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Proper Spark Plug Gap?

spark plugs

Best Answer j1980mac , 30 April 2017 - 02:36 PM

Hey guys, I haven't got a tune yet, but plan to soon. Speaking of the hesitation/misfire, I'm definitely sure that I've experienced this.  

 

The .028 gapped NGK-6510 are the plugs I went with.

 

Got them at Unleashed: http://www.unleashed...-gapped-to-028/

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5 replies to this topic

#1 OFFLINE   j1980mac

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Posted 29 April 2017 - 11:59 PM

Hi All, 

 

Got 79k on the "new" MKS Ecoboost, and wanted to know if anyone knew the best plug gap to run? The only mod I have is a drop-in K&N. 

 

I hear if you have a tune, you can run different than the stock recommended (.030). Does anyone know about this? 

 

Thanks










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#2 OFFLINE   lincwitsync

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Posted 30 April 2017 - 03:14 AM

.028 to .030 is the recommended gap from Livernois if you have their tune. I had erratic misfire on heavy throttle applications because I put the tune in without changing the plugs (at about 75,000 miles). I called Livernois and they said that the plugs should have been changed out miles ago. When I finally changed those plugs, my gaps were all over the place... (from .38 to .60 factory gaps were much higher) No wonder the car was misfiring. The end result, the car ran as smooth as silk and misfire went away.


Edited by lincwitsync, 30 April 2017 - 03:16 AM.


#3 OFFLINE   brucelinc

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Posted 30 April 2017 - 08:47 AM

Yes, what lincwitsync said!  Stock typically runs a .035 gap since there is no danger of spark blow-out with the stock boost pressure.    Motorcraft SP 534 plugs are the plug of choice.



#4 OFFLINE   j1980mac

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Posted 30 April 2017 - 02:36 PM   Best Answer

Hey guys, I haven't got a tune yet, but plan to soon. Speaking of the hesitation/misfire, I'm definitely sure that I've experienced this.  

 

The .028 gapped NGK-6510 are the plugs I went with.

 

Got them at Unleashed: http://www.unleashed...-gapped-to-028/



#5 OFFLINE   j1980mac

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Posted 06 May 2017 - 09:50 PM

Hey guys, I haven't got a tune yet, but plan to soon. Speaking of the hesitation/misfire, I'm definitely sure that I've experienced this.  

 

The .028 gapped NGK-6510 are the plugs I went with.

 

Got them at Unleashed: http://www.unleashed...-gapped-to-028/

 

Just a quick note, the plug change was a success and the car is beast! 



#6 OFFLINE   lincwitsync

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Posted 23 May 2017 - 06:01 PM

NICE!!!

It is so cool to experience someone else's experience with a very similar response.

Priceless.

 

Enjoy the MKS man.


Edited by lincwitsync, 23 May 2017 - 06:01 PM.





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