Misfire Under Load - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Dzmitry · 02-23-2021, 10:26 AM

Quote:

Originally Posted by gm5oh

Issue resolved! It was the spark plug. Plug gap was also 0.29 instead of factory 0.32. The car runs smoothly now! Thanks for all your help guys.

Awesome! Did they come in a pack and one was that far off??

Capt Spaulding · 02-23-2021, 12:30 PM

That's interesting. Too wide a gap can cause misfires under load as the cylinder pressures increase to the point the coil can't generate enough ooooommph to jump the gap. I'm surprised that too narrow a gap (particularly .03" too narrow) could do that. Glad you got i resolved - that kind of problem can be maddening.

gm5oh · 02-23-2021, 09:20 PM

Quote:

Originally Posted by Dzmitry

Awesome! Did they come in a pack and one was that far off??

Yep, that's what happened. I ordered all four together initially.

02-23-2021, 12:30 PM	#16
Capt Spaulding Persona Non Grata Join Date: Nov 2015 Drives: '15 BRZ (WRB) Location: On the Border Posts: 1,882 Thanks: 2,016 Thanked 2,780 Times in 1,200 Posts Mentioned: 10 Post(s) Tagged: 1 Thread(s)	That's interesting. Too wide a gap can cause misfires under load as the cylinder pressures increase to the point the coil can't generate enough ooooommph to jump the gap. I'm surprised that too narrow a gap (particularly .03" too narrow) could do that. Glad you got i resolved - that kind of problem can be maddening. __________________ Slow is smooth, and smooth is fast

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