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NGK D8EA Sparkplug Ohm Specifications?

  • Thread starter Thread starter c&c
  • Start date Start date
C

c&c

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Hi me again the guy with a billion questions!

Long story short, mi bike fires erratically across full rev range.

I'm now at testing my spark plugs. I need to know the ohm specifications for the D8EA.
I know they are non-resistance plugs. Logically the resistance should be very low

The 4 plugs below are 3yrs old.
#1 = 28.2 ohm
#2 = No reading
#3 = 5000 ohm
#4 = No reading
And one the PO had 50000ohm

This could be the reason why bike runes like an 80yr old chain smoker in a sprint that is if an 80yrs old chain smoker would still be alive :)

I took the readings 5 times because they where so off from one another.
 
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For the low cost involved, why not just get four new plugs, measure them to satisfy your curiosity, install them and call the job "done"? :-k


And, NO, Jeepster, he is not talking about the caps, he specifically mentioned testing the PLUGS.

.
 
Yeah, for $2.19 each at most auto parts stores (ask for NGK number 2120 -- they won't have any idea what D8EA means), I'm not even going to waste five minutes farting around with old plugs.
 
I ordered them through my local parts shop. Will be picking them up tomorrow morning. I'll report back.
 
Got the new ones and tested at 0 (Zero) ohm!

Going to put them in, go for a ride and have a big grin on my face when I twist the throttle :)

I'm positive my spark plus went bad because I decided to Sonic clean them last year and they had time to rust oxidize corrode during winter.....
That's what happens when your a complete noob to mechanics. Live and learn :)

I bought 5 new sparkplugs. 4 of them are at 0ohm and one is at 1 ohm.
I'll be sending a email to NGK asking what they consider to be within specs and report back.
 
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That's pretty strange. Spark plugs can get worn at the electrode after a LOT of miles but almost never go bad unless corroded, which must be what happened to yours. Clean out your plug caps as well.

I would not bother NGK over 1 ohm. That's probably about the resistance of the meter leads and/or meter itself. Will not affect ignition even in the slightest. Put the new plugs in and go.
 
My leads are .2ohm and when tested 4 units read .2ohm so basically 0ohm and the one at 1.2ohm.
Ill still ask what the specs / tolerances are out of curiosity.
 
Does she ever. I feel like this when I twist throttle :devilish:.

I'll be starting another thread because there are still some small issues.
 
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