Reading Sparkplugs

Here is how you properly read a spark plug. If you want to learn how to tune any engine WATCH this video!

[jcnpresser]

The best spark plug reading video I’ve seen, thanks for explaining and cutting the threads off. Now I know what to look for.

[nukedogger]

I've been watching car videos for years, and they'd talk about reading plugs, but never broke it down. I learned more in 5 minutes with this video than 5 plus years of watching car youtubers. Bravo!

[kevhauser]

never have I seen a better video or heard a better explanation on spark plug reading. Really Cool Steve!

[tomtucker]

The Steve Tech videos are accurate and very informative. Thank you Steve Morris for providing everyone in the automotive world with your wisdom, free of charge.

[LetsGoYall]

Great info as always. Could you touch on how/if different heat range plugs would have an effect on reading?

[rickwallace]

no truer words were ever spoken. I was taught this back in the 60s by a tune up guru. your exact explanation . All "tune them alls " tune via a lap top and dont wanna get there hands dirty. another good tool is a gas analizer, Co and HC under load tell a lot but most guys cant afford one and they cost a mint these days . I still have my old sun 111
5 and tuned 1000s of edelbrocks and hollys with it and reading plugs . you da man steve. Gawd I wish I were younger,

[bikeclochard]

Thanks for this video, finally a clear visual explanation of what lean really means! Subscribed

[Jim-Penn]

Steve, I think you should do a video on "when to check your plugs". For example, I would make a pass and right at the 1/4 beams, pop the trans in neutral and shut the engine off. Tow back to the pits, let the engine cool and then pull plugs to take a reading.
Those (and more details) would really be helpful to your audience (in my opinion)
Thanks for all the GREAT videos!

[chrismadaj]

you know we take it for granted all the time like you said the data but then actually look at the physical spark plug is where you get the most accurate result thank you Steve

[davidgretlein]

Excellent video, man. Love it. I used to watch the ol’ timers at the drag strip read there plugs with a jewelers eye loop. Now I know what they were reading.

[keithsanto]

Thanks for this video I used this for tuning on my motorcycle and ended up with some great results.

[jimcallicoat]

I really appreciate you sharing your knowledge on these videos I’ve never seen it explain this well before thank you

[benausman]

Best video on how to read plugs 👍 Thank you Steve.

[turbostang]

Very well explained Can't explain it any better than this video

[TrackedZ]

Learned something new. I always learned to inspect the tip, electrode, and threads when tuning. I need to do more. Thank you.

[dsauce]

Wow thanks. About half of what family members have told about looking plugs has turned out to be true. Now I’m going to go look at what top fuel plugs look like after a run just to see most extreme conditions.

[JG-zbom]

Great content sir! Thank you for the education. Headed out to the garage to cut apart all my plugs right now.

[devinmcalister]

Just want to say thanks for putting this info out there this is a great video! I applied this process to the 364ci SBC I built and put in my nissan240sx Ended up taking 2 jets from the primary and 6 from the secondary on a proform 750dp. tuned for the leanest hottest cylinder got it perfect as I could and the old butt Dyno says it picked up 20-30hp everywhere but next trip to the strip will tell. Thanks again bud keep up the great work. I have known about your engines for years but think it's the greatest thing to actually learn something straight from one of the best have a good one brother!

[tjsingh]

The algorithm at its best I was just setting timing on fresh rebuild marine BBC. Going to pull a plug and see how I did. Thanks Steve

[drakeolson]

This was the best video I have ever seen explaining this!!!!