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HD spark plugs no more

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226 views 8 replies 7 participants last post by  CarlosGGodfrog  
#1 ·
2020 softail, changed them in 22, then in 24. These are the plugs, one has failed. I replaced then with Drag Specialties ones.
Do you see anything wrong with them? I could not.
One has an internal break. After 85mpg it started to ping, knock, and loose power.
Replaced the plugs and no more problems.

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The replacements
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Anyone use these? how do they compare with HDs?
 

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#6 ·
PNW Slim said:
2020 softail, changed them in 22, then in 24.
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I wouldn't think that the plugs would need to be changed that often.
PNW Slim said:
Do you see anything wrong with them? I could not.
Click to expand...
The gap looks a bit large to me. Did you gap the plugs before putting them in?
PNW Slim said:
After 85mpg it started to ping, knock,
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Do you mean 85 mph or 85 miles? Before clicking the "Post reply" button, it would be a good idea to take a look at what you're about to post to eliminate obvious errors like the above.
Uncle Salty said:
85 MPG? Man, that thing is running awful lean.
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Uncle Salty said:
What test did you perform to determine that one has an internal break?
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A continuity check with a multimeter set on the ohm scale could be used, but the OP neglected to tell us this.
 
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