Go Back   Harley Davidson Forums > Harley Davidson Tech & Mechanical Forum > Ignition/Tuner/ECM/Fuel Injection
Sign in using an external account
Register Forgot Password?
Search


Ignition/Tuner/ECM/Fuel Injection Need advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.
Sponsored by: Cardo Systems

Reply
 
 
 
P
 
Thread Tools Search this Thread
  #1  
Old 10-24-2009, 10:08 PM
09Sftail 09Sftail is offline
Hang Around
Join Date: Sep 2009
Posts: 3
Default Black Smoke from exhaust on cold start

I have a '09 Softail Custom with Screaming Eagle slip-ons and stage 1 air cleaner kit I installed. I took it to the HD dealer where I purchased the bike and had them do the HD Stage 1 download. Ever since when I start the bike up for the first time of the day, or after it sits for several hours (enough for the engine to get cold) it blows black smoke out the exhaust. If you crack the throttle and raise the RPM's it really pushes out the black smoke. After a few minutes it seems to quit and I don't see the black smoke any more.

I don't know alot about EFI systems on bikes but I have been an auto tech for the last 25 years, and this doesn not seem like it is right or good for the bike.

Anyone have any experience with a situation like this or maybe can tell me if it will have an adverse affect on the bike.

Thanks
Reply With Quote
  #2  
Old 10-25-2009, 12:23 AM
genedjr's Avatar
genedjr genedjr is offline
Road Captain
Join Date: Jul 2007
Location: Colorado Springs
Posts: 632
genedjr@gmail.com
Default

In the olden days, black smoke was valves, blue smoke was rings.

If we follow this your valve seals are leaking a bit and need to be replaced.
...gene
__________________
2003 Road King Classic
SE Air, Slip-ons, ME880
Andrews EZ Pushrods
Thundermax w/Autotune
Max Power 71.22, Max Torque 80.54 @6000ft elevation (pre-TMax)
Reply With Quote
  #3  
Old 10-25-2009, 07:37 AM
prodrag1320's Avatar
prodrag1320 prodrag1320 is offline
Road Warrior
Join Date: Sep 2009
Location: deland,florida
Posts: 1,736
Default

Quote:
Originally Posted by genedjr View Post
In the olden days, black smoke was valves, blue smoke was rings.

If we follow this your valve seals are leaking a bit and need to be replaced.
...gene
???? black smoke is fuel,blue smoke is oil.your just a little rich on cold start,if you had a powercommander (or any other tunable system),you could lean it out a bit,but if it stops in a couple minutes when bike warms alittle,i wouldnt sweat it
kirby
vee twin racing
Reply With Quote
  #4  
Old 10-25-2009, 08:36 PM
09Sftail 09Sftail is offline
Hang Around
Join Date: Sep 2009
Posts: 3
Default

Kirby

Thanks for the advice. And as far as black smoke being fuel related you are absolutely correct. Too much fuel going into the cylinders ends up going out the exhaust as black smoke. I'll keep an eye on it and make sure it doesn't get worse. I don't have any way of monitoring what the EFI system is doing unlike I am able to do with cars, so you can see why I'm asking.

Thanks again for you quick reply
John
Reply With Quote
  #5  
Old 10-25-2009, 09:15 PM
Razerman Razerman is offline
Prospect
Join Date: Nov 2006
Location: Montana
Posts: 164
Default

Smell your oil on the dip stick to see if any fuel is washed past your rings and into the oil.
just a thought.
R.
__________________
Reply With Quote
  #6  
Old 10-26-2009, 01:37 PM
ColdCase's Avatar
ColdCase ColdCase is offline
Road Warrior
Join Date: Apr 2009
Posts: 1,360
Default

Doesn't sound normal to me.

How has your fuel mileage been? The EFI has richer cold start AFR settings, but a stage 1 download shouldn't affect it much. Does the bike start with less smoke after an overnight or few days rest? If so, maybe an injector is leaking and then the excess fuel dries out overnight.

Otherwise it could be any number of "hard starting" associated problems.
Reply With Quote
  #7  
Old 10-26-2009, 04:25 PM
BVBOB's Avatar
BVBOB BVBOB is offline
Road Captain
Join Date: Mar 2006
Location: West Central WI
Posts: 649
Default

It is merely the warmup enrichment function of your ecm, which I believe lasts 90 seconds, the amount of fuel added is an afr multiplier table and controled by engine temp, an easily adjusted table with SERT/TTS type tuners. Likely those tables are not exactly correct for your application, really nothing to worry about.
__________________
07 Ultra classic
06 Street Bob
Reply With Quote
Old 10-26-2009, 04:25 PM
 
 
 
P
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
High oil pressure after stage 1 a/c install OsoFat General Harley Davidson Chat 2 03-23-2014 05:47 PM
High oil pressure after Stage 1 A/C install OsoFat Oil and Oil Related Topics 0 03-23-2014 02:55 PM
79 Ironhead, smoke after sitting TS Penn Exhaust System Topics 3 01-25-2013 04:52 PM
White smoke on start up Tc 88 snstiggy General Harley Davidson Chat 10 09-11-2012 06:34 AM
Motor smokes....how to fix???? 99FLSTCDAVE Evo Classic Models 8 03-18-2012 08:41 AM


Tags
black, car, cold, davidson, engine, evo, exhaust, fuel, harley, injection, motorcycle, smoke, smoking, start, starting


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join HDForums

Advertising
Featured Sponsors
Vendor Directory
Sponsors

All times are GMT -5. The time now is 04:31 AM.


Internet Brands, Inc.