of the dyno sheet.
6th Gear
Joined: Aug 2007
Posts: 12
Likes: 0
My 2 Cents Worth
Installed the PCV without auto tune in Dec 09. Bike is a 09 ultra the A/C and Slipons otherwise stock. After about 10k miles started to notice the hesitation or hickup with some detination at partial throttle settings. Talked to Keith at Fuelmoto and installed a richer map and upgraded firmware. Still have the momentary hickup, but otherwise running great. March of this year installed a 103 Stage II kit with Woods TW6-6 cam. Fuel map from Fuelmoto. Bike runs better than expected, power, throttle response, ect. BUT still has the momentary hickup when in the crusing range. Annoying but is not a ride stopper. Hope there is a fix and my experience helps.
Road Master
Joined: Dec 2007
Posts: 885
Likes: 14
From: SoCal
Mine did this also
Mine did this sometime back. I went to the Power Commander site and downloaded an update and installed the update to my PC. It cured the issue for me!
What are the symptoms of a power commander problem? (This is a brand new unit). I just had my bike done, picked it up yesterday, and it runs great with PCV, new pipes, big sucker and cam, but there is an intermittent misfire. It may occurr 4-5 times per hour, bike does not stall, just looses power for a split second. It's enough to cut off the cruise control. It has only done this when crusing, not during startup or accellerating so far. No hard starting--starts right up and pulls great. The bike runs fantastic otherwise. I called the mechanic yesterday after the first ride. The mechanic said that he thinks there is a possiblity of bad gas that he's never had this problem and it did not do it on his test ride. He said that he had to take the bike to a local station where they were out of premium fuel, so he filled with low test and added an octane booster. He asked me to fill the bike with High octane Sonoco and see if the problem goes away as he feels we must rule out bad gas. I did so this AM and although it did it several times, it seemed to be much less frequent than yesterday. Any thoughts out there?
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Road Master
Joined: Dec 2008
Posts: 832
Likes: 1
From: Bagram, Afghanistan
Have any of you (TBW bikes) experiencing what you call power commander issues checked your ECM codes?
I had a much more severe occurrence today, but similar initially to what the OP posted. Turns out my TBW throttle position sensor and jumper harness crapped out.
Check out that thread here: https://www.hdforums.com/forum/touri...e-my-rant.html
Not saying this is your problem...but it could be getting ready to go.
I had a much more severe occurrence today, but similar initially to what the OP posted. Turns out my TBW throttle position sensor and jumper harness crapped out.
Check out that thread here: https://www.hdforums.com/forum/touri...e-my-rant.html
Not saying this is your problem...but it could be getting ready to go.
Thread Starter
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Road Captain
Joined: Jul 2007
Posts: 675
Likes: 0
From: Central NJ near the Seashore
What are the symptoms of a power commander problem? (This is a brand new unit). I just had my bike done, picked it up yesterday, and it runs great with PCV, new pipes, big sucker and cam, but there is an intermittent misfire. It may occurr 4-5 times per hour, bike does not stall, just looses power for a split second. It's enough to cut off the cruise control. It has only done this when crusing, not during startup or accellerating so far. No hard starting--starts right up and pulls great. The bike runs fantastic otherwise. I called the mechanic yesterday after the first ride. The mechanic said that he thinks there is a possiblity of bad gas that he's never had this problem and it did not do it on his test ride. He said that he had to take the bike to a local station where they were out of premium fuel, so he filled with low test and added an octane booster. He asked me to fill the bike with High octane Sonoco and see if the problem goes away as he feels we must rule out bad gas. I did so this AM and although it did it several times, it seemed to be much less frequent than yesterday. Any thoughts out there?
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The other issue, which adds insult to injury, with that Ultra, is my gas gauge is very inaccurate. The first 60 miles on the trip the needle drops to the 1/2 mark, then drops quickly to the 1/4 mark and stays there awhile. A PIA! I'm wondering if HD would consider fixing this as a warrantee item?
Last edited by dlrshort; Apr 3, 2010 at 04:28 PM.