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2007, ecm, troubleshooting

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  #1  
Old 28th February 2015
Mightywarrior72 Mightywarrior72 is offline
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Default 2007 sporty above 70mph

My wife rides 2007 sporty 883 (ECM model). Recently at speeds above 70mph she tells me that she lacks the power that she typically has. At 70 seems like max throttle is required. Nothing much above that. The symptoms seem to be periodic. On a couple of rides she has reported the issue, then a bit later symptoms are gone. It starts fine, idles nicely, sounds normal.


Where should my troubleshooting begin?
Intake leak? Should I check plugs for lean or rich condition? If so what do I look for on plugs? Should I check if plug wires are shorting to ground? If so what is the best way to check? Do the ECM bikes have vacuum lines? Could this be clogged fuel injectors? If so what should I run to help clean them out? She has only ridden a few times since the summer. Maybe a dozen times in 6 months. Could the injectors be clogging up with old gas?

Any help would be appreciated.
Thanks in advance.
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  #2  
Old 28th February 2015
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If compression checks good and spark is bright, I'd start with fuel flow
When is the last time that the two relays were replaced?
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Old 28th February 2015
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Check for any stored codes.
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  #4  
Old 28th February 2015
Mightywarrior72 Mightywarrior72 is offline
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Default

Quote:
Originally Posted by sportsterdoc View Post
If compression checks good and spark is bright, I'd start with fuel flow
When is the last time that the two relays were replaced?
I don't own a compression gauge, but with the help of some good brothers on this forum, we replaced both jugs last summer with some donated ones with about 30k on them. I will assume that they are good.

I replaced the two relays about two months ago. I had starter issues and I replaced the relays and put in new battery. One of those two solved the starting issue.

Regarding fuel flow, would it help to run sea-foam, fuel injector cleaner or something else through the injectors?

The times that she has reported the issue, it was cold outside and we were at the beginning of the ride. After warm up it seemed to get better. Does that help any with diagnosis?
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Old 28th February 2015
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Default

I run enough WOT to not have fuel injector issues, so I cannot advise on FI cleaner
Does Wedge have a compression tester?
Mine's at my eldest son-in-laws in GA, where I am visiting. I could bring it home, but do not know when I will next go to SoCal.

Rethinking and with the added info posted, I'd go through electrical connections and check for codes as STS suggested
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Old 28th February 2015
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Also check to make sure that the throttle/return cables are adjusted correctly and are not binding. The throttle plate should open all of the way at full throttle
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Old 28th February 2015
Mightywarrior72 Mightywarrior72 is offline
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Default

Quote:
Originally Posted by Sweet Terry Smoove View Post
Check for any stored codes.
I checked;
P or the ECM None
S Turn signal None
SP Speedo None
T Tach No response (I don't have a tach)

I think this would indicate no ECM issues? What is it really checking for on the ECM code check? What can I rule out or in based on no error codes.

Thanks
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Old 28th February 2015
Mightywarrior72 Mightywarrior72 is offline
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Quote:
Originally Posted by Sweet Terry Smoove View Post
Also check to make sure that the throttle/return cables are adjusted correctly and are not binding. The throttle plate should open all of the way at full throttle
Great Idea. I will check right now.
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Old 28th February 2015
Mightywarrior72 Mightywarrior72 is offline
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There seems to be a lot of slop on the cables at the throttle. The cables wiggle around quite a bit. Should I adjust the tension with the (Turnbuckles) where the cable attaches to the throttle at the handgrip? If so how tight should the cables be?
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Old 28th February 2015
Mightywarrior72 Mightywarrior72 is offline
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This is a F.I. bike. I don't know how to check for the throttle plate opening???
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