bikes not running right
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Outstanding HDF Member
Joined: Aug 2006
Posts: 2,248
Likes: 11
From: Queens,New York
bikes not running right
Was out in Myrtle Beach and noticed I was burning allot of fuel.So when i got home I checked out my power commander and realized I was running really rich.So I got pc on phone and the tech helped me re do a map.Went for a ride last week biked seemed to be running good.probally got about 32k per gallon.Today I took the bike out for a 250 mile ride and the bike is stummbling,puttering ,bogging ,and backfireing.sorry for the long post but I am very frustrated right now I also have auto tune in there.wtf could it be a bad oxygen sensor or something else.I am really not a wrench but trying anything i CAN NOT TO GO TO HARLEY.
Elite HDF Member
Joined: Jul 2010
Posts: 3,830
Likes: 302
From: Lorain Ohio
I'm not familiar with bike injection systems but with cars unmetered air getting in via a intake leak will cause the computer to max out the mixture so it won't damage anything by being too lean. with the bike running spray carb cleaner around the intake area an if the idle changes it's sucking it in thru a leak. A bad o2 sensor could cause the same thing.
Ultimate HDF Member
Joined: Feb 2008
Posts: 7,217
Likes: 3
From: Southern Ohio
About a week ago, my bike started running rough, missfiring on the rear cylinder.
Replaced the crank position sensor, no luck.
Finally unplugged the PCIII, and found that it had taken a dump on me. Can't complain, it ran fine for 6 years before it crapped out.
Went with an SE Pro Tuner installation and the bike runs like a bat out of hell.
Don't think I'd ever bother with a piggyback unit again.
Replaced the crank position sensor, no luck.
Finally unplugged the PCIII, and found that it had taken a dump on me. Can't complain, it ran fine for 6 years before it crapped out.
Went with an SE Pro Tuner installation and the bike runs like a bat out of hell.
Don't think I'd ever bother with a piggyback unit again.
Elite HDF Member
Joined: Jun 2008
Posts: 4,109
Likes: 9
From: Connecticut
I've seen a few of them go bad just like you decribe, like what was said unplug it and if it's fixed then you will know,
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Thread Starter
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Outstanding HDF Member
Joined: Aug 2006
Posts: 2,248
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From: Queens,New York
if it is bad what do you guys recommend going with.Same set up or somethig different.fuel pack ,race tuner etc.
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Club Member
Joined: May 2007
Posts: 145,895
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From: 40 miles Northeast of Indy..
Well Night Train said how I feel..
Lots of guys look for the cheapest way out using all diff kinds of tuners.
IMO there are several tuners out there now that are better ones but U'll have to spend some $$$.
I've had my SERT going on 6yrs this yr and its been Perfect..I don't like or want to have to keep messing with it.
I've had two dyno tunes, one when new when I didn stg1, and 2nd one when I did the cams which was FREE, it was all in the winter special deal with the cam install.
Other than that I haven't touched it.
I personally just don't want a piggy back tuner, IMO its just another area that can go wrong.
We each have our own likes and dislikes, For me if I bought another new bike, it'd have the SEPST and dynoed along with a stg`1 and cam job All done at same time, probably before I rode her home instead of at the 1K.
.
Lots of guys look for the cheapest way out using all diff kinds of tuners.
IMO there are several tuners out there now that are better ones but U'll have to spend some $$$.
I've had my SERT going on 6yrs this yr and its been Perfect..I don't like or want to have to keep messing with it.
I've had two dyno tunes, one when new when I didn stg1, and 2nd one when I did the cams which was FREE, it was all in the winter special deal with the cam install.
Other than that I haven't touched it.
I personally just don't want a piggy back tuner, IMO its just another area that can go wrong.
We each have our own likes and dislikes, For me if I bought another new bike, it'd have the SEPST and dynoed along with a stg`1 and cam job All done at same time, probably before I rode her home instead of at the 1K.
.
Cruiser
Joined: Jan 2011
Posts: 214
Likes: 0
From: kentucky
The power commander are pretty bad for a dump after 2 or 3 years. There are several good tuners out there. Some of the more popular ones are : TTS mastertune, Daytona twintech, Power vision, and the sepst. I also suspect your tuner has crapped out. I personally use the sepst with a good dyno tune.