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  Sed8td

  2 years ago

  I'm new to Harleys and are after some advice.

  I have a 2011 Softail standard which I put extended forward controls on, so I removed the exhaust, I put back on, all together and it ended up leaking at the engine so I purchased new gaskets and it seems to have fixed the issue.

  But now it has no power until you give it a lot of throttle and it takes off. 

  Then let off and backfires and no power again.

  Rear cylinder was 110 degrees and front was 78.

  I pulled spark plugs and both very black. They were only 500ks old, NGK dcpr7e.

  It has 259e cams, big radius pipes and SE intake.

  Also running a Vance and Hines tuner.

  Any help would be appreciated.

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  Wideglider

  2 years ago

  Not familiar with that model, but during mods any sensors disturbed?

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  Sed8td

  2 years ago

  Only the 2 oxygen sensors, and ABS module.

  No codes show up on the V&H fp3 code reader, not sure how good they are at getting codes. 

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  Wideglider

  2 years ago

  Are the oxygen sensors/wiring damaged, or not connected back properly?

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  Sed8td

  2 years ago

  Definitely connected properly, and cannot see any damages to wires, they all seem secure

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  Sed8td

  2 years ago

  Installed new plugs, and seems to have fixed problem. 

  
  

  Wideglider likes this post

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  tussuck

  2 years ago

  You could try a hotter version of that plug range if the issue returns.  DCPR7E with the hotter being DCPR6E

  Sed8td likes this post

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  leachy

  2 years ago

  Quoting tussuck on 01 Dec 2021 07:02 AM

  You could try a hotter version of that plug range if the issue returns.  DCPR7E with the hotter being DCPR6E

  Sorry for the ignorance but that does allow the actual spark plug to run hotter and therefor burn the extra fuel??

  
  

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  petebob

  2 years ago

  Im pretty sure 259e cams need at least 10.5:1 compression. Theyre used in the stage 3 and 4 kits.

  If youre running stock compression, they aint gunna work.

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  Sed8td

  2 years ago

  Yeah, I'm not 100% sure on rest of motor, was done before I purchased it. 

  He said it had that cam, springs to match. 

  I was thinking of going for a more of a torque cam anyway. 

  
  

  
  

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  Sed8td

  2 years ago

  Issue has come back, it was running fine, then gave it a good squirt and it's fouled the plugs again. 

  Things I've remembered are I put a small amount of injector cleaner in tank. 

  Would that be causing my issue?

  Also would running one range hotter spark plug help?

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  tussuck

  2 years ago

  Its running Rich if its fouling the plugs so look to the Tuner first.  Are all the O2 Sensors connected correctly and are they the same type as the original - ie wideband/narrowband/3 wire/5wire.

  
  

  Also is it throwing up any error codes?

  Again if you can plug into the tuner it should also be able to tell you.

  
  

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  Sed8td

  2 years ago

  No codes coming up on tuner, I cleaned plugs again, disconnected the O2 sensors and cleaned contacts and reinstalled. 

  It fixed it, but I didn't get to full operating temp or get to give it a lot of throttle as a big storm came through. 

  
  

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  Retroman

  2 years ago

  Where in Australia are you ?

  
  

  I would try disconnecting the FP3 tuner entirely and reconnect the O2 sensors.

  
  

  The bike will revert to OEM "stage nothing" stock ECM tune. It should run and not foul plugs tho'.

  
  

  It will run hot so best not run for long but it's not gunna hurt to ride it around a 10Km run or whatever.

  
  

  I used to see this all the time with original Power Commanders after a few years. (Bad for electrical contact corrosion)

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  Sed8td

  2 years ago

  I'm in South East Melbourne.

  I'll give the unplugging the tuner a go as well. 

  👍

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  Sed8td

  2 years ago

  I've put it into autotune and seems to run better. 

  I remembered it started fouling plugs with the canned map. 

  Although autotune is slow and drinks the fuel I'll give it ago

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  paulybronco

  2 years ago

  Quoting Sed8td on 03 Dec 2021 04:37 AM

  I've put it into autotune and seems to run better. 

  I remembered it started fouling plugs with the canned map. 

  Although autotune is slow and drinks the fuel I'll give it ago

  Not sure why auto tune is heavy on fuel....autotune generally trims fuel AFR towards the leaner side. 

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  Sed8td

  2 years ago

  That is what I read and thought. 

  Although I was told to change the fuel target from 14.6 to 14.4. 

  And o2 from 0.5 to 0.8

  And lower temp to start autotune to 175

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  paulybronco

  2 years ago

  Quoting Sed8td on 05 Dec 2021 04:23 AM

  That is what I read and thought. 

  Although I was told to change the fuel target from 14.6 to 14.4. 

  And o2 from 0.5 to 0.8

  And lower temp to start autotune to 175

  So does that tuner have a facility to do a basic autotune? No predetermined settings etc....

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  Sed8td

  2 years ago

  I'm not 💯 sure, I only changed some parameters that Vance and Hines told me due to it not tuning properly. 

  So I guess you can change things and run your own tune